Help with Confederation-RR-MPBGP

Philip Lavine source_route at
Wed Jun 18 16:31:38 UTC 2014

I guess my question is (sorry MPLS speak ahead) with 4 PE's on the edge running MP-BGP and ISIS & 4 P's in the core running ISIS, is it best practice to confederate or use a route reflector and make the PE's clients.

Basically I want to know what an ISP would do, not a test in a LAB.

On Thursday, June 12, 2014 2:45 PM, Michael Hallgren <m.hallgren at> wrote:

Le 12/06/2014 18:39, Valdis.Kletnieks at a écrit :

> On Thu, 12 Jun 2014 09:25:20 -0700, Philip Lavine said:
>> need some guidance on best practices
> What the vendor says is best practices, or what people in the trenches
>> Is it more efficient to use RR or Confederation?
> If option A is 2% more "efficient" than option B, but takes 10% longer to
> deploy and causes 3% more SLA payouts to your customers when the added
> complexity causes a whoopsie, how much more work could you have gotten
done in
> the time you spent in an uncomfortable meeting explaining to upper
> why the whoopsie happened?
> (Sorry, it's been that sort of week :)


Now, Philip, I think along the same path as Vladis: it depends... What does
your physical or layer 2 network look like? How do you expect packets to
move around inside, and in and out, of that topology? You need policing?
How much and of what, etc, etc...?

I'm quite often a fan of confed's, if the network is young thus ``easy''
migration, but there are scenarios... Please provide more detail to this
thread or one-to-one if you prefer.




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