From: Swan, Jay (jswan@sugf.com)
Date: Wed Oct 17 2007 - 18:45:19 ART
If you're using EIGRP, there's a hidden command "show ip eigrp event"
that gives you a history of route changes.
In the unlikely event you're running IS-IS, there's "show isis spf-log".
I'm pretty sure you can also do this with SNMP, but I'd have to do some
research.
Jay
#17783
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ryan Morris
Sent: Wednesday, October 17, 2007 2:41 PM
To: ccielab@groupstudy.com
Subject: Re: Logging routing table changes
Thanks for the suggestion Amin, I wasn't familiar with the summary
keyword.
I'm trying to track when routes change to our backup WAN links, so
we should have the same number of routes after the change, and the
summary output should be the same.
We are doing logging buffered including debugging, but route changes
don't
appear unless I turn on debug ip routing, which I really don't want to
do
(and isn't maintained through a reboot).
R.
On Wed, 17 Oct 2007, Aminul Siddiqui wrote:
> Hi Ryan,
> How about informational logging? If that doesn't help, I can think of
'sh ip
> route summary' will give you a list of your subnets. So, if you
maintain
> that you can get the difference as a new addition or deletion.
>
> Thanks.
> Amin
>
> On 10/17/07, Ryan Morris <ryan@egate.net> wrote:
> >
> > Hi group,
> >
> > I have a production network on which I would like to log when
changes to
> > the routing table occur (i.e. NOT debug IP routing on my production
> > network). Just a basic log message that says "x.x.x.x route
> > added/removed". I can't find any documentation for a feature like
this in
> > the Cisco documentation.
> >
> > Any thoughts?
> >
> > Ryan Morris
> > CCIE #18953
> >
> >
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