[mrtg] DSCP/COS stats on Cisco router

Alan Lehman alehman at gbateam.com
Wed Sep 24 15:50:10 CEST 2014

Thank you again for sharing your script. It seems to work well with my 2901. I do have a question regarding something I'm seeing in the output. I get four graphs for class-default:

class-default.4419217 drops
class-default.4419217 Pre/Post Policy bit rate
class-default.14664689 drops
class-default.14664689 Pre/Post Policy bit rate

There are no drops showing up, but the two Pre/Post graphs appears to be the same.
Can you help me understand what these represent?

-----Original Message-----
From: Volk,Gregory B [mailto:greg.volk at edwardjones.com] 
Sent: Monday, September 22, 2014 7:44 AM
To: Alan Lehman; mrtg at lists.oetiker.ch
Subject: RE: DSCP/COS stats on Cisco router

I've attached cbqos-cfgmaker.txt. This is a perl script that I wrote using mib variables defined in CISCO-CLASS-BASED-QOS-MIB and CISCO-CLASS-BASED-QOS-CAPABILITY. I've had reasonably good luck with it running against several Cisco models including 2900, 6509, 7304, ASR1003, and even all the way back to 7206XVR.

One downside to it is that the cbQosIfIndex instance numbers are not necessarily static through some config changes and reboots, but those are rare enough in my environment that it hasn't been a major issue for me.

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-----Original Message-----
From: mrtg [mailto:mrtg-bounces+greg.volk=edwardjones.com at lists.oetiker.ch] On Behalf Of Alan Lehman
Sent: Friday, September 19, 2014 3:44 PM
To: mrtg at lists.oetiker.ch
Subject: [mrtg] DSCP/COS stats on Cisco router

I’m new to this list, but have been using mrtg for ages. Recently we implemented COS on our MPLS network. I would like to be able to see traffic on our Cisco 2901 broken down by COS/DSCP classification. Has anyone been able to accomplish this?

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