Cisco Bug: CSCsg40573 - 12.2SRA(33): MLS FIB frozen when handling aggregate label update
Jan 28, 2017
- Cisco 7600 Series Routers
Known Affected Releases
12.2(33)SRA 12.2(40.1)S 12.2SRB
Symptoms: A Cisco 7600 series may enter a state in which the FIB is frozen, and the syslog may show information similar to the following: %MLSCEF-SP-2-SANITY_FAIL: Sanity Check of MLS FIB s/w structures failed %MLSCEF-SP-2-FREEZE: hardware switching disabled on card In this frozen state the data plane is not affected, but new forwarding information does not take effect on the hardware, causing an inconsistency between MPLS or IP software forwarding and the hardware. Conditions: This symptom is observed when the TCAM information for a label or prefix and mask does not match the software version, which prevents the TCAM driver from deleting the label or prefix and mask. For example, the symptom may occur when a label is moved from one type (for example, form an aggregate label) to another other type (for example, to a non-aggregate label).
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