Re: OSPF filtering

Just remember to re-enable debug when your router reloads, as "debug
ip routing" will not survive the reboot...

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Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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On Thu, Feb 11, 2010 at 17:26, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:
> I have managed to solve my problem. I used EEM to do it.
> Initially my two locations had to have new L2 link. so both my
> locations would be in area 212 and have only one connection to area 0
> and this problem wouldn't exist. Since I didn't get that link, whole
> scenario seems bad if you don't know whole story. Never the less, I
> used EEM on router that has backup link on it. EEM monitors debug ip
> routing msgs defined in one ACL. When it get log msg like this:
>
> RT: delete route to 10.212.128.0/17 via 10.212.20.18
>
> it knows that OSPF link with area 0 is down and it brings up the
> backup interface. When OSPF with area 0 recovers it gets something
> like this:
>
> RT: add 10.212.128.0/17 via 10.212.20.18
>
> and another event applet shuts down the backup port.
>
> At the other location backup link is always UP. I also put some mail
> notifications in event which tracks my backup FE interface, and that
> is whole idea.
> I tested couple of scenarios and it works fine.
> Thanks for your assistance.
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