[mrtg] Re: VLANS and MRTG

Hall J D (ISaCS) jdhall at glam.ac.uk
Fri Aug 13 13:36:42 MEST 1999

Hello All,

I've been following this thread with interest as I was just about to start
monitoring our Catalyst 2924-XLs with MRTG.

I configured one into MRTG yesterday using a standard
'cfgmaker --vendor public at ipaddress >unit.cfg'
and I'm getting graphed exactly what I would expect to see, that is the
traffic associated with each port, irrespective of VLAN.

Is this what you're trying to get i.e. a graph of traffic for each port? Or
a graph for the traffic on each VLAN?

The switch is running 11.2(8)SA5 Enterprise Edition. I know there were
traffic reporting problems with early releases, the fix was in 11.2(8)SA3 I

I hope this helps.


Jonathan Hall                       University of Glamorgan
Senior Network Development Officer  Information Systems and Campus Services
jdhall at glam.ac.uk                   Pontypridd
                                    CF37 1DL, United Kingdom

:> On Wed, 11 Aug 1999, Phillip Ryker wrote: 
:> :I am still having problems figuring out how to get MRTG to read in/out 
:> :traffic for switched ports in Different VLANS.
:> :
:> :I have a cisco 2924XL switch.  It is VLANED into 4 segments as follows: 
:> :
:> :       ports 1-8:      VLAN 1
:> :       ports 9-16:     VLAN 2
:> :       ports 17-20:    VLAN 3
:> :       ports 21-24:    VLAN 4
:> :
:> :When I run cfgmaker on the switch it sees all the ports just fine.  When

:> :I  run MRTG on the .cfg file it only reads traffic for ports on the
:> :first VLAN.  It shows "0" for all the other ports.  I have not been able

:> :to figure this one out and I unfortunetly do not have an extensive
:> :knowledge of SNMP.  I tried walking the switch and really do not know 
:> :what I am looking at or for??
:> :
:> :Any help would be appreciated.
:> :
:> :Thank you
:> :--
:> :-------------------------------------------------------------------- 
:> :Phillip Ryker                                  pryker at skynetweb.com 
:> :President                                      SkyNetWEB Ltd
:> :Phone: 410-563-6384 Ext 12                     1301 S. Baylis St. 
:> :Fax: 410-563-5457                              Baltimore Md. 21224
:> :-------------------------------------------------------------------- 
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:> :-------------------------------------------------------------------- 

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