ALU 7270 02_SysConfig.pdf

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Alcatel assumes no responsibility for the accuracy of the information presented, which is subject to change without notice.

Alcatel, the Alcatel logo, MainStreet, and Newbridge are registered trademarks of Alcatel. All other trademarks are the property of their respective owners.

Copyright 2001 Alcatel.All rights reserved.

Disclaimers

Alcatel products are intended for commercial uses. Without the appropriate network design engineering, they must not be sold, licensed or otherwise distributed for use in any hazardous environments requiring fail-safe performance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life-support machines, or weapons systems, in which the failure of products could lead directly to death, personal injury, or severe physical or environmental damage. The customer hereby agrees that the use, sale, licence or other distribution of the products for any such application without the prior written consent of Alcatel, shall be at the customer's sole risk. The customer hereby agrees to defend and hold Alcatel harmless from any claims for loss, cost, damage, expense or liability that may arise out of or in connection with the use, sale, licence or other distribution of the products in such applications.

This document may contain information regarding the use and installation of non-Alcatel products. Please note that this information is provided as a courtesy to assist you. While Alcatel tries to ensure that this information accurately reflects information provided by the supplier, please refer to the materials provided with any non-Alcatel product and contact the supplier for confirmation. Alcatel assumes no responsibility or liability for incorrect or incomplete information provided about non-Alcatel products.

Alcatel has made reasonable efforts to ensure that the 7270 Multiservice Concentrator, Release 4.3, complies in all material respects with the "Referenced Detailed Functional Specification for Newbridge Product Date Compliance" (for all loads). To obtain this document and other information related to Year 2000 Date Compliance, visit the Alcatel Year 2000 Date Compliance website at the URL:

http://www.cid.alcatel.com/year2000/index.html

However, this does not constitute a representation or warranty. The warranties provided for Alcatel products, if any, are set forth in contractual documentation entered into by Alcatel and its customers.

This document was originally written in English. If there is any conflict or inconsistency between the English version and any other version of a document, the English version shall prevail.

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Preface

This document describes the 7270 Multiservice Concentrator, Release 4.3, software generic A21614.

ContentsThe paper version of the 7270 Multiservice Concentrator Technical Practices is divided into four binders:

Product Introduction and InstallationThis binder contains general information about the 7270 MSC. It describes new features, explains the functions, and lists the specifications for each component in the system. This binder also contains installation instructions for each component.

System ConfigurationThis binder contains the configuration procedures you follow when you use the NMTI to configure the system.

Connection ConfigurationThis binder contains the configuration procedures you follow when you use the NMTI to configure connections on the switch.

Performance and Fault ManagementThis binder contains information about statistics, LEDs, diagnostics, and alarms on the 7270 MSC system.

Preface

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Related documentationThis document refers you to other documentation. Table 1 lists the customer documentation referred to by the 7270 Multiservice Concentrator Technical Practices.

Table 1 Related customer documentation

ConventionsTable 2 lists the documentation conventions used throughout this documentation set.

Table 2 Documentation conventions

Customer documentation Product release Part number

5620 Network Manager User Guide Release 4.1 90-0657-60

7470 Multiservice Platform Technical Practices Release 4.3 90-2480-91

IP Services Card Technical Reference Release 4.3 90-4521-43

Convention Description Examples

Key name Identifies a keyboard key. Delete

Italics Identifies a variable. hostname

Key+Key Type the appropriate consecutive keystroke sequence. CTRL+G

Key-Key Type the appropriate simultaneous keystroke sequence. CTRL-G

Press the Return key. Press

An em dash in a table cell indicates that there is no information or that the category is not applicable.

* An asterisk is a wildcard character that means any character in a search argument.An asterisk also indicates a default option for an NMTI parameter.

Path_analysis.*file

Indicates a submenu. File Save

Preface

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Special informationThe following are examples of how special information is presented in this document.

Procedures with options or substepsWhen there are options in a procedure, they are identified by letters. When there are substeps in a procedure, they are identified by roman numerals.

Procedure 1 Example of options in a procedure

At step 1, you can choose option a or b. At step 2, you must do what the step indicates.

1 This step offers two options. You must choose one of the following:

a This is one option.

b This is another option.

2 You must perform this step.

Danger The described activity or situation may pose a threat to personal safety.

Warning The described activity or situation may or will cause equipment damage.

Caution The described activity or situation may or will cause service interruption.

Note A note provides important information.

Preface

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Procedure 2 Example of substeps in a procedure

At step 1, you must perform a series of substeps within a step. At step 2, you must do what the step indicates.

1 This step has a series of substeps that you must perform to complete the step. You must perform the following substeps:

i This is the first substep.

ii This is the second substep.

iii This is the third substep.

2 You must perform this step.

Measurement conventions

Measurements in this document are expressed in metric units and follow the Systme international dunits (SI) standard for abbreviation of metric units. If imperial measurements are included, they appear in brackets following the metric unit. Table 3 lists the measurement conventions used in this document but not covered by SI.

Table 3 Bits and bytes conventions

Contact informationIf you have questions or comments about this documentation, please see:

http://www.cid.alcatel.com/contact/index.jhtml

Measurement Symbol

bit b

byte byte

dB/m decibels per meter

RU rack unit 1.75 in.

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Online documentation

Introducing online documentationYou can use InfoPort, a documentation Web viewer, to display online documentation for the 7270 Multiservice Concentrator Technical Practices.

InfoPort featuresInfoPort features include:

ability to scroll through chapters hyperlinks to related information topic and word searches bookmarks to create customized online documentation paths alternative views of the table of contents, such as a list of figures printing easy PDF creation of document chapters

Click on the InfoPort Help button for InfoPort procedures and for more information about InfoPort features.

Maintaining the online documentation libraryTechInfo.NOW is a subscription service that gives you access to the latest customer information, including new applications, improved methods of configuring and upgrading, bug fixes and product enhancements. InfoPort documents can be downloaded from the TechInfo.NOW website at:

http://www.cid.alcatel.com/support/index.jhtml

Online Documentation

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See the help.html file found in the directory where you installed the documentation or click on the Documentation Library button for information about maintaining your documentation library.

Displaying documentation To display the online documentation, open the library.html file found in the directory where you installed the documentation.

InfoPort documentation viewer orientationFigure 1 shows the InfoPort documentation viewer.

Figure 1 InfoPort documentation viewer

15609

Buttonbar

Banner barNavigator

frame

Next Chapter andPrevious Chapter

buttons

Content display frame


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The InfoPort documentation viewer is divided into the following parts:

banner barThe banner bar is located at the top of the InfoPort documentation viewer window. It contains the company logo and the title of the document you are browsing. Click on the company logo to link to the webpage.

button barThe button bar is located below the banner bar and contains the buttons listed in Figures 2 and 3.

navigator frame The navigation frame is located on the left side of the InfoPort documentation viewer window, below the button bar. It allows you to view and navigate the table of contents. The Next Chapter and Previous Chapter buttons appear at the top right side of the navigation frame.

content display frameThe content display frame is located on the right side of the InfoPort documentation viewer window and displays the content of the document you are browsing. Use hyperlinks and bookmarks to help you navigate through the documentation.


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Figure 2 InfoPort button bar buttons

Table of Contents Click on the Table of Contents button toview an expandable and collapsible listof the document's parts down to thesection level.

List of Figures Click on the List of Figures button toview a list of the figures in thedocumentation.

