nanog mailing list archives

Re: AT&T NYC


From: alex () yuriev com
Date: Tue, 3 Sep 2002 14:57:32 -0400 (EDT)



1) You should have a static route for every bgp next-hop, on every router?
Including both router loopbacks and EBGP next-hops?

Absolutely not.

2) You should have a static route for every router loopback, on every router?

Asolutely not.

3) You have lots and lots and lots of iBGP sessions not only across loopbacks
but between directly-connected interfaces in order to jumpstart the
"real" ibgp sessions?

Absolutely not.

4) something else?

Yes. 

And that: you don't use "closest-exit" at all, but haul traffic, wherever,
around your network based upon steps below the igp-metric step in the bgp
decision tree?

Nope, we did.

The only thing that has been clear is that you redistribute statics into
BGP, which I'm fairly certain most people already do.

Nope, we dont and never did.

I'm sorry, but so far, I'm not buying how a static net is better. You seem
to be trading off the complexity of automatically performing SPF, for the
complexity of manually performing SPF. I'ld certainly hate to be in your
Ops group when a particular path fails, requiring someone to sit with pad
and paper and recompute SPF, by hand, for a hundred routers. On the
up-side, the original failure might be fixed by the time the computation
is about 50% complete.

Again, there is no static net.

Alex


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