Cabling the Control Network Using 22-Port Shelf Controller ......SC1 GE20 FCC3 SC1 GE20 FCC3 SC0...

Cabling the Control Network Using 22-Port ShelfController Gigabit Ethernet Cards

• Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet Cards, page 1

Cabling the Control Network Using 22-Port Shelf ControllerGigabit Ethernet Cards

This chapter describes how to connect cables between two 22-port SCGE cards and the other components ofa multishelf system. These connections establish control network connectivity for the multishelf system.

These procedures are for a newmultishelf system installation. If you are converting a Cisco Catalyst-basedcontrol network over to a 22-port SCGE card control network, see the Cisco CRS Carrier Routing SystemMultishelf System Upgrade and Conversion Guide.

Note

Control Network CablingThis section describes cabling assignments for various multishelf system configurations. The followingsub-sections are included:

The multishelf system is connected between LCC and FCC with four paths per LCC (two per each RPconnection). Each of the two paths have Gigabit Ethernet (GE) connections (on each RP) that are connectedto two connections on each GE (on the 22-port SCGE cards) in the FCCs. The 22-port SCGE card providesthe GE path, or control Ethernet network, between all chassis.

A multishelf system will operate with only one 22-port SCGE card installed, but Cisco strongly suggestsusing two cards for redundancy. If you operate the multishelf system with a single card and that card fails,the multishelf system has no control network connectivity and the router fails.

Caution

Note the following connection tips:

Cisco CRS Carrier Routing System Multishelf System Interconnection and Cabling Guide 1

• Any GE ports can be used, in any sequence, but we suggest using ports in sequence as a convention toenable easier maintenance.

• SCGE0 is the 22-port SCGE card in the FCC upper card cage. SCGE1 is the 22-port SCGE card in theFCC lower card cage.

Do not remove the plugs from the GE optical bores or the fiber-optic cable until you are ready to connectthe cable. The plugs protect the bores and cable from contamination.

Caution

Prerequisites• Before cabling the system, install each line card chassis (LCC) and fabric card chassis (FCC) in theplanned location.

For information on installing the LCCs and FCCs, see the following documents:

• Cisco CRS Carrier Routing System Fabric Card Chassis Installation Guide◦

◦Cisco CRS Carrier Routing System 16-Slot Line Card Chassis Installation Guide

• All connections are made using single-mode LC to LC fiber cables.

• Determine the required amount of cabling based on the configuration in use:

◦Single-FCC system requires 9 cables—8 RP to SCGE cables and 1 mesh cable

◦Two-FCC system requires 14 cables—8 RP to SCGE cables and 6 mesh cables

◦Four-FCC system requires 36 cables—8 RP to SCGE cables and 28 mesh cables

Cisco CRS Carrier Routing System Multishelf System Interconnection and Cabling Guide2

Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet CardsControl Network Cabling

Connections for a Single-FCC SystemThe figure below shows the cabling scheme for a single-FCC system. The table below lists the cablingconnections that must be completed between the RPs and the 22-port SCGE cards and Table 2: MeshConnections (Single-FCC System), on page 5 lists the mesh connection in a single-FCC system.

Figure 1: Connections Within a Single-FCC Multishelf System

Note that, while Figure 3-1 describes a two-LCCmultishelf system, up to eight LCCs can be added to a singleFCCmultishelf system. The same level of expansion is possible in a two- or four-FCCmultishelf system eventhough Figure 3-3 and Figure 3-5 show two LCCs. Table 3-1 and Table 3-3 map out eight LCCs.

