Cisco CRS Carrier Routing System Multishelf System Interconnection and Cabling Guide
Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet Cards
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Cabling the Control Network Using 22-Port Shelf Controller Gigabit Ethernet Cards

Table Of Contents

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

Control Network Cabling

Prerequisites

Connections for a Single-FCC System

Connections for a Two-FCC System

Connections for a Four-FCC System

Mesh Cabling (Four-FCC System)

What to Do Next


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


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


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


Control Network Cabling

This section describes cabling assignments for various multishelf system configurations. The following sub-sections are included:

Connections for a Single-FCC System

Connections for a Two-FCC System

Connections for a Four-FCC System

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


Caution A multishelf system will operate with only one 22-port SCGE card installed, but Cisco strongly suggests using 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.

Note the following connection tips:

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

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


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

Prerequisites

Before cabling the system, install each line card chassis (LCC) and fabric card chassis (FCC) in the planned 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

Connections for a Single-FCC System

Figure 3-1 shows the cabling scheme for a single-FCC system. Table 3-1 lists the cabling connections that must be completed between the RPs and the 22-port SCGE cards and Table 3-2 lists the mesh connection in a single-FCC system.

Figure 3-1 Connections Within a Single-FCC Multishelf System

Note that, while Figure 3-1 describes a two-LCC multishelf system, up to eight LCCs can be added to a single FCC multishelf system. The same level of expansion is possible in a two- or four-FCC multishelf system even though Figure 3-3 and Figure 3-5 show two LCCs. Table 3-1 and Table 3-3 map out eight LCCs.

Table 3-1 RP to 22-Port SCGE Card Connections (Single-FCC System) 

From Chassis
From RP Port
To 22-Port SCGE Card Number
To 22-Port SCGE Card Port Number

LCC0

RP0, Cntl Eth 0

SC0

GE0

RP0, Cntl Eth 1

SC1

GE0

RP1, Cntl Eth 0

SC0

GE1

RP1, Cntl Eth 1

SC1

GE1

LCC1

RP0, Cntl Eth 0

SC0

GE2

RP0, Cntl Eth 1

SC1

GE2

RP1, Cntl Eth 0

SC0

GE3

RP1, Cntl Eth 1

SC1

GE3

LCC2

RP0, Cntl Eth 0

SC0

GE4

RP0, Cntl Eth 1

SC1

GE4

RP1, Cntl Eth 0

SC0

GE5

RP1, Cntl Eth 1

SC1

GE5

LCC3

RP0, Cntl Eth 0

SC0

GE6

RP0, Cntl Eth 1

SC1

GE6

RP1, Cntl Eth 0

SC0

GE7

RP1, Cntl Eth 1

SC1

GE7

LCC4

RP0, Cntl Eth 0

SC0

GE8

RP0, Cntl Eth 1

SC1

GE8

RP1, Cntl Eth 0

SC0

GE9

RP1, Cntl Eth 1

SC1

GE9

LCC5

RP0, Cntl Eth 0

SC0

GE10

RP0, Cntl Eth 1

SC1

GE10

RP1, Cntl Eth 0

SC0

GE11

RP1, Cntl Eth 1

SC1

GE11

LCC6

RP0, Cntl Eth 0

SC0

GE12

RP0, Cntl Eth 1

SC1

GE12

RP1, Cntl Eth 0

SC0

GE13

RP1, Cntl Eth 1

SC1

GE13

LCC7

RP0, Cntl Eth 0

SC0

GE14

RP0, Cntl Eth 1

SC1

GE14

RP1, Cntl Eth 0

SC0

GE15

RP1, Cntl Eth 1

SC1

GE15


Table 3-2 Mesh Connections (Single-FCC System)

Originating Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number
Destination Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number

FCC0

SC0

GE21

FCC1

SC1

GE21


Connections for a Two-FCC System

Figure 3-2 shows the cabling scheme for a two-FCC system. Table 3-3 lists the cabling connections that must be completed between the RPs and the 22-port SCGE cards and Table 3-4 lists the mesh cabling connections in a two-FCC system.