List of Tables Click on the List of Tables button to viewa list of the tables in the documentation.

List of Procedures Click on the List of Procedures button toview a list of the procedures in thedocumentation.

Index Click on the Index button to view analphabetical list of the document's indexentries. Use the drop-down menu tonavigate through the index entries.See Procedure 18-1 for moreinformation.

Documentation Library Click on the Documentation Librarybutton to view the documentation librarywindow, which has a hyperlink to eachbook.

Introductory Splash Screen Click on the Introductory Splash Screenbutton to view the introductory splashscreen.

Button name DescriptionIcon

15279


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Figure 3 InfoPort button bar buttons

Glossary Click on the Glossary button to view theglossary. Use the drop-down menu tonavigate through the glossary entries.

PDF Click on the PDF button to view or printa PDF version of the documentation.

Rebranding Click on the Rebranding button to viewthe rebranded product portfolio.

Find Topic Click on the Find Topic button toperform a search in the documentation.See Procedure 18-2 for moreinformation.

Print Click on the Print button to print theinformation that appears in thedocumentation frame.You can print a PDF or an HTMLversion.

Help Click on the Help button to launch theInfoPort documentation viewer onlinehelp.

Button name DescriptionIcon

15280


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Navigating through the online documentationThe navigation features described in this section help you to move easily through the online documentation.

Table of contentsThe table of contents contains a hierarchical list of the topics in each open document. Use it to navigate through the document. Click on any title in the table of contents to jump to the corresponding location in the content display frame.When you first open a document, you usually see only the highest levels of the table of contents: the title of the document and the titles of its major divisions.To expand a level in the table of contents, click on the right arrow icon. Any heading preceded by a right arrow can be expanded. When a division is expanded, the arrow is replaced with one that points down. When you click on the down arrow, the list of subsections disappears.

Alternative viewsYou can change the view in the table navigator frame by clicking on the List of Procedures, List of Figures, or List of Tables buttons in the button bar.

IndexThe index contains an alphabetical listing of the index entries in each open document. Each entry provides a hypertext link to the appropriate location in the document.

A fast-find feature allows you to jump to a specific letter in the alphabet. See Procedure 1 for more information about searching the online documentation using the index.

HyperlinksHyperlinks are embedded software links that allow you to jump from one part of the online documentation to another. Hyperlinks appear in blue.

Hyperlinks are found in body text and in tables throughout the online documentation. They link to chapters, sections, tables, table notes, and figures.

When you position the cursor over the hyperlink, the cursor changes to a pointing hand. To jump to the part of the documentation the hyperlink indicates, click on the link.


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BookmarksA bookmark is an icon that marks a location in your online document for future reference. The bookmarks you create using the InfoPort viewer appear in the bookmarks list for your web browser. You can organize your document bookmarks by sorting them into meaningful folders.

Figure 4 shows the bookmark icon.

Figure 4 Bookmark icon

Online presentation featuresThe presentation features described in this section have been added to the online documentation to help you access information.

GlossaryYou can view glossary terms in a new window by clicking the View Glossary icon.

FiguresYou can open an inline figure in a separate window by clicking on it in the content display frame. This feature allows you to view the selected figure while scrolling through the related information in the content display frame.

TablesInline tables appear in the content display frame within the body text. Some tables contain hyperlinks that allow you to quickly access information.

Many tables contain notes that supplement information in a cell. You can view these notes by clicking on the table note number in the table or by scrolling to the bottom of the table.


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Searching the online documentationYou can search the documentation using the index or using the Find Topic button.

Procedure 1 To search the documentation using the index1 Click on the Index button on the button bar.

The navigator frame displays the index.

2 Find the word or character string using one of the following methods.

a Click on the button at the top of the index that appears beside the phrase Go to entries starting with and choose the first letter of the word or string.

The index displays the indexed words for the selected letter.

b Scroll through the navigator frame and click on the word or string.

The content display frame displays the information for the index entry.

3 Choose EditFind in Frame from the Netscape menu to highlight a word or string in the content display frame.

Procedure 2 To search the documentation using the Find Topic button

1 Click on the Find Topic button on the button bar.

The Find Topic window appears.

2 Choose the number of occurrences you want the Find Topic window to display.

3 Enter a word or string in the Find field.

Note 1 The first time you click on the Find Topic button, the topic database may take a few seconds to load. For subsequent searches, this process is faster. The results of your most current topic find remain accessible and active until you search for a new topic.

Note 2 The Find Topic feature is case-insensitive. For example, if you enter ethernet, you will receive occurrences of Ethernet as well.


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4 Click on the Topic button to view the pull-down menu for search filtering options and choose one of the options outlined in Table 1.

Table 1 Search filter options

5 Click on the Go button.

The matching occurrences for the word or string appear in a Results list, as shown in Figure 5.

If there are more occurrences, click on the Next button to display additional results. Click on the Prev button to scroll back to previous results.

Figure 5 Find Topic window

6 Click on a word or string in the Results list to display the corresponding topic in the content display frame.

7 Choose EditFind in Frame from the Netscape menu to highlight the word or string in the content display frame.

Option Description

Topics Choose Topics to search titles and index entries.

Titles Choose Titles to search titles.

Procedures Choose Procedures to search procedure titles and index entries.

Figures Choose Figures to search figure titles and index entries.

Tables Choose Tables to search table titles and index entries.

15608

Find field

Results list


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Managing bookmarksThis section describes how to create and manage your bookmarks.

Procedure 3 To create a bookmark1 Click on the bookmark icon to the right of the relevant title in the content display

frame.

2 Follow the instructions in the pop-up window to create or file a bookmark in your browser.

3 From the bookmarks menu, click on a bookmark to see the appropriate information in the content display frame.

Procedure 4 To create a journalA journal is a set of bookmarks that you frequently use.1 Choose BookmarksEdit Bookmarks in Netscape.

2 Choose FileNew Folder.

3 Create a folder called Journal.

4 Click on the bookmark icon for the section you want to add to your journal. A new window opens with instructions on how to file the bookmark.

5 File the bookmark in the Journal folder.

6 Repeat steps 4 and 5 for each section you want to include in the Journal folder.

7 Choose BookmarksEdit Bookmarks to rearrange the order of bookmarks in the Journal folder.


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Printing online documentationWhile browsing a document, you may locate information you want to print. A document is broken into small components such as sections and procedures so you can easily print only the component being viewed.

If you want to print the whole document, choose the PDF icon and print the PDF version.

Procedure 5 To print content information1 Click on the Print icon in the banner bar. A new window opens.

2 Select one of the following:

a HTML to send the appropriate pages to your default printer.

b PDF to open a new window with the appropriate document loaded. Choose FilePrint from this new window to print the document.

3 Click the Print icon in the new window.

Closing the online documentation browser windowChoose FileQuit from the InfoPort menu to quit the current online documentation session. When you choose FileClose View from the InfoPort viewer menu, the online documentation appears as an icon.


