From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Wed Dec 07 2005 - 20:11:06 GMT-3
You could do this with BGP conditional advertisement.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mike Flanagan
Sent: Wednesday, December 07, 2005 3:29 PM
To: Mike Flanagan
Cc: Cisco certification
Subject: Injecting default route only with loss of IP route WAS: Re: IE
Lab 6 conditional default route advertisement
Is there a way to only send a default route if you loose a route
in the IP routing table ?
On Dec 7, 2005, at 12:06 PM, Mike Flanagan wrote:
> In this section for injecting a default route you only do it if
> your route-map matches the networks in question. Like for instance
> as long as I have a route to 192.10.1.0/24 advertise the default
> route. Well what if I wanted to advertise the default route if I
> lost a route in my route table ? Like for instance lets say if I
> lost my connection to BB2 would I use
>
> router ospf 1
> default-information originate always route-map CONDITION
>
> ip prefix-list BB2 seq 5 permit 192.10.1.0/24
>
> ip prefix-list BB3 seq 5 permit 204.12.1.0/24
>
> route-map CONDITION deny 10
> match ip address prefix-list BB2
>
> rute-map CONDITION deny 20
> match ip address prefix-list BB3
>
> I think with this I would only advertise the default route if I
> lose either route in my route table is this correct ?
>
> Also with this solution would I only advertise the default route
> if I lose both connections at the same time ?
>
> router ospf 1
> default-information originate always route-map CONDITION
>
> ip prefix-list BB2 seq 5 permit 192.10.1.0/24
> ip prefix-list BB2 seq 5 permit 204.12.1.0/24
>
> route-map CONDITION deny 10
> match ip address prefix-list BB2
>
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