Figure 3-2 Connections Within a Two-FCC Multishelf System

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

From Chassis
From RP Port
FCC
To 22-Port SCGE Card Number
To 22-Port SCGE Card Port Number

LCC0

RP0, Cntl Eth 0

FCC0

SC0

GE0

RP0, Cntl Eth 1

FCC1

SC0

GE0

RP1, Cntl Eth 0

FCC0

SC1

GE0

RP1, Cntl Eth 1

FCC1

SC1

GE0

LCC1

RP0, Cntl Eth 0

FCC0

SC0

GE1

RP0, Cntl Eth 1

FCC1

SC0

GE1

RP1, Cntl Eth 0

FCC0

SC1

GE1

RP1, Cntl Eth 1

FCC1

SC1

GE1

LCC2

RP0, Cntl Eth 0

FCC0

SC0

GE2

RP0, Cntl Eth 1

FCC1

SC0

GE2

RP1, Cntl Eth 0

FCC0

SC1

GE2

RP1, Cntl Eth 1

FCC1

SC1

GE2

LCC3

RP0, Cntl Eth 0

FCC0

SC0

GE3

RP0, Cntl Eth 1

FCC1

SC0

GE3

RP1, Cntl Eth 0

FCC0

SC1

GE3

RP1, Cntl Eth 1

FCC1

SC1

GE3

LCC4

RP0, Cntl Eth 0

FCC0

SC0

GE4

RP0, Cntl Eth 1

FCC1

SC0

GE4

RP1, Cntl Eth 0

FCC0

SC1

GE4

RP1, Cntl Eth 1

FCC1

SC1

GE4

LCC5

RP0, Cntl Eth 0

FCC0

SC0

GE5

RP0, Cntl Eth 1

FCC1

SC0

GE5

RP1, Cntl Eth 0

FCC0

SC1

GE5

RP1, Cntl Eth 1

FCC1

SC1

GE5

LCC6

RP0, Cntl Eth 0

FCC0

SC0

GE6

RP0, Cntl Eth 1

FCC1

SC0

GE6

RP1, Cntl Eth 0

FCC0

SC1

GE6

RP1, Cntl Eth 1

FCC1

SC1

GE6

LCC7

RP0, Cntl Eth 0

FCC0

SC0

GE7

RP0, Cntl Eth 1

FCC1

SC0

GE7

RP1, Cntl Eth 0

FCC0

SC1

GE7

RP1, Cntl Eth 1

FCC1

SC1

GE7


Table 3-4 Mesh Connections (two-FCC System)

Originating Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number
Destination Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number

FCC0

SC0

GE19

FCC0

SC1

GE19

FCC1

SC0

GE19

FCC1

SC1

GE19

FCC0

SC0

GE20

FCC1

SC0

GE20

FCC0

SC1

GE20

FCC1

SC1

GE20

FCC0

SC0

GE21

FCC1

SC1

GE21

FCC0

SC1

GE21

FCC1

SC0

GE21


Connections for a Four-FCC System

Figure 3-3 shows the cabling scheme for a four-FCC system, but unlike Figure 3-1 and Figure 3-2, does not show the mesh cabling connections in a four-FCC system. Refer to Figure 3-4 for an illustration of the mesh cabling connections in a four-FCC system. Table 3-5 lists the cabling connections that must be completed between the RPs and the 22-port SCGE cards. Table 3-6 lists the mesh cabling connections in a four-FCC system.

Figure 3-3 Connections Within a Four-FCC Multishelf System

Table 3-5 RP to 22-Port SCGE Card Connections (Four-FCC System)

From Chassis
From RP Port
FCC
To 22-Port SCGE Card Number
To 22-Port SCGE Card Port Number