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Contents

Preface iii

Online documentation vii

Node management sessions

34 Working with node management sessions 34-134.1 Before logging in ............................................................................................. 34-234.2 Support for features and software generics .................................................... 34-234.3 Accessing the node ........................................................................................ 34-234.4 Logging in and out .......................................................................................... 34-334.5 NMTI inactivity timer ....................................................................................... 34-534.6 Screen layout .................................................................................................. 34-634.7 Softkeys .......................................................................................................... 34-934.8 Keyboard entries ........................................................................................... 34-1134.9 Example ........................................................................................................ 34-12

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35 Identifiers 35-135.1 Fabric identifiers ............................................................................................. 35-235.2 Shelf identifier ................................................................................................. 35-235.3 Slot identifiers ................................................................................................. 35-235.4 Port identifier information ................................................................................ 35-235.5 IMA group identifiers ....................................................................................... 35-335.6 Frame stream identifiers ................................................................................. 35-335.7 Endpoint information ....................................................................................... 35-335.8 Summary ........................................................................................................ 35-4

System parameters

36 Configuring the system 36-136.1 Switching fabric ............................................................................................... 36-236.2 Switching fabric type ....................................................................................... 36-236.3 Switching fabric profile .................................................................................... 36-336.4 Switching to the redundant switching fabric .................................................... 36-436.5 Configuring the system queue service factor .................................................. 36-536.6 CAC ................................................................................................................ 36-636.7 TCA profiles .................................................................................................. 36-14

37 Configuring node parameters 37-137.1 Serial-port baud rate ....................................................................................... 37-237.2 Date, time, and node name ............................................................................ 37-337.3 Using NTP servers for time and date .............................................................. 37-437.4 Access levels and passwords ......................................................................... 37-637.5 CPSS node parameters .................................................................................. 37-837.6 Managing CPSS ........................................................................................... 37-1137.7 IP addresses and Subnet mask .................................................................... 37-15

38 Configuring synchronization 38-138.1 System synchronization .................................................................................. 38-238.2 Synchronization module present or not present ............................................. 38-338.3 Selecting synchronization sources ................................................................. 38-338.4 Disabling and enabling synchronization sources ............................................ 38-538.5 Synchronization mode .................................................................................... 38-638.6 Managing system synchronization .................................................................. 38-7

39 Configuring SNMP parameters 39-139.1 Configuring SNMP access communities ......................................................... 39-239.2 Configuring SNMP trap communities .............................................................. 39-439.3 Deleting SNMP communities .......................................................................... 39-6

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40 Configuring the shelf 40-140.1 Configuring the shelf name ............................................................................. 40-240.2 Configuring the call control group ................................................................... 40-240.3 Viewing shelf information ................................................................................ 40-3

41 Managing the database 41-141.1 Transferring files ............................................................................................. 41-241.2 Resetting the database ................................................................................... 41-6

42 Software downloading 42-142.1 Introduction ..................................................................................................... 42-242.2 Downloading ................................................................................................... 42-2

Card and slot management

43 Configuring and managing cards 43-143.1 Configuring slots for card type ........................................................................ 43-243.2 Naming slots ................................................................................................... 43-643.3 Managing cards and slots ............................................................................... 43-643.4 Managing the Control card ............................................................................. 43-8

44 Viewing card and slot information 44-144.1 Network inventory information ........................................................................ 44-244.2 Slot summary information ............................................................................... 44-344.3 Viewing hardware and SEEP information ....................................................... 44-544.4 Control card configuration and management information ............................... 44-844.5 Hub card configuration information ............................................................... 44-1044.6 Interface card configuration information ....................................................... 44-11

Slot options

45 Configuring slot options for frame relay cards 45-145.1 Configuring frame relay card level congestion thresholds .............................. 45-245.2 Viewing slot option information for frame relay cards ..................................... 45-345.3 Selecting TCA profiles for frame relay cards .................................................. 45-4

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46 Slot configuration for IMA 46-146.1 Viewing IMA slot configuration ........................................................................ 46-246.2 IMA slot configuration options ......................................................................... 46-246.3 Configuring IMA module presence ................................................................. 46-346.4 ICP header ...................................................................................................... 46-4

47 Configuring slots for OC3 CR and STM1 CR cards 47-147.1 Viewing slot information for OC3 CR and STM1 CR cards ........................... 47-2

48 Slot configuration for DS3 CR and E3 CR cards 48-148.1 Viewing slot information for DS3 CR and E3 CR cards .................................. 48-2

49 Slot configuration for voiceband services cards 49-149.1 Slot information for the voiceband services card ............................................ 49-249.2 DSP transport modules ................................................................................... 49-349.3 License credits ................................................................................................ 49-4

50 Configuring APS 50-150.1 Configuring the type of redundancy ................................................................ 50-250.2 Configuring the switching mode ...................................................................... 50-350.3 Configuring the switching type ........................................................................ 50-450.4 Configuring the WTR timer ............................................................................. 50-550.5 Managing card protection ............................................................................... 50-6

Ports

51 Configuring and managing ports 51-151.1 Physical port options ....................................................................................... 51-351.2 Naming ports .................................................................................................. 51-751.3 Line termination .............................................................................................. 51-751.4 Framing type ................................................................................................... 51-851.5 Trunk conditioning .......................................................................................... 51-951.6 Robbed bit signaling ..................................................................................... 51-1551.7 Signaling ....................................................................................................... 51-1651.8 Alarm time ..................................................................................................... 51-1751.9 CRC framing ................................................................................................. 51-1851.10 Channel speed .............................................................................................. 51-1951.11 Zero suppression .......................................................................................... 51-1951.12 E1 national use bits ...................................................................................... 51-2051.13 AAL service ................................................................................................... 51-2151.14 Synchronization ............................................................................................ 51-2251.15 Playout buffer size ........................................................................................ 51-2451.16 Reference point ............................................................................................ 51-25

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51.17 Cell payload scrambling ................................................................................ 51-2651.18 Cell mapping ................................................................................................. 51-2751.19 DS3 application ............................................................................................. 51-2851.20 Line length .................................................................................................... 51-2851.21 PCR and SCR scaling factors ....................................................................... 51-2951.22 Line BER threshold ....................................................................................... 51-3151.23 Trail trace ...................................................................................................... 51-3251.24 Ethernet port speed ...................................................................................... 51-3451.25 Ethernet duplex port operation ..................................................................... 51-3551.26 Ethernet autonegotiation ............................................................................... 51-3751.27 Managing ports ............................................................................................. 51-4051.28 FDL mode ..................................................................................................... 51-4451.29 Idle channel suppression .............................................................................. 51-4451.30 Path trace ..................................................................................................... 51-4751.31 PSI clocking parameters ............................................................................... 51-4951.32 PSI control leads ........................................................................................... 51-5051.33 PSI gender .................................................................................................... 51-5151.34 PSI loopback processing .............................................................................. 51-5251.35 PSI port interface type .................................................................................. 51-53

52 TCA profiles 52-152.1 Selecting TCA profiles .................................................................................... 52-252.2 Viewing TCA profiles ...................................................................................... 52-8

53 Viewing ports 53-153.1 Viewing status information .............................................................................. 53-253.2 Viewing configuration information for T1, E1, and PSI FR ports .................... 53-753.3 Viewing configuration information for DS3 and E3 ports .............................. 53-1053.4 Viewing configuration information for SONET and SDH ports ...................... 53-1253.5 Viewing configuration information for Ethernet ports .................................... 53-13

Streams

54 Configuring and managing streams 54-154.1 Creating a stream ........................................................................................... 54-254.2 Viewing stream information ............................................................................ 54-254.3 Naming streams .............................................................................................. 54-554.4 Deleting streams ............................................................................................. 54-654.5 Stream configuration options .......................................................................... 54-654.6 Selecting TCA profiles for streams ................................................................. 54-754.7 Managing streams ......................................................................................... 54-8

