From: Piyoush Sharma (piyoush@gmail.com)
Date: Tue Jan 13 2009 - 15:38:04 ARST
Another (not zero-touch though) design is, if you use BGP on MPLS, setup
iBGP on your dmvpn and let an IGP like OSPF handle the best path selection.
Dump routes from dmvpn and mpls into the local site's IGP and the mpls would
be preferred, if mpls goes down, the routes from dmvpn would be preferred..
I prefer to summarize all major subnets on the mpls and dmvpn. it limits the
routing table size and if you use correct tags, troubleshooting is a
breeze..
On Tue, Jan 13, 2009 at 8:47 AM, Joseph Brunner <joe@affirmedsystems.com>wrote:
> We actually like to do longer prefixes known via mpls and less specific
> ones
> know via the dmvpn...
>
> So 10.1.10.0/24 would be learned on mpls while
>
> 10.1.0.0/16 would be learned (as the backup) on dmvpn
>
> -Joe
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Fake
> Name
> Sent: Tuesday, January 13, 2009 11:00 AM
> To: Cisco certification
> Subject: DMVPN question
>
> If I want to use dmvpn to be a backup for the already existing mpls network
> where each location has a connection to the internet and mpls connections
> to
> eachother what is the best practice? Would it be configuring dmvpn and
> using the same routing protocol instance between everything and playing
> with
> the metrics to make sure traffic is going over the mpls network and not the
> dmvpn when its up and when it does down to use the dmvpn backup? Or would
> it be using another routing protocol for the dmvpn network with a higher
> administrative distance so that routes dont go in the table till the mpls
> network is down?
>
> Please offer some advice on best practices?
>
>
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