Field Notice: FN - 62243 - IOS 12.0(31)S Causes Cisco 12000 to Crash on Bootup When Three or More Fully Loaded Engine5 SPA Carrier Cards are Installed

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Updated:November 23, 2005
Document ID:FN62243

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Revised November 23, 2005

November 2, 2005

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected

Products Affected

Comments

12.0(31)S

Only Cisco 12000 PRP Releases

12.0(31)S1

Only Cisco 12000 PRP Releases

12.0(31)S1a

Only Cisco 12000 PRP Releases

Problem Description

With IOS release 12.0(31)S, 31S1 or 31S1a loaded on a Cisco 12000 PRP or GRP-B route processors the router may crash when:

  • SFP state is changed in a SPA based line cards and there are COS stats messages being sent to the PRP from other Engine 4/4+ or 6 line cards at the same time.

  • When a combination of Engine5 and Engine 4/4+/6 line cards are installed into the Cisco 12000 router and there is a line card reload, route processor switchover or route processor reload.

Background

There are two root causes for this problem.

  • SFP state change notification processing by the route processor is blocking all other IPC message processing.

  • The active route processor is getting too many COS stats messages from Engine 4/4+/6 line cards.

A software fix for this problem has been integrated into IOS releases 12.0(31)S2 and later. This fix changes the way RPs handle SFP state change processing and aggregates COS stats in Engine 4/4+/6 line cards at 10 second intervals.

Problem Symptoms

Symptoms include:

  1. Active PRP or GRP-B resets in a dual RP Cisco 12000 router.

  2. OR - In a Cisco 12000 router without dual route processors the router crashes.

Workaround/Solution

There is no software configuration work around for this problem.

To avoid and fix this problem, the IOS must be upgraded to release 12.0(31)S2 or later.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCsb17203 (registered customers only)

SPA-10X1GE stuck in booting when there is more than 1 in a dual RP setup

CSCsa93349 (registered customers only)

Cisco 12000 Router Crash on bootup, dual RP (SSO Mode), Engine5 with Engine 4/4+ or 6 Line Cards

For More Information

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