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55 Configuring stream parameters 55-155.1 64 kb/s channels ............................................................................................. 55-255.2 Stream application .......................................................................................... 55-355.3 Congestion thresholds for streams ................................................................. 55-555.4 DLCI range for frame relay SVCs ................................................................... 55-755.5 HDLC parameters ........................................................................................... 55-855.6 Frame size ...................................................................................................... 55-9

56 Configuring frame stream management 56-156.1 Management protocol ..................................................................................... 56-256.2 Heartbeat ........................................................................................................ 56-556.3 Timeout ........................................................................................................... 56-656.4 Status rate ...................................................................................................... 56-756.5 Error threshold ................................................................................................ 56-756.6 Alarm filters ..................................................................................................... 56-9

DS1 circuits on the DS3 circuit emulation card

57 Configuring and managing DS1 circuits 57-157.1 DS1 circuit configuration overview .................................................................. 57-357.2 Naming circuits ............................................................................................... 57-457.3 Managing circuits ............................................................................................ 57-457.4 Physical options for DS1 circuits .................................................................... 57-657.5 Framing type on DS1 circuits .......................................................................... 57-657.6 Alarm time ....................................................................................................... 57-757.7 FDL mode ....................................................................................................... 57-857.8 Playout buffer size .......................................................................................... 57-957.9 Synchronization ............................................................................................ 57-1057.10 54016 addresses .......................................................................................... 57-1157.11 Target address .............................................................................................. 57-1257.12 Origination address ....................................................................................... 57-1357.13 TCA profiles information ............................................................................... 57-1357.14 Selecting DS1 circuit TCA profiles ................................................................ 57-1457.15 AAL1 performance ........................................................................................ 57-1557.16 Viewing TCA profiles .................................................................................... 57-16

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58 Viewing DS1 circuits 58-158.1 Managing circuits ............................................................................................ 58-258.2 Physical options for DS1 circuits .................................................................... 58-358.3 Framing type on DS1 circuits .......................................................................... 58-358.4 Alarm time ....................................................................................................... 58-458.5 FDL mode ....................................................................................................... 58-558.6 Playout buffer size .......................................................................................... 58-658.7 Synchronization .............................................................................................. 58-758.8 54016 addresses ............................................................................................ 58-858.9 Target address ................................................................................................ 58-958.10 Origination address ....................................................................................... 58-10

Channel groups

59 Configuring channel groups 59-159.1 Configuration options for channel groups ....................................................... 59-259.2 Creating channel groups ................................................................................. 59-259.3 Adding channels ............................................................................................. 59-359.4 Naming channel groups .................................................................................. 59-459.5 Showing channels in a channel group ............................................................ 59-459.6 Configuring the playout buffer size ................................................................. 59-559.7 Configuring the number of data octets ............................................................ 59-659.8 Deleting channels and channel groups ........................................................... 59-8

60 Viewing channel groups 60-160.1 Viewing channel group information ................................................................. 60-2

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IMA

61 Configuring and managing IMA 61-161.1 IMA configuration options ............................................................................... 61-261.2 Creating IMA groups ....................................................................................... 61-261.3 Deleting IMA groups ....................................................................................... 61-361.4 Adding links to an IMA group .......................................................................... 61-461.5 Deleting links from an IMA group .................................................................... 61-461.6 Link activation timeout for an IMA group ........................................................ 61-661.7 Link deactivation timeout for an IMA group .................................................... 61-661.8 Reference point .............................................................................................. 61-761.9 Configuring links for CAC ............................................................................... 61-761.10 Dynamic CAC level mode ............................................................................... 61-861.11 Minimum link number ...................................................................................... 61-961.12 IMA group synchronization ........................................................................... 61-1061.13 Differential link delay ..................................................................................... 61-1161.14 Managing IMA ............................................................................................... 61-12

62 Viewing IMA information 62-162.1 Viewing IMA configuration information ........................................................... 62-2

MTSM and eTM

63 Configuring and managing the MTSM and eTM 63-163.1 Overview ......................................................................................................... 63-263.2 Extended buffering .......................................................................................... 63-363.3 Per-VC queuing .............................................................................................. 63-363.4 Traffic shaping ................................................................................................ 63-363.5 ABR flow control ............................................................................................. 63-863.6 Configuring traffic shaping ............................................................................ 63-1063.7 Configuring VPA shaping .............................................................................. 63-1363.8 Configuring VS/VD for ABR connections ...................................................... 63-1563.9 Configuring ABR parameters for the connection .......................................... 63-1563.10 Connections affected by configuration changes ........................................... 63-1763.11 Cell relay statistics on the MTSM and eTM .................................................. 63-17

Contents

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CE-EC module

64 CE-EC module 64-164.1 Overview of the CE-EC module ...................................................................... 64-264.2 Echo cancellation features on the CE-EC module .......................................... 64-364.3 Voiceband profiles .......................................................................................... 64-764.4 Narrowband signaling support ........................................................................ 64-964.5 Broadband signaling of clear channel bearer capability ............................... 64-1064.6 CAS control of clear channel ........................................................................ 64-1064.7 Redundancy .................................................................................................. 64-1164.8 Configuration options .................................................................................... 64-11

Ethernet

65 Configuring the EN100 card 65-165.1 Overview of the EN100 card ........................................................................... 65-265.2 EN100 card options ........................................................................................ 65-465.3 Connection support ......................................................................................... 65-465.4 Ethernet bridge ............................................................................................... 65-565.5 Assigning a bridge name ................................................................................ 65-665.6 Configuring spanning tree ............................................................................... 65-665.7 Configuring entries in the filtering database ................................................. 65-1165.8 Configuring service group options ................................................................ 65-1565.9 Managing Ethernet bridges ........................................................................... 65-17

Contents

7270 Multiservice Concentrator, Release 4.3 xxviiiApril 2001 90-4521-43

Voiceband channels

66 Configuring voiceband channels and profiles 66-166.1 Configuration options for voiceband channels and profiles ............................ 66-366.2 Configuring voiceband channels or profiles .................................................... 66-466.3 Naming voiceband channels or profiles .......................................................... 66-566.4 Configuring basic options ............................................................................... 66-666.5 Configuring CAS on a VS card ....................................................................... 66-866.6 Configuring per-channel gain for a VS card .................................................... 66-966.7 Configuring a 64 kb/s clear channel ............................................................. 66-1066.8 Configuring echo cancellation ....................................................................... 66-1166.9 Configuring a speech coder .......................................................................... 66-1266.10 Configuring the speech packing factor on VS cards ..................................... 66-1466.11 Connected channel limitations due to coder and

packing factor configuration ................................................................. 66-1566.12 Configuring silence suppression on VS cards .............................................. 66-1666.13 Configuring speech filters on VS cards ......................................................... 66-1766.14 Configuring DTMF detection on VS cards .................................................... 66-1866.15 Configuring fax demodulation on VS cards .................................................. 66-1966.16 Configuring fax and modem bypass on VS cards ......................................... 66-21

67 Voiceband profiles 67-167.1 Overview of voiceband profiles ....................................................................... 67-267.2 SVC options .................................................................................................... 67-367.3 Voiceband profile for a trunk group ................................................................. 67-567.4 Applying a voiceband profile ........................................................................... 67-667.5 Copying a voiceband profile ........................................................................... 67-867.6 Node predefined profiles ................................................................................. 67-9

