[c-nsp] Graphing more than 114Mbps with mrtg

Marcel Lemmen marcel at support.net
Fri Oct 29 04:36:17 EDT 2004

Hi Mark,

the problem is the 32bit counter. The counters are switching back to 0 to
fast. You should use 64bit counters which are available on most cisco's.

For the catalyst we use:
For the routers we use:$val.$if

where $val is incoming or outgoing and $if the interface number.

You can do a snmpbulkwalk and grep for 64 :)

Hope this helpes.

PS, try RRDBrowse (http://www.rrdbrowse.org) which has the right functions
and counters :)

With kind regards,

Marcel Lemmen
Support Net - Partner in Managed Internet Solutions

--- The previous message was something like this: ---

!>Date: Fri, 29 Oct 2004 09:24:36 +0100
!>From: Mark Taylor <maillist at smashie.ision.co.uk>
!>To: cisco-nsp at puck.nether.net
!>Subject: [c-nsp] Graphing more than 114Mbps with mrtg
!>Without meaning to turn the list into an mrtg forum :)
!>I don't seem to be able to graph interface transfer rates above 114Mbps with
!>mrtg. I think this is because the cisco counter
!>interfaces.ifTable.ifEntry.ifInOctets.x wraps back to the start within the 5
!>minute collector period at rates above this. Does anybody know how to solve
!>Temporarily I'm collecting the data more often before the counters wrap. Is
!>there a different OID that I need to use? Or do I need to configure
!>something within the snmp-server on the cisco to use a bigger counter size?
!>I have the same issue on Cisco IOS routers/switches and also CatOS switches.
!>Any suggestions greatly appreciated,
!>cisco-nsp mailing list  cisco-nsp at puck.nether.net
!>archive at http://puck.nether.net/pipermail/cisco-nsp/

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