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Open Caveats

Release Notes for Cisco Service Control Operating System (SCOS) 2.5.10

OL-7085-08

SCE Platform may Fail during Upgrade of a Cascaded System

During the upgrade of a pair cascaded SCE platforms, one of the SCE platforms may

experience three consecutive reboots, causing a failure of the platform. The reboots are due to

the fact that at some point during the upgrade, the two cascaded SCE platforms are each

running a different version of SCOS, which results in RPC protocol incompatibility between

the two SCE platforms.

The following procedure should be used for upgrading a cascaded system with SCOS versions

lower than 2.5.7 (either old or new).

Note

This issue is resolved in SCOS 2.5.7, and the upgrade procedure for cascaded systems that is

documented in the Cisco Service Control Engine Software Configuration Guide can be used.

SOLUTION

To upgrade a cascaded system for SCOS 2.5.6 or lower, use the following procedure:

Step 1. Shutdown both SCE platforms by running the following commands:

SCE# configure

SCE (config)# interface linecard 0

SCE (config if)# shutdown

Step 2. Change connection mode for both boxes to 'inline' rather than 'inline-cascade’. This prevents

inter connection communication between the two SCE platforms, thus preventing the original

problem.

SCE (config if)# connection-mode inline

Step 3. Upgrade both SCE platforms independently as described in the Cisco Service Control Engine

Software Configuration Guide.

Step 4. Reload both SCE platforms.

Step 5. Change connection mode for both boxes back to 'inline-cascade’.

SCE (config if)# connection-mode inline-cascade

Step 6. Verify that communication between the two SCE platforms has been re-established.

Step 7. Activate both SCE platforms using the following command:

SCE (config if)# no shutdown

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Cisco SCE 2000 4/8xFE Manual de usuario Pagina 26