[c-nsp] Dual-homing without BGP

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Thu Feb 16 12:14:46 EST 2006

Tim Franklin <> wrote on Thursday, February 16, 2006 5:56 PM:

>> well, but Vincent just does not want what multihoming gives
>> him, he does
>> not want to use the redundancy via the 2Mbit link, so I think PBR
>> (which, BTW, has been cef/interrupt switched for a looong
>> time now) will
>> do just what he wants. or am I missing something?
> Missing that, irrespective of which switching path it's now in, the
> reputation of PBR as slow, flakey and scary often remains? ;)

Ok, right.. traffic engineering (by whatever means) is often "scary".. 

[ removed the incoming direction discussion as, I think, Vincent is only
concerned about outgoing ]

> For outgoing, run two HSRP groups across the T and N routers. 
> Ecommerce has the virtual address with T primary as its default
> gateway, streaming has the N virtual address.

Hmm, would work if the BGP routers and servers are directly connected,
and then one could just have the streaming point to N's real address and
make sure to not have any T routes on the N router.. then N will just
drop the traffic once the connection is down..
If the network is larger, I think PBR is the easiest solution (until MTR
is around and we can just stick streaming traffic into its own SPT)


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