1-3
Cisco CRS-1 Carrier Routing System Multishelf System Upgrade and Conversion Guide
OL-12571-01
Chapter1 Upgrading to a Multishelf System
Information About Upgrading to a Multishelf System
Information About Upgrading to a Multishelf System
The difference between upgrading a single-chassis system to a multishelf system and installing a
multishelf system is the fabric upgrade. A single-chassis system uses fabric cards designed for
single-chassis systems (FC/S cards), and an LCC in a multishelf system uses fabric cards designed for a
multishelf system (FC/M cards). On a single chassis system, each fabric card represents one fabric plane.
To upgrade a single-chassis system to a multishelf system without interrupting service, you must do the
following:
1. Use CLI commands to prepare each FC/S fabric card for replacement with an FC/M card.
2. Shut down the plane on each FC/S card before it is replaced.
3. Replace the FC/S card with an FC/M card.
4. Bring up the FC/M card.
5. Repeat Step 2 through Step 4 until all planes (0 through 7) are upgraded.
When you plan to perform a single-shelf to multishelf system upgrade, consider the following:
•You need these components:
–
Fabric card chassis and new line card chassis.
–
Cisco Catalyst 6509 Switch, which provides the control Ethernet network for the multishelf
system control traffic. We highly recommend two switches for redundancy.
–
S13 cards for the original line card chassis (to replace the original S123 cards in the chassis).
–
Optical array cables (48 cables for each multishelf system and 24 cables for each line card
chassis).
–
Additional MSCs and PLIMs for the new line card chassis.
•To avoid traffic loss, you must upgrade the switch fabric one plane at a time. To do that, you must
replace each FC/S card with a new FC/M card and restore service to that fabric plane before
upgrading the next fabric plane.
•You might want to perform the upgrade during a network maintenance window or when system
traffic is light.
Note Be sure to review the upgrade procedures before deciding whe n to schedule the upgrade.
That way, you can familiarize yourself with the upgrade procedure and determine if there
are other issues to consider before performing the upgrade.
•Are there cabling issues to consider when you add the new chassis to the existing chassis?
For example, will you have to install optical chassis interconnect cables between the chassis before
you bolt the chassis to the floor? If so, be sure to protect the cables while moving the chassis.
How to Upgrade to a Multishelf System
To upgrade a single-chassis system to a multishelf system, you must complete the following tasks:
•Upgrading the Fabric Cards and Adding an FCC, page 1-4
•Adding an LCC to a Multishelf System, page 1-9