[c-nsp] Snmp monitoring of 10GigE Interfaces

[Rhett Bassett]

Kumar Dasari wrote:
> I am having rather erratic and inconsistent results for bandwidth usage reports from different SNMP software packages (MRTG, Cacti, Solarwinds etc) when monitoring 10GigE interfaces on Cisco 7609 Routers. For example there is discripency in what the snmp software says what the 5 min bps output rate is, and what the show int te1/1 shows on the router itself. Software is lower always. Any suggestions on how I can fix this?

Increase your sample rate - you're probably hitting the SNMP counter
rollover.

Quoth the Cricket manual
(http://cricket.sourceforge.net/support/doc/reference.html): "an SNMP
Counter32 can wrap in under 5 minutes at bandwidths above 100 Mbits,
it's critical to fetch the data more often, or else RRD will not be able
to correctly detect and process the counter wrap".

-- 
Rhett Bassett
Research and Development Lead
Hunter Communications
541.734.2800 x2117
http://www.coreds.net