Administering Cisco Unified Communications Manager

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Administering Cisco Unified Communications Manager

Managing Services and Initial Configuration of Cisco Unified Communications Manager


Outline

Cisco Unified Communications Manager Initial Configuration

Cisco Unified Communications Manager Network Configuration Options

Cisco Unified Communications Manager NTP and DHCP Considerations

DNS Reliance of IP Phones

Cisco Unified Communications Manager Network and Feature Services

Cisco Unified Communications Manager Enterprise Parameters

Cisco Unified Communications Manager Service Parameters


Cisco Unified Communications ManagerInitial Configuration


Cisco Unified Communications Manager Initial Configuration

Configure network settings NTP servers, DHCP services, remove DNS reliance

Verify network and Feature services

Activate the necessary feature services and check network services

Configure enterprise parameters

Modify enterprise parameters as required

Configure service parameters

Modify service parameters as required


Cisco Unified Communications ManagerNetwork Configuration Options


Network Configuration Overview

Internet

Master NTP Reference Clock

CUCM Publisher/DHCP

/TFTP

CUCM Subscriber

DNS Server

NTP

DHCP/TFTP

DNS


Network Components

Master NTP reference clock

NTP stratum 1 server, directly connected to radio receivers or atomic clocks.

Alternatively, a Cisco router can be configured as a master NTP server.

The Cisco Unified Communications Manager.

Publisher is the NTP client.

DHCP and TFTP server

DHCP server provides IP address configuration and TFTP server location to the IP phones.

TFTP server provides device configuration files, ringer files, and firmware upgrades to the IP phones.

A Cisco Unified CM server (typically publisher) can provide both the DHCP and TFTP services.

DNS serverProvides hostname to IP address resolution to the IP phones and user PCs.


Cisco Unified Communications ManagerNTP and DHCP Considerations


NTP Strongly RecommendedPublisher

Subscriber

Master Reference Clock

The publisher synchronizes to the external master clock source. The subscribers get their clock source from the publisher.


Changing NTP Settings

Add or delete NTP servers on the publisher. (Read-only for subscribers.)


DHCP Server Feature Support

DHCP server in Cisco Unified CM is designed to serve IP phones.

– Provides a subset of Windows 2000 Server DHCP functionality.

– Sufficient for IP phone purposes.

– Not designed to serve other network devices (PCs, etc.).

– Only for smaller deployments (up to 1000 IP phones).

Only one DHCP server per Cisco Unified Communications Manager cluster.

– DHCP server is a standalone server.

– No backup server exists.

Multiple subnets can be configured for each server.


Steps to Configure DHCP Phone Support

1. Activate DHCP Monitor Service.

2. Add and configure the DHCP server.

3. Configure the DHCP subnets.


Step 1: Activate DHCP Monitor Service


Step 2: Configure the DHCP Server

Designate a node from the drop-down

menu to be the DHCP server.

Option 150 specifies the IP addresses of the TFTP servers to the phones.

All other required entries default to 0.


Step 3: Configure the DHCP Subnet

Choose the DHCP server.

Configure subnet number and primary address range to be

provided to the phones.

Configure secondary address range as necessary (useful if you have a block of reserved

addresses to exclude between primary and secondary range).


DHCP Migration Considerations

When upgrading from Cisco Unified CM Release 4.x to 6.0: No migration provided from Windows 2000-based DHCP

configuration to appliance-based DHCP configuration

Reprovisioning of the DHCP service required

– Using Cisco Unified Communications Manager Release 6.0 server

– Using the DHCP Server feature on the Cisco IOS router or switch

– Use third-party DHCP servers


DNS Reliance of IP Phones


IP vs. DNS Considerations

Cisco Unified Communications Manager Release 6.0 can use DNS names (default) or IP addresses for system addressing.

