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New Member

MRTG for DS-3 link

Hi,

has anybody used MRTG to monitor a DS-3 link..I tried using it but i don't get graphs for the traffic on the DS-3 interface.

MRTG says that since its a DS-3 controller its unable to plot the graph.

Any help is appreciated.

regards,

jimmy.

6 REPLIES
New Member

Re: MRTG for DS-3 link

You should be able to monitor just about anything that has snmp enabled on it. Try monitoring the interface via its WAN ip. The MRTG documentation explains how to do that

New Member

Re: MRTG for DS-3 link

The controller shouldn't matter, I monitored a T3 with MRTG and the e-mail from the AT&T engineer was correct just use the IP address, which is what I did.

New Member

Re: MRTG for DS-3 link

Same here. We're currently monitoring several DS3's with MRTG using IP address. Just make sure you specify the bandwidth when you runn ./configure.

New Member

Re: MRTG for DS-3 link

Try specifying the interface type as 30.

New Member

Re: MRTG for DS-3 link

Hi,

I've DS-3 ATM interface that I use MRTG to monitor the traffic with. I've also have 3 PVCs on sub-interfaces on that same DS-3. To monitor the 'whole' DS-3 (which may not have an IP address assigned to it), you have to be able to determine it's 'if-index', ref: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_4_1/mib/getmib.htm#xtocid2401516 . That was the only way I could find out what the if-index was on the 'physical' ATM interface.

This is what my mrtg.cfg file looks like (edited for mass consumption):

#....................................................

Target[123.123.254.1.1]: 1:bonzo@123.123.254.1

MaxBytes[123.123.254.1.1]: 386000

Title[123.123.254.1.1]: 7206 (): ATM4/0

PageTop[123.123.254.1.1]:

Traffic Analysis for Access Pipe on DS-3 Coaxial Cable

System:7206
Maintainer:(212) 555-2140
Interface:ATM4/0 (1)
IP: ()
Max Speed:
386.0 kBytes/s (DS-3 Serial Coax Physical I/F)

#---------------------------------------------------

Notice the .1 'if-index' after the IP address. Of course, yours will be different. My DS-3 I/F just happened to end up .1 . You will also notice that although I'm monitoring a DS-3 coax pipe, I've limited the actual bandwidth to 386KBs. I actually have two DS-1's and have them mux'd together, with the mux presenting a 'coax DS-3' to the router ATM interface.

Here's one of the 'sub-interface' PVCs that does have an IP address assgined to it:

#----------------------------------------------------Target[123.123.254.1.24]: 24:bonzo@123.123.254.1

MaxBytes[123.123.254.1.24]: 193000

Title[123.123.254.1.24]: 7206 (7206-AT4/0.1): ATM4/0.1

PageTop[123.123.254.1.24]:

Traffic Analysis for ATM4/0.1 PVC

System:7206
Maintainer:(212)555-2140
Interface:ATM4/0.1 (24)
IP: 7206-AT4/0.1 (192.168.76.70)
Max Speed:
193.0 kBytes/s (ATM AAL5)

#---------------------------------------------------

Notice the .24 index. This PVC rides within the first physical ATM interface. I have two more just like it (different if-indexes), all riding within the ATM pipe. The above config shows bandwidth based on our 'burst' size for the PVC, which is 1.544Mbs or 193KBs.

All this depends on your being able to access the if-index on your router as stated in the html link above.

I hope this helps you on your journey!

New Member

Re: MRTG for DS-3 link

sorry about the last post, looks like some html got mixed in with it. try and decifer it anyway!

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