68 Viewing voiceband information 68-168.1 Viewing voiceband information ....................................................................... 68-268.2 Voiceband parameter dependencies .............................................................. 68-368.3 Viewing information about voiceband channels and voiceband profiles ......... 68-568.4 Viewing CAS transport information ................................................................. 68-768.5 Viewing permanent clear channel information ................................................ 68-868.6 Viewing speech information ............................................................................ 68-968.7 Viewing fax and modem information ............................................................. 68-1068.8 Viewing SVC options information of voiceband profiles ............................... 68-11

Glossary

Index

7270 Multiservice Concentrator, Release 4.3 34-1April 2001 90-4521-43

34 Working with node management sessions

34.1 Before logging in 34-2

34.2 Support for features and software generics 34-2

34.3 Accessing the node 34-2

34.4 Logging in and out 34-3

34.5 NMTI inactivity timer 34-5

34.6 Screen layout 34-6

34.7 Softkeys 34-9

34.8 Keyboard entries 34-11

34.9 Example 34-12


34-2 7270 Multiservice Concentrator, Release 4.390-4521-43 April 2001

34.1 Before logging in

You should be trained to telephone company standards or equivalent. You should also be familiar with:

the use of a node management terminal or a network management system, described in chapter 19

the node management concepts described in this chapter and the system concepts described in chapter 2

34.2 Support for features and software generics

Node management sessions allow you to configure the components and features in Release 4.3 of the 7270 MSC system. The components and features available to you depend on the type of system and cards, the system software generic release, and the node or software generic of the node or network management release. Some systems may not have all the features described in this document.

The NMTI screen may display softkeys not supported in this release or not applicable to your configuration. See section 34.7 for more information about softkeys.

34.3 Accessing the node

This section describes how to access the system to start a node management session.

The procedure for accessing the node depends on the access equipment.

To access the system from a 5620 NM, see the 5620 NM documentation.

To connect a serial-based node management terminal, see section 20.2 then complete the following tasks:

connect the terminal to a system serial port power up the terminal configure the terminal to match the configuration of the system serial port

To connect to the system from an Ethernet-based node management terminal, see section 20.3 then complete the following tasks:

connect the terminal to a system Ethernet port power up the terminal use Telnet to access the system through its IP address



34.4 Logging in and out

The procedure in this section describes how to log in and out of a node management session.

Up to six node management sessions can be active at one time on the active Control card. You can access five of the seven sessions by telnet. One of the five telnet sessions is reserved as a read-write session; the remaining four have read-only status. One session per Control card can be accessed through serial ports. See section 20.2 for details.

Only one session has read-write privileges at any given time. When you start a second node management session with read-write privileges while a read-write session is already in progress, you can choose to disconnect the existing read-write session and assume the read-write privileges or log in with read-only privileges.

Level

There are six access levels: 0 to 5. Level 0 provides read-only access; levels 1 to 5 provide read and write access. See section 37.4 for more information about access levels.

Password

The default password for all levels is mainstreet. The password is not displayed and is not case-sensitive.

A level 5 user can change passwords for any level. When the password for your level has been changed, contact the network administrator.

See To change the password in section 37.4 to change passwords.



Procedure 34-1 To log on

After you access the system, you can log on.

1 Press at approximately 3-s intervals until the enter level prompt appears:

Enter level:

2 Enter your level.

a When this is the first session on the 7270 MSC or when the level is 5, enter:

b When you have been assigned an access level, enter:

where level is the access level from 0 to 5

c To view management information without modifying it, enter:

3 If you entered an access level other than 0, enter the password for the level:

where password is a string containing 8 to 12 alphanumeric characters, with no spaces

When a read-write node management session is already in progress and you attempt to log in with read-write privileges, a message appears asking if you want to end the current read-write session and assume read-write privileges. Enter Y to begin your session and notify the previous user that the NMTI session will terminate with the next keystroke.

Procedure 34-2 To log out

You can log out in one of the following five ways:

select QUIT from the main menu, enter from an information entry prompt, enter to exit the prompt, and then from a keyboard entry prompt, enter to exit the prompt, then twice from any other menu, enter twice



34.5 NMTI inactivity timer

You can configure the timer to terminate an NMTI session after a period of inactivity. The range is 1 min to 24 h. The default setting is 12 h. Set the timer to 0 to disable it.

A second timer protects telnet resources by terminating sessions that are not logged in to NMTI and that are inactive for 1 min.

Procedure 34-3 To configure the NMTI inactivity timer1 Select:

HOUSE MORE SESS_TIMEOUT

2 Enter the duration of the timeout session.

a To set the timer to its default setting, select:

DEFAULT

b To set the timer for a specific number of minutes, enter:

MINUTES

where minutes is a value 0 to 59

c To set timer for a specific number of hours, enter:

HOURS

where hours is a value 1 to 24



34.6 Screen layout

Figure 34-1 shows the node management screen. The main menu displays when you log in. The menu softkeys are at the bottom of the screen.

Figure 34-1 Main menu

1-CONFIG

6-2-HOUSE

7-

3-MAINT8-

4-STATS

9-QUIT5-ALARMS

0-

6471

Product Generic_Release Long_Name Date TimeAlarms:2



The node management screen is 78 characters wide by 24 lines high and contains five functional areas, see Figure 34-2. As you work with the node management session, the functional areas of the screen change to display relevant information.

Figure 34-2 Layout of the node management session screen

Header lineThe header line displays information about the node to which you are connected.

Product indicates the node type. Generic_Release indicates the Control card software generic. Long_Name (node_name:Pshelf-slot) indicates the configured name of the node,

and the shelf and slot of the active Control card, for example, DENVER:P1-1. You can configure the name of the node; see section 37.2.

Sev:Alarms:Number indicates the highest level of severity of any alarm in the system and the total number of critical, major, and minor outstanding alarms. You can view alarms; see section 146.1.

Date indicates the date in the format dd:mm:yy. You can set the date on the node manually or by using NTP; see sections 37.2 and 37.3 for instructions.For a standby Control card, the header line contains the string OnStandby instead of the date.

Time indicates the time using a 24-hour clock in the format hh:mm.You can set the time on the node manually or by using NTP; see sections 37.2 and 37.3 for instructions. When you have not set the time, it appears with an R to indicate the elapsed time since the last system reset.

1-

6-2-

7-MORE

3-8-CANCEL

4-

9-QUIT5-

0-PROCEED

Product Generic_Release Long_Name Date

Active

TimeAlarms:2Header lineAutomaticProtectionStatus line

Command line

Text area

Data area

Softkey area

6363



Automatic protection status lineThe automatic protection status line indicates the protection status of the displayed card. Table 34-1 lists the possible statuses.

Table 34-1 Automatic protection status

Data areaThe data area displays information associated with the current menu item.

Command lineThe command line displays softkey selections and keyboard entries.

Text areaThe text area displays prompts, error messages, and information about the valid range for numeric entries.

Softkey areaThe softkey area displays the softkeys associated with function keys to or number keys to and .

Procedure 34-4 To refresh the display

You can refresh the information on the NMTI screen by entering and then .

Refreshing the screen is useful when you are monitoring time-sensitive displays such as system alarms or statistics, or when a transmission error or other delay-causing event occurs.

Status Definition

Active The working card is not spared.

