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CSCud17778 - memory leak in middle buffers due to snmp traps

The bug details list these as the conditions required to cause the symptom.  They don't specify whether these three conditions are an AND or an OR, but I'm assuming that all three must be satisfied:


1) more than one snmp-server hosts are configured

2) "snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart" command is configured

3) some host sending broadcast SNMP traps

What I'm confused about is #3 -- how would that be germane?  If some "host" sends SNMP traps to an IP broadcast address, the switch should ignore them because it will not be listening on UDP port 162.  If instead of SNMP traps, the host were broadcasting SNMP GETs, that would make it as far as the community string check, which would require buffer storage for the switch SNMP process.  And assuming that check failed, the generation of an authentication_failed trap to multiple trap receivers would require more buffers.

Can anyone (especially from the TAC) clarify this?


- Marty

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CSCud17778 - memory leak in middle buffers due to snmp traps

Hi Marty,

Yes, all 3 are required (AND conditions).

Also note for #2, it is really the "authentication" portion of the command.

In this case, I believe the IOS devices is actually looking / listening to these received traps.  The receipt of this SNMP trap is definately a required condition to trigger this bug.