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Cisco Bug: CSCvi55399 - FIB Space limit reached, Some IPv6 Multicast routes may be absent from hardware tables

Last Modified

Apr 30, 2018

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

15.4(1.2.85)SY1

Description (partial)

Symptom:
Error message generated on specific C6800 linecards:
MLSCEF-xxx-4-FIB_SPACE_LIMIT: FIB Space limit reached, Some IPv6 Multicast routes may be absent from hardware tables

Conditions:
issue is observed only when all below conditions are met:
1) there is enough space in CEF TCAM. To check current utilization execute:
#show platform hardware cef maximum-routes usage

2) error message is generated for IPv6 Multicast: 

3) error is generated on the module which have specific CEF TCAM Type: 
#show platform hardware cef hardware | i CEF TCAM
  CEF TCAM REV: 0x1010303, type: Spanslogic TCAM
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