[c-nsp] delay eBGP sessions on startup?

[Gert Doering]

Hi,

On Wed, Nov 25, 2009 at 05:50:45AM +1000, David Hughes wrote:
> 
> On 24/11/2009, at 5:19 PM, Gert Doering wrote:
> 
> > Well, the "two routers" mentioned above are "the core" and "the border 
> > routers".  There *is* only these two :-)
> 
> Well, in that case the only thing I can think of is conditional 
> advertisement based on the visibility of an iBGP prefix that you 
> receive from the other router as someone mentioned before.  

Sounds like a plan - Router A down -> prefix missing on Router B, remove
external announcement there as well.

"How to build a redundant network that falls off the 'net if *either* router
dies" :-))

> Again, this wouldn't be deterministic and you could quite possibly
> still blackhole traffic but hopefully for a much shorter time.  At
> least you'd know that the iBGP session had been established and
> prefixes were flowing even if things hadn't totally reconverged.

"internal routes in OSPF" :-)

gert
-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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