Advantages of using IP addresses Advantages of using DNS

Does not require a DNS server Simplifies management because of the

use of names instead of numbers

Prevents the IP telephony network from failing if the IP phones lose connection to

the DNS server

Easier IP address changes because of name-based IP paths

Decreases the amount of time required when a device attempts to contact the

Cisco Unified CM server Server to IP phone NAT possible

Simplifies troubleshooting


Before sending packets, IP phones will query the DNS server to resolve the IP address of the Cisco Unifed CM server.

IP Phone A

2) Signaling Protocol

3) RTP Media Path


IP Phone B

DNS Server

1) DNS Query/Response

1) DNS Query/Response

SCCP Call Flow with DNS


IP Phone A


2) RTP Media Path


IP Phone B

No extra step (DNS lookup).

Higher availability (no dependency on the DNS server).

The recommendation is to remove the DNS reliance.

SCCP Call Flow Without DNS


Removing DNS Reliance

Enables Cisco IP phones and other devices controlled by Cisco Unified CM to contact the Cisco Unified CM without resolving a DNS name

1. In Cisco Unified CM Administration, choose System > Server. The Find and List Servers window appears.

2. Click on a server name. The Server Configuration window appears.

3. Replace the hostname and enter the IP address of the server in the Host Name/IP Address field. Click Save.


Cisco Unified Communications Manager Network and Feature Services


Network and Features Services

Network Services Feature Services

Services required for the Cisco Unified CM system to function; for example,

database and platform services.

Services that enable certain Cisco Unified CM application features; for example, TFTP, call processing, or

serviceability reports.

Automatically activated after Cisco Unified CM installation. Cannot be

activated or deactivated.

Must be activated manually using Unified CM Serviceability > Service

Activation.

Use Unified CM Serviceability > Control Center > Network Services to

stop, start, or restart services.

Use Unified CM Serviceability > Control Center > Feature Services to

stop, start, or restart services.


Network Services

Categorized into the following groups: Performance and monitoring services: Cisco CallManager Serviceability RTMT, Cisco

RTMT Reporter Servlet, etc.

Backup and restore services: Cisco DRF Master and Cisco DRF Local

System services: Cisco CallManager Serviceability, Cisco CDP, Cisco Trace Collection tool, etc.

Platform services: Cisco DB, Cisco Tomcat, SNMP master agent, etc.

DB services: Cisco Database Layer Monitor

SOAP services: SOAP-Real-Time Service APIs, etc.

CM services: Cisco CallManager Personal Directory, Cisco Extension Mobility Application, Cisco CallManager, and Cisco IP Phone Services

CDR services: Cisco CDR Repository Manager and CDR Agent

Admin services: Cisco CallManager administration


Feature Services

Categorized into the following groups: Database and admin services: Cisco AXL Web Service, Cisco Bulk Provisioning

Service, Cisco TAPS Service Performance and monitoring services: Cisco Serviceability Reporter, Cisco

CallManager SNMP Service CM services: Cisco CallManager, Cisco TFTP, Cisco CTIManager, Cisco Extension

Mobility, etc. CTI services: Cisco CallManager Attendant Console Server, Cisco IP Manager

Assistant, Cisco WebDialer Web Service CDR services: Cisco SOAP–CDRonDemand Service,Cisco CAR Scheduler, Cisco

CAR Web Service Security services: Cisco CTL Provider, Cisco Certificate Authority Proxy Function Directory services: Cisco DirSync Voice Quality Reporter services: Cisco Extended Functions


Service Activation

To enable Cisco Unified Communications Manager Release 6.0 feature services, perform the following tasks: Access Cisco Unified CM Serviceability.

Go to Tools > Service Activation.

Select your server.

Enable the necessary services.

Go to Tools > Control Center – Feature Services and select your server.

Verify that the configured services are up and running.


Service Activation Screenshot

Optional: Select default services based on a single-server configuration

4. Save and perform settings.

2. Select the services that should be activated.

3. Deselect the services that should be deactivated.

1. Select the server.

5. Go to Control Center – Feature Services page.


Activation statusCurrent status

Start, stop, restart, and refresh selected service.