LCC0

RP0, Cntl Eth 0

FCC0

SC0

GE0

RP0, Cntl Eth 1

FCC1

SC1

GE0

RP1, Cntl Eth 0

FCC2

SC0

GE0

RP1, Cntl Eth 1

FCC3

SC1

GE0

LCC1

RP0, Cntl Eth 0

FCC1

SC0

GE0

RP0, Cntl Eth 1

FCC0

SC1

GE0

RP1, Cntl Eth 0

FCC3

SC0

GE0

RP1, Cntl Eth 1

FCC2

SC1

GE0

LCC2

RP0, Cntl Eth 0

FCC0

SC0

GE1

RP0, Cntl Eth 1

FCC1

SC1

GE1

RP1, Cntl Eth 0

FCC2

SC0

GE1

RP1, Cntl Eth 1

FCC3

SC1

GE1

LCC3

RP0, Cntl Eth 0

FCC1

SC0

GE1

RP0, Cntl Eth 1

FCC0

SC1

GE1

RP1, Cntl Eth 0

FCC3

SC0

GE1

RP1, Cntl Eth 1

FCC2

SC1

GE1

LCC4

RP0, Cntl Eth 0

FCC0

SC0

GE2

RP0, Cntl Eth 1

FCC1

SC1

GE2

RP1, Cntl Eth 0

FCC2

SC0

GE2

RP1, Cntl Eth 1

FCC3

SC1

GE2

LCC5

RP0, Cntl Eth 0

FCC1

SC0

GE2

RP0, Cntl Eth 1

FCC0

SC1

GE2

RP1, Cntl Eth 0

FCC3

SC0

GE2

RP1, Cntl Eth 1

FCC2

SC1

GE2

LCC6

RP0, Cntl Eth 0

FCC0

SC0

GE3

RP0, Cntl Eth 1

FCC1

SC1

GE3

RP1, Cntl Eth 0

FCC2

SC0

GE3

RP1, Cntl Eth 1

FCC3

SC1

GE3

LCC7

RP0, Cntl Eth 0

FCC1

SC0

GE3

RP0, Cntl Eth 1

FCC0

SC1

GE3

RP1, Cntl Eth 0

FCC3

SC0

GE3

RP1, Cntl Eth 1

FCC2

SC1

GE3


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 connected to each other in a full mesh configuration. This provides a great amount of redundancy, so in the event that one of the nodes fails, network traffic is directed to any of the other nodes. Figure 3-4 shows a graphical view of the full mesh configuration.

Figure 3-4 Mesh Cabling Diagram (Four-FCC System)

Table 3-6 Mesh Connections (Four-FCC System) 

Originating Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number
Destination Chassis
22-Port SCGE Card Number
22-Port SCGE Card Port Number

FCC0

SC0

GE21

FCC0

SC1

GE21

SC0

GE15

FCC1

SC0

GE15

SC0

GE16

FCC1

SC1

GE15

SC0

GE17

FCC2

SC0

GE15

SC0

GE18

FCC2

SC1

GE15

SC0

GE19

FCC3

SC0

GE15

SC0

GE20

FCC3

SC1

GE15

FCC0

SC1

GE15

FCC1

SC0

GE16

SC1

GE16

FCC1

SC1

GE16

SC1

GE17

FCC2

SC0

GE16

SC1

GE18

FCC2

SC1

GE16

SC1

GE19

FCC3

SC0

GE16

SC1

GE20

FCC3

SC1

GE16

FCC1

SC0

GE21

FCC1

SC1

GE21

SC0

GE17

FCC2

SC0

GE17

SC0

GE18

FCC2

SC1

GE17

SC0

GE19

FCC3

SC0

GE17

SC0

GE20

FCC3

SC1

GE17

FCC1

SC1

GE17

FCC2

SC0

GE18

SC1

GE18

FCC2

SC1

GE18

SC1

GE19

FCC3

SC0

GE18

SC1

GE20

FCC3

SC1

GE18

FCC2

SC0

GE21

FCC2

SC1

GE21

SC0

GE19

FCC3

SC0

GE19

SC0

GE20

FCC3

SC1

GE19

FCC2

SC1

GE19

FCC3

SC0

GE20

SC1

GE20

FCC3

SC1

GE20

FCC3

SC0

GE21

FCC3

SC1

GE21


What to Do Next

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

The final step in cabling the multishelf system is to cable the system fabric, as described in Chapter 4 "Cabling the Fabric."