Spared by Pshelf-slot The working card is spared.

Standby The protection card is on standby.

Protecting Pshelf-slot The protection card is sparing a working card.



34.7 Softkeys

A softkey is a key that is associated with different functions or commands at different times.

Softkeys are named according to the function displayed for that softkey. Function names are uppercase, such as PROCEED. They can contain underscores, hyphens, or slashes. For simplicity, the term softkey means the key associated with a function and the function itself.

The available softkeys appear in the softkey area. Each softkey is associated with a function key or number key on the keyboard.

In this document, softkey names appear as they do on the screen.

Softkey menusA group of softkeys that appears together is called a menu.

The group of six softkeys that appears when you log in to a node is called the main menu.

Procedure 34-5 To select a softkey

You can select a softkey by selecting the function key or the number key associated with the softkey. Number keys to are equivalent to function keys to . Number key is equivalent to function key . When the node management session prompts you for a keyboard entry and you want to select a softkey, press then the function key or number key associated with the softkey.

For example, in Figure 34-1, you can select the CONFIG softkey with either of the following key sequences: or . See section 34.8 for information about keyboard entries.

The NMTI displays most softkeys in sequence on the command line as you select them, with the exception of MORE, CANCEL, QUIT, PROCEED, and display-related softkeys, such as SHOW_CONNECT.

Instructions

An instruction or command is a sequence of softkey selections and keystrokes that results in an action or change of state. The instruction takes effect after you select the PROCEED softkey.

Toggle softkeysUse a toggle softkey to select one of two commands associated with the same softkey.



When you select a toggle softkey, the activity governed by the softkey and the softkey label change to the alternate option, usually opposite to the original; for example, use the same softkey for ON and OFF.

Display-related softkeysSome softkeys display information while you are entering an instruction. These softkeys change the display in the data area without interrupting the instruction.

Procedure 34-6 To undo a selection

CANCEL undoes the current part of an instruction. It removes the last few selected softkeys from the command line and displays the menu as it was before you selected those softkeys.

CANCEL is always function key .

Procedure 34-7 To display the main menu

From the main menu, QUIT logs you out of the node. From any other menu, QUIT displays the main menu of the node management session.

QUIT is always function key .

Procedure 34-8 To execute an instruction

To execute an instruction after you enter it, select PROCEED. The PROCEED softkey appears in the softkey area only when you can select it. The message Press PROCEED to confirm change displays. The procedures in this document do not direct you to select the PROCEED softkey; follow the prompt on the screen.

After you select PROCEED, all softkeys except CANCEL, QUIT, and PROCEED disappear briefly and a message indicates that the system is implementing the instruction.

When the system completes the instruction, it displays the most useful softkey menu for the next operation. Part of the instruction remains on the command line, to save you from having to re-enter it.

PROCEED is always function key .



34.8 Keyboard entries

Use the keyboard to make keyboard entries. Examples of keyboard entries are an endpoint identifier, a node name, or traffic rate. When a keyboard entry is necessary, the screen displays:

a series of question marks or periods in quotation marks, such as ??-?? or ... on the command line

a prompt beginning with the word Enter in the data area, such as Enter the traffic rate

CANCEL, QUIT, and display-related softkeys only in the softkey areaWhen you enter information, your entry replaces the prompt on the command line. Use the or key to correct typing errors. Use the key to exit a menu that you do not want.

This document uses angle brackets (< >) to indicate keyboard entries. A description of the keyboard entry is given in angle brackets in italics; for example, and .

FormatMost keyboard entries have specific formats that you must follow. The prompt on the command line or text area indicates the required format. This document also includes the correct format in each procedure.

For example, enter the date in the format , where dd is the day of the month, MMM is the first three letters of the month and yyyy is the year. You must enter the hyphens. You would enter September 6, 1999 as .

In many cases, the format is a mixture of specific letters and variable information. For example, in a format like , S and D must be entered as S and D, and stream and d represent variable information. You must also enter the slash. A valid entry in this format would be .

Procedure 34-9 To end a keyboard entry

When you finish a keyboard entry, press .



34.9 Example

This example shows you how to work with the node management session. Carry out the steps on your workstation as you read.

The example shows you how to configure a slot for the type of card that is in the slot. The card is in slot 4 on the 7270 MSC shelf.

Procedure 34-10 To configure a slot1 Log in, see section 34.4 for instructions.

The main menu displays.

2 Select CONFIG from the main menu.

3 Select OBJECT from the menu.

4 Select SLOT from the menu.

5 Identify the shelf and slot:

6 Select TYPE AS_PRESENT from the menu.

7 Select PROCEED from the menu.

8 Finish the example by selecting QUIT to display the main menu.


35 Identifiers

35.1 Fabric identifiers 35-2

35.2 Shelf identifier 35-2

35.3 Slot identifiers 35-2

35.4 Port identifier information 35-2

35.5 IMA group identifiers 35-3

35.6 Frame stream identifiers 35-3

35.7 Endpoint information 35-3

35.8 Summary 35-4

35 Identifiers


35.1 Fabric identifiers

The two switching fabrics are X and Y. The fabric identifier refers to the switching fabric on the Hub card.

35.2 Shelf identifier

Use a P identifier to identify a shelf. The P identifier for the 7270 MSC is P1.

The system automatically configures the P identifier. See section 40.3 for more information about P identifiers.

35.3 Slot identifiers

Use the Pshelf-slot format to identify slots. Identify card slots as 1 to 7 for the 6-slot shelf and 1 to 9 for the 8-slot shelf. Each interface card consists of an interface card and an interface I/O card. Slots 1 and 2 of shelf P1 are reserved for Control cards; identify these slots by as P1-1 or P1-2 or by CTL and ICTL for the active and inactive Control cards. Identify Hub card slots as P1-HX and P1-HY.

35.4 Port identifier information

Table 35-1 lists the port identifiers. Identify the port in the shelf-slot-port format. For example, identify port 3 of a card in slot 3 of shelf P1 as P1-3-4.

Table 35-1 Port identifiers

Note(1) For information about logical port identifiers, see section 35.5.

Port type Port identifiers

Hub, OC3, STM1, and DSE circuit emulation 1

DS3 and E3 cell relay 1 to 3

EN100 Ethernet 1 to 4

T1 and E1 frame relay 1 to 4

T1 and E1 voiceband services 1 to 4

T1 and E1 circuit emulation, and T1 and E1 cell relayThe port identifier for T1 and E1 cell relay cards refers to the physical port. (1)

1 to 8

PSI frame relay 1 to 16

35 Identifiers


35.5 IMA group identifiers

T1 CR and E1 CR cards with the optional IMA module have two types of ports: physical and logical. Logical ports contain 1 to 8 physical ports called IMA groups. There are up to four IMA groups on each card.

Identify an IMA group in the form Pshelf-slot-Lport where L is the prefix for the logical port. For example, identify IMA group 1 of a card in slot 3 as P1-3-L1.

When you enter the identifier of an IMA group that does not already exist, the system creates a new group. The system then prompts you to add the physical ports to the new group.

See section 61.2 for more information about creating IMA groups.

35.6 Frame stream identifiers

There can be up to 24 frame streams for each port of the T1 FR card. The E1 FR card supports up to 31 frame streams for each port.

The PSI FR card supports one frame stream for each port; the frame stream carries the entire bit stream of the port. The frame stream identifier is always 1.

