[mrtg] Re: Counter wrapping on high-capacity interfaces

[Tyler J. Frederick]

>From the docs:

SNMPv2c
If you have a fast router you might want to try to poll the ifHC*
counters. This feature gets activated by switching to SNMPv2c.
Unfortunately not all devices support SNMPv2c yet. If it works, this will
prevent your counters from wraping within the 5 minute polling interval. As
we now use 64 bit instead of the normal 32 bit.

      Example:

       Target[ezwf]: 2:public at router1:::::2


Note, the '1' in the example is part of the hostname (router1).

tf.

-- 
Tyler J. Frederick
Systems Engineer/CCSE
Sportsline.com, Inc.

On Thu, 27 Sep 2001, David wrote:

>
> Hi folks,
>
> I've got minor problem graphing traffic stats on some Cisco boxes.
> Specifically, when I graph usage on a couple of OC-12 connections, the
> numbers are way off -- because the internal counter on the cisco wraps
> in less than the five-minute sample interval. (It only counts up to
> about 5GB, so we can overrun it in well under five minutes)
>
> I've worked around it by cutting my sample time down to one minute
> (there's few enough interfaces that this does not create a big load) but
> I am wondering if anyone else on the list has come up with more creative
> solutions to this sort of problem.
>
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