32 and 64 bits counters

acornu · Post by **acornu** » Wed Jul 08, 2009 5:59 am

HI,

Anyone had any problems having a device poll both the regular and the 64bits interface counters?

I have some switches having flexwan links (T1/DS3) and GigE links having traffic over 100Mbps.
When I mix both, none will graph.

thanks,
~Alex

BSOD2600 · Post by **BSOD2600** » Wed Jul 08, 2009 1:32 pm

64bit counters require snmpv2.

zeki · Post by **zeki** » Thu Jul 09, 2009 11:57 pm

I usually use 64bit counters for gig links and regular ones for anything else.
it graphs funky if you don't use 64bit counters for any links above a gig

geertn444 · Post by **geertn444** » Fri Jul 10, 2009 3:59 am

Do some calculations.
We have noticed that with a poll cycle of 5 minutes, any load above 114 Mbps is NOT graphed correctly with 32-bit counters because they will wrap.
So for any gigabit OR 100Mbps Etherchannel, we have converted all graphs to 64-bit counters (and SNMPv2!). Then we suddenly discovered the load on the network was actually 2-3 times higher as expected

Cacti

32 and 64 bits counters

32 and 64 bits counters

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