The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
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. |
This section describes cabling assignments for various multishelf system configurations. The following sub-sections are included:
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:
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. |
For information on installing the LCCs and FCCs, see the following documents:
The figure below shows the cabling scheme for a single-FCC system. The table below lists the cabling connections that must be completed between the RPs and the 22-port SCGE cards and Table 2 lists the mesh connection in a single-FCC 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.
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 |
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 |
The figure below shows the cabling scheme for a two-FCC system. The below table lists the cabling connections that must be completed between the RPs and the 22-port SCGE cards and Table 2 lists the mesh cabling connections in a 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 |
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 |
The figure below shows the cabling scheme for a four-FCC system, but unlike Table 1 and Table 2, does not show the mesh cabling connections in a four-FCC system. Refer to Mesh Cabling (Four-FCC System), 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 1 lists the mesh cabling connections in a 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 |
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. The figure below shows a graphical view of the full mesh configuration.
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 |
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 Cabling the Fabric chapter.