For all cards, identify the frame stream in the Pshelf-slot-port;Sstream format, where stream is the frame stream number. For example, identify stream 1 of port 3 of a card in slot 5 of shelf P1 as P1-5-3;S1.

35.7 Endpoint information

The type of endpoint and its identifier depend on the type of card and connection. Table 35-2 lists the types of endpoints and the sections that describe them.

Table 35-2 Endpoint types

Endpoint type Section

Cell relay (includes cell relay and IMA groups) 15.5Circuit emulation (includes channel groups and circuits) 15.3Ethernet 15.6

Voiceband services 15.4

Frame relay (includes frame relay and frame forwarding) 15.2

35 Identifiers


35.8 Summary

Table 35-3 lists the object identifier formats and values and provides an example. See Table 15-8 for a list of endpoint identifiers. Use these tables to complete the procedures in this documentation.

Table 35-3 Object identifiers

Note Slots 1 and 2 of shelf P1 are reserved for Control cards.

Identifier Object Format Value Example Fabric Shelf = X or Y X

Shelf Shelf = 1 P1

Slot Hub card = HX or HY P1-HX

Control card

Active or inactive

= 1 or 2 P1-1

Active CTL CTL

Inactive ICTL ICTL

Circuit emulation cardFrame relay cardCell relay cardVoiceband services cardEthernet card

= 1 to 7 P1-5

Port Hub card = 1 P1-HX-1

T1 FR and E1 FR cards = 1 to 4 P1-3-4

T1 CE and E1 CE = 1 to 8 P1-5-6

T1 VS and E1 VS = 1 to 4 P1-6-2

DS3 CR and E3 CR cards = 1 to 3 P1-7-2

OC3 and STM1 cards = 1 P1-6-1

EN100 card = 1 to 4 P1-4-3

PSI FR card = 1 to 16 P1-4-16

Bridge EN100 card = 1 to 4 P1-5-4

Bridge port EN100 card = A1 or L1 A1

Frame relay stream

T1 FR card = 1 to 24 P1-6-3;S15

E1 FR card = 1 to 31 P1-4-2;S29

PSI FR card = 1 to 16 P1-4-2;S1

Circuit DS3 CE card = 1 to 28 P1-3-1;C12

Channel group

T1 CE and E1 CE cards

= 1 to 24 or 1 to 31

P1-3-4;CG22

VCN EN100 card = 1 to 64 P1-2-1;64


36 Configuring the system

36.1 Switching fabric 36-2

36.2 Switching fabric type 36-2

36.3 Switching fabric profile 36-3

36.4 Switching to the redundant switching fabric 36-4

36.5 Configuring the system queue service factor 36-5

36.6 CAC 36-6

36.7 TCA profiles 36-14



36.1 Switching fabric

For a standalone system, set the switching fabric to STANDALONE. Configure the fabric as SIMPLEX or REDUNDANT.

Procedure 36-1 To configure the switching fabric

Select:

CONFIG SYSTEM FABRIC EQUIPMENT

36.2 Switching fabric type

You can configure the switching fabric type on the Hub card.

When you configure the switching fabric type as 32 K, you do not need to configure the switching fabric profile. Setting the fabric as 32K provides the optimum traffic management capabilities. See section 36.3 for information about the switching fabric profile.

Procedure 36-2 To configure the switching fabric type1 Select:

CONFIG SYSTEM FABRIC EQUIPMENT TYPE

2 Select:

32K_CELLS

Note 1 The 2 K and 12 K fabric types are not supported as of Release 2.0 of the 7270 MSC. Choosing 32K during a software upgrade causes this to be the only configurable option.

Note 2 When you configure the switching fabric type, the 7270 MSC automatically resets the Control cards.



36.3 Switching fabric profile

When the system is configured as 32 K, you do not need to choose the fabric profile. The 32 K fabric supports all service categories and supports better queueing capabilities than the 2 K and 12 K fabrics. Table 36-1 lists the fabric profiles.

Table 36-1 Fabric profiles

See section 77.2 for information about service categories for frame relay. See section 77.5 for information about service categories for cell relay. See section 77.5 for information about the EPD traffic policing option.

Profile Supported service categories Traffic characteristics

1* CBR/rt-VBR + nrt-VBR/UBR Voice, bursty video, and bursty image

2 CBR/rt-VBR + ABR/UBR Voice and bursty data

3 CBR/rt-VBR + nrt-VBR + ABR/UBR Voice, bursty video, bursty image, and bursty data

4 CBR/rt-VBR + nrt-VBR + UBR-EPD Data that requires a relatively low cell loss ratio

Caution When you change the switching fabric profile, the system disconnects all existing connections except for CBR and rt-VBR.

Note Changing the switching fabric profile may cause CAC to change the type of connections the node accepts.

For example, when you change from profile 2 to profile 1, CAC does not accept ABR connections.



Procedure 36-3 To configure the switching fabric profile1 Select:

CONFIG SYSTEM FABRIC PROFILE

2 Enter the profile.

a For voice, bursty video, and bursty image, enter:

b For voice and bursty data, enter:

c For voice, bursty video, bursty image, and bursty data, enter:

d For data that requires a relatively low cell loss ratio, enter:

3 Reset the Control card. See Resetting a card in section 43.3.

36.4 Switching to the redundant switching fabric

The system automatically enables switching fabric redundancy when there is a second Hub card in the system. The 7270 MSC identifies the redundant switching fabrics as switching fabric X and switching fabric Y.

When the system powers up, switching fabric X becomes the active fabric. If the active fabric experiences a problem, the system switches all traffic over to the redundant switching fabric.

The failure or removal of the Hub card can cause the switching fabric to change.

If a problem occurs on the active fabric that causes the system to switch fabrics, the system remains on the newly active fabric even when the problem on the other fabric is repaired. To switch to the redundant fabric, you can force a fabric switch using a node management session.

Caution A switching fabric change can cause a momentary service interruption.



Procedure 36-4 To change switching fabrics

You can determine which switching fabric is active before you switch to the redundant fabric.

1 Select:

MAINT SYSTEM FABRIC

2 Select:

FORCE_SWITCH

36.5 Configuring the system queue service factor

Bandwidth that is not allocated to CBR, rt-VBR, or nrt-VBR queuing points is split equally between ABR and UBR queuing points by default. You can change the ratio of unallocated bandwidth that is applied to the ABR and UBR queuing points on the node.

Cards that have the eTM installed and configured do not use the system queue service factor because the eTM uses WFQ to allocate bandwidth. See chapter 63 for information about the eTM.

Procedure 36-5 To configure the system queue service factor1 Select:

CONFIG SYSTEM FABRIC QUEUE_SERVICE

2 Select:

UBR_PERCENT or ABR_PERCENT

3 Enter:

where percentage is the percentage of unallocated bandwidth to be applied to the ABR or UBR queuing points

The remaining unallocated bandwidth is applied to queuing points with the other service category. For example, if you enter 70% for UBR_PERCENT, then ABR_PERCENT will automatically be set to 30%.



36.6 CAC

CAC is an algorithm that evaluates whether you can add a new connection to the node without affecting the service objectives of other connections.CAC is available for links and for trunk groups. This section describes CAC for links. See section 85.4 for information about CAC for trunk groups, including information about assigning a CAC profile to a trunk group.

