From: John Matus (John.Matus@tokiom.com)
Date: Wed Dec 07 2005 - 18:40:34 GMT-3
well, by default, a router is going to route to the most specifitc route -
it will router to 1.1.1.0/24 before it routers to 1.1.0.0/16. the default
router will be listed as a gateway of last-resort (i think....), and will
only be used if it can't find a more specific match in the routing table (i
think)... :)
Regards,
John D. Matus
Technical Support / PAS
Fujitsu Consulting
626-568-7716
John.Matus@tokiom.com
Mike Flanagan
<mikenoc@mindspri
ng.com> To
Sent by: Mike Flanagan
nobody@groupstudy <mikenoc@mindspring.com>
.com cc
Cisco certification
<ccielab@groupstudy.com>
12/07/2005 01:28 Subject
PM Injecting default route only with
loss of IP route WAS: Re: IE Lab 6
conditional default route
Please respond to advertisement
Mike Flanagan
<mikenoc@mindspri
ng.com>
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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