Select service to start, stop, or restart.

Service start time and up time

Control Center Screenshot


Cisco Unified Communications Manager Enterprise Parameters


Enterprise Parameters

Used to define cluster-wide system settings.

Apply to all devices and services in the same cluster.

After installation, enterprise parameters are used to set initial values of device defaults.

Only change if you fully understand the feature that you are changing or if instructed to do so by Cisco TAC.


Example of Enterprise Parameters

Parameter Description Default value

Auto Registration Phone Protocol

Specifies the protocol with which autoregistered phones should boot during initialization.

SCCP

Enable Dependency Records

Determines whether to display dependency records.

False

CCMUser Parameters

These parameters are used to display or hide certain user-configurable settings from the CCMUser web page.

n/a

Phone URL Parameters

URLs for IP phone authentication, directory button, Services button, etc.

Hostnames are used instead of IP addresses

User Search Limit

This parameter specifies the maximum number of users to be retrieved from a search in the Corporate Directory feature on the phone.

64


Changing Enterprise Parameters

1. From Cisco Unified Communications Manager Administration page, choose System > Enterprise Parameters.

2. Update the appropriate parameter settings.

To view the description of a particular enterprise parameter, click the parameter name.

To view the descriptions of all the enterprise parameters, click the ? button.

3. To save the changes, click Save.


Enterprise Parameter Screenshot

1. Select the new setting.

Default setting

2. Save the changes.


Phone URL Enterprise Parameters

When removing DNS reliance, change all hostnames in URLs to IP addresses.


Cisco Unified Communications Manager Service Parameters


Service Parameters

Service parameters for Cisco Unified Communications Manager allow you to configure parameters for different services. Examples for service parameters of the Cisco Unified Communications Manager call-processingservice are: T302 timer to speed up dialing

Enable call detail records

Define extension mobility maximum login time

Define attendant console username

Define voice media-streaming application codecs


Parameter Description Default value

CDR Enabled Flag This parameter determines whether call detail records (CDRs) are generated.

False

Station KeepAlive Interval

This parameter designates the interval between KeepAlive messages sent from Cisco IP phones to the primary Unified CM.

30s

T302 Timer This parameter specifies an interdigit timer for sending the SETUP ACK message. When this timer expires, Cisco Unified CM routes the dialed digits.

15s

Automated Alternate Routing Enable

This parameter determines whether to use automated alternate routing when the system does not have enough bandwidth.

False

Change B-Channel Maintenance Status (Click Advanced button first.)

This parameter allows Cisco Unified CM to change individual B-Channel maintenance status for PRI and CAS interfaces in real time for troubleshooting.

n/a

Example of Service Parameters


Changing Service Parameters

1. From Cisco Unified CM Administration page, choose System > Service Parameters.

2. Select the Server and choose the Service.

3. Update the appropriate parameter settings.

If you cannot find the parameter, click the Advanced button to display hidden parameters.

4. To save the changes, click Save.


Service Parameter Configuration Screenshot

Select server.

Select service.


CallManager Service Parameters Screenshot

Verify/configure service settings

1. Select the new setting.

Default setting

2. Save the changes.

Optional: Click Advanced to show hidden service parameters.


Summary

Cisco Unified Communications Manager initial configuration includes network configuration, activation of feature services, and enterprise and service parameter configuration.

Cisco Unified Communications Manager network configuration options include NTP configuration, DHCP server configuration, and using DNS versus IP addresses.

The Cisco Unified Communications Manager DHCP service is designed to serve IP phones.

In order to avoid DNS reliance of IP phones, change hostnames to IP addresses.

Network services are automatically activated, while Feature services are activated by the Cisco Unified Communications Manager administrator.

Enterprise parameters are used to define cluster-wide system settings. Service parameters are used to configure parameters of specific services.

Administering Cisco Unified Communications Manager

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