CAC examines the shared resources of the switch, such as the number of existing connections, available bandwidth, and available buffers. It also examines the resource requirements of the proposed connection. CAC admits the proposed connection when it does not affect QoS guarantees for the existing connections. The switch must have available resources to accommodate the proposed connection and its projected resource requirements.The system supports 64 CAC profiles for cell relay and frame relay cards. Profile 1 is preconfigured: CAC is enabled with default values and the booking factor is set to 100% for each service category. For the other 63 profiles, you can independently enable or disable capacity checking and configure booking factors for each of the service categories.

The system automatically uses Profile 1 for circuit emulation cards. You can assign any CAC profile to cell relay ports and frame streams.

For cell relay endpoints with the nrt-VBR service category, you can affect the virtual bandwidth computation by configuring PCR and SCR scaling factors for the port. See section 51.21 for information about PCR and SCR scaling factors and their interaction with CAC options.

You can guarantee bandwidth for both ABR and UBR traffic by defining the nrt-VBR limit using one of the CAC profiles. The default CAC profile is set to 100%, which means that nrt-VBR traffic has higher priority than ABR or UBR traffic. When a database is upgraded to Release 2.0 and later, the rate limit is set to a default of 100% for all CAC profiles.

The system checks the nrt-VBR limit when:

a control card is reset a line card is inserted the CAC profile of the port is changed the rate limit of the profile is changed

The system raises an alarm if the connections are affected.

The rate limit applies only to cards that have the MTSM installed and configured. Cards that have the eTM installed and configured do not use the rate limit because the eTM uses WFQ to allocate bandwidth. See chapter 63 for more information about the MTSM and eTM.



The system automatically checks the system resources when a module type configuration change or configured card version occurs. The system raises an alarm if the QoS cannot be guaranteed on the existing connections.

For frame relay endpoints, the system translates frame relay traffic parameters to cell relay parameters in compliance with ATM Forum B-ICI specification Method 2, Option 1.

Table 36-2 lists how the CAC allocates system resources for the different types of service categories. See section 77.8 for information about configuring service categories.

Table 36-2 Resource allocation

When you configure CAC options, the system displays the number of endpoints for each service category and the number of CPSS connections.

Figure 36-1 shows an example of CAC for two OC3 cross-connections from sources 1 and 2 to a single destination. The cell source 1 cross-connection has a rate of 75 Mb/s and cell source 2 cross-connection has a rate of 50 Mb/s; together they use 125 Mb/s; the OC3 link to the destination endpoint can support up to 149.76 Mb/s. When you increase the cell source 2 cross-connection rate from 50 Mb/s to 75 Mb/s, CAC rejects the increase because the combined rate of 150 Mb/s exceeds the payload bandwidth of the cell destination.

Note Make sure that you follow the correct procedure for installing or replacing cell relay cards.

Service category Allocation basis

CBR PIR

rt-VBR and nrt-VBR PIR, SIR, and MBS

ABR and UBR MIR



Figure 36-1 Operation of CAC

Configure CAC options based on the service category and the queuing point type. See section 77.2 for information about service categories for frame relay. See section 77.5 for information about service categories for cell relay.

Table 36-3 lists the queuing point types.

Table 36-3 Queuing point types

You can configure the booking factor only when you enable capacity checking for the service category and queuing point type.

Table 36-4 lists the CAC options for each queuing point type and service category.

Table 36-4 CAC options

You can configure CAC to accept proposed connections that it would otherwise not admit. Do this by disabling capacity checking or by increasing the booking factor on one or more of the queuing point types.

Queuing point type Softkey

All interface cards LINE_CARD

Multiplexers on all Hub cards MUX

Reserved for future functionality SWITCH

Queuing point type Capacity checking Booking factor

Interface card

Multiplexer

Switch

9227

Slot 3 5 6

OC3

OC3

OC3

Cellsource 1

OC3 OC3

OC3

Bottleneck

Cellsource 2

Celldestination



Capacity checkingYou can enable or disable capacity checking for the service categories independently on each queuing point type.

Table 36-5 lists the configurable options for capacity checking.

Table 36-5 Configuration options for capacity checking

You can enable capacity checking on a service category and queuing point type even if the bandwidth used by existing connections exceeds the available capacity. When you re-enable capacity checking, the booking factor retains its previous value.

Disable capacity checking for a service category on one or more of the three queuing point types to force the system to accept all connections in a specific service category. For example, to accept all CBR connections, disable capacity checking for CBR on the switch, the multiplexer, and the interface cards.

When you enable capacity checking, you can configure the booking factor value for the service category and queuing point type.

Capacity checking is automatically updated to reflect the current configuration when you perform one of the following:

add a cross connect change the service category or TRAP attributes for a cross-connect endpoint add a trunk group with reserved bandwidth change the bandwidth reserved for a trunk group change the PCR or SCR scaling factor values for the nrt-VBR connections on a

port change the configured cell relay card version change the configured module type

If the virtual bandwidth exceeds the available bandwidth after a CAC update, a major alarm is raised. This indicates that QoS guarantees are no longer valid.

Option Softkey

Enable capacity checking (check for congestion) CHECK_CONGESTDisable capacity checking (accept all connections) ACCEPT_ALL



Increasing a booking factorYou can force the CAC function to accept connections in specific service categories by increasing the service category booking factor on one or more of the three queuing point types. You can configure the booking factor after you have enabled capacity checking.

The default booking factor is 100%. Table 36-6 lists the values and effects of CAC booking factor values.

Table 36-6 Effect of booking factors

Table 36-7 lists the effects of overbooking CAC on the service categories.

Table 36-7 Effect of overbooking on cell loss and delay guarantees

Booking factor value Effect

0% CAC does not admit any connections with the specified service category on the queuing point type.

1% to 99% CAC admits fewer connections than normal with the specified service category on the queuing point type.

100% CAC admits connections with the service category on the queuing point type. This sets CAC for normal.

101% to 999% CAC admits more connections than usual with the service category onthe queuing point type. Cell loss and cell delay guarantees for new or existing connections with this service category and lower-priority service categories are lost; see Table 36-7.

Service category with overbooking

Effect

CBR There is a loss of performance objectives for all new and existing connections on this queuing point.

rt-VBR There is a loss of performance objectives for all new and existing connections on this queuing point.

nrt-VBR There is a loss of performance objectives for new and existing nrt-VBR, ABR, and UBR connections on this queuing point.

ABR There is a loss of performance objectives for new and existing ABR and UBR connections on this queuing point.



Egress VC thresholdsEgress VC thresholds apply to cards that have the eTM installed and configured. You configure egress VC thresholds as part of the CAC profile. On the eTM, the CBR, rt-VBR, and nrt-VBR service categories share egress buffer space and have a reserved buffer space for each service category. To provide isolation and fairness among connections, you can configure per-VC buffer allocation thresholds for the egress buffer space for the CBR, rt-VBR, and nrt-VBR service categories. The values for each service category range between 0 and 65 535 cells. Table 36-8 lists the default threshold values for each service category.

Table 36-8 Default values for egress VC thresholds

Procedure 36-6 To configure CAC options1 Select:

CONFIG SYSTEM CON_ADMISSN

2 Select the queuing point type:

LINE_CARD or MUX or SWITCH

3 Select the service category:

CONSTANT_RATE or RT_VAR_RATE or NRT_VAR_RATE or AVAIL_RATE or UNSPECIF_RATE

4 Configure c

ALU 7270 02_SysConfig.pdf

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