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Cisco CRS-1 Carrier Routing System Multishelf System Upgrade and Conversion Guide
OL-12571-01
Chapter1 Upg rading to a Multishelf System
How to Upgrade to a Multishelf System
Upgrading the Fabric Cards and Adding an FCC
This section describes how to upgrade the fabric cards in a single-chassis system and establish
communications between the designated shelf controller (DSC) LCC and one or mo re FCCs.

Prerequisites

Software Requirements
•Cisco IOS XR Software Release 3.4.0 or later
•ROMMON 1.42 or later
Caution The ROM Monitor software must be upgraded to version 1.42 or higher on all RPs before a Cisco CRS-1
system is upgraded to Cisco IOS XR Software Release 3.4.0 or higher release. If the router is brought
up with an incompatible version of the ROM Monitor software , then the standby RP may fail to boot.
For instructions to overcome a boot block in the standby RP in a single chassi s system, see Cisco IOS XR
ROM Monitor Guide. If a boot block occurs in a multishelf system, contact your Cisco Syste ms support
representative for assistance. See Obtaining Technical Assistance, page viii.
In addition, Cisco CRS-1 Multishelf systems should be upgraded to ROMMON release 1.42 before being
upgraded to IOS XR Release 3.4.0 to ensure R Ps are assigned the correct rack numbers during system
boot.
For more information, see Cisco IOS XR ROM Monitor Guide.
Hardware Requirements
•The system hardware should be prepared as described in the “Prerequisites for Upgrading to a
Multishelf System” section on page 1-1.
•The control network must be set up as described in the “Prerequisites for Upgrad ing to a Multishelf
System” section on page1-1.
•The power should be off for the FCCs and any additional LCCs.

Restrictions

None.

SUMMARY STEPS

1. admin
2. configure
3. dsc serial serialNumber rack 0
4. dsc serial serialNumber rack Frack
5. controllers fabric plane planeNumber
oim count 1
oim instance 0 location Frack/slot/FM
6. commit
7. end