Cisco Route Graph

sjk · Joined: 01 Jul 2003 Posts: 1 Location: Chicago, IL

I am looking for a way to graph the bgp route counts and bgp table prefix count on our cisco routers and I can't seem to locate an oid for this value . . . perhaps there isn't one. I could grab the whole table and count it -- but that uses a huge amount of cpu and bandwidth. Just wondering if anyone else has ever tried doing this.

Thanks -- sjk

Guest · Posted: Mon Aug 25, 2003 7:44 am Post subject:

Hello,

Never tried this but it would be really cool if this could be done.

pestilence · Posted: Tue Aug 26, 2003 4:00 am Post subject:

Unfortunatelly there does not exist a routing (at least BGP which i checked) MIB for routing information, there are only some MIBS to show you the information exchanged between the 2 peers, but there isn't a MIB to show you the total ammount of networks exchanged between the 2 peers...Most people have implemented telnet-scripts for this...

Rune Nilssen · Guest

Slightly off topic, but if you would be so kind as to tell me some more about those telnet scripts I would be more than grateful.

Best regards,
Rune Nilssen
www.directconnect.no

tincze · Joined: 15 Jul 2008 Posts: 1

If you have snmp turned on in your cisco router, you should be able to do:
snmpwalk -Os -c yourcommunityname -v 1 yourciscobox ipRouteDest | wc -l

inside of a script. But there really isn't an OID that gives you that count.

If you want to then use that value within cacti, then put the command into a script, and put it under /usr/share/cacti/site/scripts/
and then setup a query according to the instructions here:
http://docs.cacti.net/node/296

I've done that, and works quite nicely, except if you have a lot of bgp peers(like over 1000), then the script takes too long to execute and causes gaps in the graphs. So to get around that. I run the above in a cron job and redirect the output to a file, then my cacti script simply reads that file. Definitely ugly cause there's multiple points of failure, but best way I've found so far.

-T