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Cisco Bug: CSCuo26294 - Switch Crash in FFM Process After 1 Billion AOM Updates

Last Modified

Sep 12, 2020

Products (1)

  • Cisco Catalyst 4000 Series Switches

Known Affected Releases

15.1(2)SG3.0.151

Description (partial)

Symptom:
If a switch is online long enough to process 1 billion AOM updates, the "FFM" process may crash. Eg:

  hap_sup_reset: Reason Code:[2] Reset Reason:Service [ffm] pid:[4586] terminated abnormally [6].

"AOM" (Asynchronous Object Manager) is a mechanism often used for delivering programming updates between software processes that have a role in packet forwarding operations. "FFM" (Forwarding and Feature Manager) is an example of one such process that can handle AOM objects.

Conditions:
The issue happens when a software counter goes beyond about 1 billion (2^30) hitting the limit of what its datatype can handle.

The issue is often seen with multicast updates triggering AOM objects to update. 

The rate at which this issue can be encountered is highly dependent on the network and how often AOM updates need to happen internally. However, generally speaking, this issue can be encountered in several months of years of uptime.

Related Community Discussions

Converged Access - 3.3.4 Beta Available
Download link On 8-15-2014, interim build 3.14.30EZP was posted at https://upload.cisco.com/cgi-bin/swc/fileexg/main.cgi?CONTYPES=WNG under Forum: Unified Access EFT   Support For any new issues while testing this code, please report to 5760-mr4-feedback@external.cisco.com   Images ct5760* is for 5760 wireless controller cat3k* is for Catalyst 3850 and 3650 converged access switches   Issues fixed on this Release   Bug Id Bug Headline CSCum91301 IPDT: Standby crashes due to host table corruption ...
Latest activity: Aug 29, 2014
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