[mrtg] Re: Wrong max speed

Pavel Ruzicka pavouk at pavouk.org
Wed Jan 18 14:05:56 MET 2006


I know about 64bit counters for data (ifHCInOctetsm ifHCOutOctets), I use
them every day, but I don't know about counter with "bandwidth" information,
which is normally IF-MIB::ifSpeed. But this counter is 32bit and it has
maximum capacity 4295.0 Mbits/s, which is not enough for 10Gbps interfaces.
I look for 64bit variant of this OID.
I can't specify MAX speed manually, because I use autogenerated configs
with cfgmaker.

Best regards,

Pavel Ruzicka

> 64bit counters do exist on most routers. To use them within MRTG you have
> to add :::::2 behind the IP-adress. See
> http://people.ee.ethz.ch/~oetiker/webtools/mrtg/cfgmaker.html and

> We have Cisco router with 10Gbps interface and we have
> wrong MAX SPEED 4295.0 Mbits/s.
> I discovered, that this is probably overflowed 32bit counter:
> IF-MIB::ifSpeed.19 = Gauge32: 4294967295

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