[mrtg] Re: BGP Monitoring MRTG

[David Manchado]

Hi Simon,

I finally wrote down a perl script that parses the bgp table (sh ip bgp
sum). I write a 'cache' file where I save the table and this way I don't
stress the router making multiple queries every time.

Maybe when Cisco implement a new BGP-4 MIB I'll take this item again but til
then I'll go on doing this way.

Thanks, David

----- Original Message -----
From: "Simon Leinen" <simon at limmat.switch.ch>
To: "David Manchado" <dmanchado at eurociber.es>
Cc: <mrtg at list.ee.ethz.ch>
Sent: Tuesday, October 23, 2001 1:25 PM
Subject: [mrtg] Re: BGP Monitoring MRTG


>
> >>>>> "dm" == David Manchado <dmanchado at eurociber.es> writes:
> > I want to monitor BGP4 Prefixes on a Cisco Router. This router
> > supports over 10 BGP sessions and I'd like to graph how many
> > prefixes anounces each AS/BGP Session, is this posible; or can I
> > know the whole amount prefixes anounces by all the BGP sessions at
> > least?
>
> Unfortunately neither of this can be found directly in the current BGP
> MIB (RFC1657) or in any Cisco MIB I know of.
>
> However, the current Internet-Draft proposal for an improved
> replacement for RFC1657 includes a table `bgpPrefixCountersTable',
> which has per-peer (and per-address family) counters of prefixes
> received, sent, withdraws received, withdraws sent, in-RIB, accepted,
> and rejected.  See e.g.
>
>
http://sunsite.cnlab-switch.ch/ftp/mirror/internet-drafts/draft-ietf-idr-bgp
4-mibv2-00.txt
>
> (should soon be replaced with a -01 or -02 version).
>
> > I've found BGP4-MIB.my and I use the LoadMIBs command (LoadMIBs:
> > /path/BGP4-MIB.my); I always get the same error: Expected number but get
""
>
> > How can I implement this? Do I have to write an external script and
> > link it to MRTG or I can write down a .cfg file?
>
> Unfortunately this isn't really possible using SNMP requests yet, at
> least not with standard MIBs.  So you can either write a script that
> gets this information by telnetting to the router and parsing "show
> ip bgp summary" output, or wait until Cisco starts implementing the
> new BGP-4 MIB.
> --
> Simon.
>
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