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
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