From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Dec 08 2005 - 10:53:15 GMT-3
Post the config along with the pre and post routing tables when
the tracked network is up and down.
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
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> -----Original Message-----
> From: Arun Arumuganainar [mailto:aarumuga@hotmail.com]
> Sent: Thursday, December 08, 2005 12:22 AM
> To: Brian McGahan; Andrew Lissitz (alissitz); Mike Flanagan
> Cc: Cisco certification
> Subject: Re: Injecting default route only with loss of IP route WAS:
Re:
> IE Lab 6 conditional default route advertisement
>
> Hi Brian ,
>
> I have tried this with ISIS . Its was working perfectly .
>
> Thanks and Regards
> Arun
>
> ----- Original Message -----
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> To: "Andrew Lissitz (alissitz)" <alissitz@cisco.com>; "Mike Flanagan"
> <mikenoc@mindspring.com>; "Arun Arumuganainar" <aarumuga@hotmail.com>
> Cc: "Cisco certification" <ccielab@groupstudy.com>
> Sent: Thursday, December 08, 2005 11:02 AM
> Subject: RE: Injecting default route only with loss of IP route WAS:
Re:
> IE
> Lab 6 conditional default route advertisement
>
>
> > Only BGP supports this via conditional advertisement.
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> >
> > > -----Original Message-----
> > > From: Andrew Lissitz (alissitz) [mailto:alissitz@cisco.com]
> > > Sent: Wednesday, December 07, 2005 11:02 PM
> > > To: Mike Flanagan; Brian McGahan; Arun Arumuganainar
> > > Cc: Cisco certification
> > > Subject: RE: Injecting default route only with loss of IP route
WAS:
> > Re:
> > > IE Lab 6 conditional default route advertisement
> > >
> > > Hey Arun, Mike, Brian, and group,
> > >
> > > In a separate email, Arun suggested the default-information
command
> > that
> > > referenced a route-map. I configured this and got it to work for
a
> > > route that was in the routing table. Nice feature, thanks Arun
for
> > > suggesting this.
> > >
> > > As Mike asks however, how to do this for a route not in the table
via
> > an
> > > IGP?
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf
> > Of
> > > Mike Flanagan
> > > Sent: Wednesday, December 07, 2005 6:25 PM
> > > To: Brian McGahan
> > > Cc: Cisco certification
> > > Subject: Re: Injecting default route only with loss of IP route
WAS:
> > Re:
> > > IE Lab 6 conditional default route advertisement
> > >
> > > I was thinking of doing this in the IGP like OSPF. Similar to
how
> > you
> > > have in your Internetwork Expert lab 6 for conditional default
route
> > > injection. Only difference is that instead of advertising when you
> > have
> > > a route only advertising when the out leaves.
> > >
> > >
> > > On Dec 7, 2005, at 6:11 PM, Brian McGahan wrote:
> > >
> > > > You could do this with BGP conditional advertisement.
> > > >
> > > >
> > > > HTH,
> > > >
> > > > Brian McGahan, CCIE #8593
> > > > bmcgahan@internetworkexpert.com
> > > >
> > > > Internetwork Expert, Inc.
> > > > http://www.InternetworkExpert.com
> > > > Toll Free: 877-224-8987 x 705
> > > > Outside US: 775-826-4344 x 705
> > > > 24/7 Support: http://forum.internetworkexpert.com
> > > > Live Chat: http://www.internetworkexpert.com/chat/
> > > >
> > > >
> > > > -----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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