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Level 10
Level 10

Core issue

This message occurs when a Simple Network Management Protocol (SNMP) Manager polls for the Ternary Content Addressable Memory (TCAM) data of a line card which does not have any TCAM information. This occurs only for a line card in a Catalyst 6500 switch that runs Cisco IOS  Software. If the line card has TCAM information during the SNMP poll, the data is given to the Network Management System (NMS) for further processing.

This issue is documented in Cisco bug ID CSCec39383.


This issue is fixed in Cisco IOS Software Release 12.2(18).

As a workaround, you can block the query of TCAM data by the NMSs. The MIB object that provides TCAM usage data is cseTcamUsageTable. In order to avoid tracebacks, perform these steps on the router:

  1. Issue the snmp-server view tcamBlock cseTcamUsageTable excluded command. 

  2. Issue the snmp-server view tcamBlock iso included command. 

  3. Issue the snmp-server community public view tcamBlock ro command. 

  4. Issue the snmp-server community private view tcamBlock rw command.

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