Hi,
we have a network with 50 sites all connected via a private MPLS network using BGP.
Our egress to the internet is at one site (SITE A) and we advertise network 0.0.0.0 here.
All is well and all sites can access the internet via SITE A.
We now have another egress point at SITE B.
What would happen if we advertise 0.0.0.0 at SITE B?
Is there a way for us to prefer SITE A 0.0.0.0 (via weights?) to SITE B 0.0.0.0 so that SITE B is only used if SITE A is offline?