North American Network Operators Group
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Re: BGP and aggregation

  • From: PS
  • Date: Sun May 12 16:59:30 2002 

On Sun, 12 May 2002, Scott Granados wrote:

> Don't forget that if both sites use the same as even if the connection
> link drops they will not be able to see each  other over the upstream
> provider as routers won't take the srutes from the same as.  If this
> isn't a problem don't worry about it.  If you wish to preserve
> connectivity between cities you should have a back-up link or use
> different as's or gre tunnels:).

Floating statics would be a less-hassle means to continue connectivity
(with only 2 locations not much of a scaling issue).  Or, if you want, a
default route (learned via BGP if possible) going to your upstream(s).  An
IBGP session sharing full routing information might not be something you
want to keep established over a GRE tunnel.



- Paul