Table 1: RP to 22-Port SCGE Card Connections (Single-FCC System)

To 22-Port SCGE CardPort Number

To 22-Port SCGE CardNumber

From RP PortFrom Chassis

GE0SC0RP0, Cntl Eth 0LCC0

GE0SC1RP0, Cntl Eth 1









Table 2: Mesh Connections (Single-FCC System)

22-Port SCGE CardPort Number

22-Port SCGE CardNumber

Destination Chassis22-Port SCGE CardPort Number


Originating Chassis

GE21SC1FCC1GE21SC0FCC0

Connections for a Two-FCC SystemThe figure below shows the cabling scheme for a two-FCC system. The below table lists the cabling connectionsthat must be completed between the RPs and the 22-port SCGE cards and Table 4:Mesh Connections (two-FCCSystem), on page 7 lists the mesh cabling connections in a two-FCC system.

Figure 2: Connections Within a Two-FCC Multishelf System



Table 3: RP to 22-Port SCGE Card Connections (Two-FCC System)

To 22-Port SCGECardPort Number

To 22-Port SCGECardNumber

FCCFrom RP PortFrom Chassis

GE0SC0FCC0RP0, Cntl Eth 0LCC0

GE0SC0FCC1RP0, Cntl Eth 1

































Table 4: Mesh Connections (two-FCC System)

22-Port SCGECard Port Number

22-Port SCGECard Number

DestinationChassis22-Port SCGECard Port Number

22-Port SCGECard Number

OriginatingChassis







Connections for a Four-FCC SystemThe figure below shows the cabling scheme for a four-FCC system, but unlike Table 1: RP to 22-Port SCGECard Connections (Single-FCC System) , on page 3 and Table 2: Mesh Connections (Single-FCC System),on page 5, does not show the mesh cabling connections in a four-FCC system. Refer to Mesh Cabling(Four-FCC System), on page 10, cabling connections in a four-FCC system. The table below lists the cabling



connections that must be completed between the RPs and the 22-port SCGE cards. Table 6:Mesh Connections(Four-FCC System) , on page 10 lists the mesh cabling connections in a four-FCC system.

Figure 3: Connections Within a Four-FCC Multishelf System

Table 5: RP to 22-Port SCGE Card Connections (Four-FCC System)

To 22-Port SCGECardPort Number

To 22-Port SCGECard Number

FCCFrom RP PortFrom Chassis











Mesh Cabling (Four-FCC System)

To complete the cabling of a four-FCC system, all of the 22-port SCGE cards in the FCCs must be connectedto each other in a full mesh configuration. This provides a great amount of redundancy, so in the event thatone of the nodes fails, network traffic is directed to any of the other nodes. The figure below shows a graphicalview of the full mesh configuration.

Figure 4: Mesh Cabling Diagram (Four-FCC System)

Table 6: Mesh Connections (Four-FCC System)

22-Port SCGE CardPort Number


Destination Chassis22-Port SCGE CardPort Number


Originating Chassis


GE15SC0FCC1GE15SC0

GE15SC1FCC1GE16SC0

GE15SC0FCC2GE17SC0

GE15SC1FCC2GE18SC0

GE15SC0FCC3GE19SC0

GE15SC1FCC3GE20SC0




GE16SC1FCC1GE16SC1

GE16SC0FCC2GE17SC1

GE16SC1FCC2GE18SC1

GE16SC0FCC3GE19SC1

GE16SC1FCC3GE20SC1


GE17SC0FCC2GE17SC0

GE17SC1FCC2GE18SC0

GE17SC0FCC3GE19SC0

GE17SC1FCC3GE20SC0


GE18SC1FCC2GE18SC1

GE18SC0FCC3GE19SC1

GE18SC1FCC3GE20SC1


GE19SC0FCC3GE19SC0

GE19SC1FCC3GE20SC0


GE20SC1FCC3GE20SC1


What to Do NextAfter you cable the control network, configure the 22-port SCGE cards, as described in Cisco IOS XR GettingStarted Guide . The control network must be brought up to enable communications between the racks and tosupport software downloads from the DSC rack to the other racks.


Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet CardsWhat to Do Next

The final step in cabling the multishelf system is to cable the system fabric, as described inCabling the Fabricchapter.


Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet CardsWhat to Do Next

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