[c-nsp] Understanding Out/Input bytes in Interface Counters on 2811

[Keegan Holley]

32bit counters would wrap at 4.29GB so it would never get to 300GB.  As far
as I know most newer devices have 64 bit counters, but I could be
mistaken.  The last update I could find on cisco.com was from 2007.  It
would be pretty stupid to have gigabit interfaces on a device with counters
that wrap at about 33Gb.    The show int command should show the last time
the counters were cleared.  Even less likely is they are counting in bits
and not bytes.  I would want to see this kind of data come from a
monitoring platform of some sort.  If you don't have graphs I would ask for
data from the vendor's billing/polling servers.

2012/4/19 Peter Subnovic <cnspmail002 at googlemail.com>

> Dear List,
>
> i am having an Cisco 2811 with IOS (C2800NM-ADVENTERPRISEK9-M), Version
> 12.4(24)T
>
> Our Provider told us that we had a traffic volume of 300GB last month, but
> the interface counters do not reflect these values:
>
> I am curios, if the reported volume should be reflected in the out/input
> bytes
>
> When i am looking on the counters of the interface which is connected to
> the Provider Router, the following values are shown:
>
> 1089368953 packets input, 744025984 bytes
>
> 970733443 packets output, 3196131116 bytes
>
> I searched the Open/Resolved Caveats document, but couldnt find anything
> related.
>
> http://www.cisco.com/en/US/docs/ios/12_4t/release/notes/124TCAVS.pdf
>
> So my question is:
>
> Shouldn't they be at least somewhat near the reported volume? or am i
> missing something (maybe very basic) here? or are the counters just broken?
>
> Unfortunately, i do not have any other possibility to verify the volume (i
> know this is bad and will be changed).
>
> Any pointers to documents or something else is highly appreciated.
>
> Thanks for your time.
>
> Kind regards,
> Peter
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>