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