[c-nsp] Freezing counters at 6500

[Kevin Loch]

Grzegorz Janoszka wrote:
> 
> Hi,
> 
> We have several 6500's, some of them heavily loaded. We use snmp to 
> graph traffic on all interfaces - just the simplest solution. Since some 
> time we have had an issue with the interface counters. When the CPU box 
> is really loaded (usually synchronization of BGP sessions), the counters 
> just freeze. The important thing is that only the displaying freezes, 
> the counters are still counting. Both snmp and 'show interface' data is 
> frozen and does not update for various time - from 30 seconds to 3-4 
> minutes. As the result we have spikes on graphs - there is always spike 
> down, when snmp gives frozen data from the past, and after that spike 
> up, when the counters unlock and start displaying correct data.

Try adjusting 'service counters max age' to zero if you haven't already.
As others have pointed out a delay of 3-4 minutes is not normal
What does your SP (not RP) cpu usage look like?  Try disabling netflow
if your SP cpu usage is maxing out.

- Kevin