[c-nsp] BGP <-> OSPF default route failover

[Seth Mattinen]

tkacprzynski at SpencerStuart.com wrote:
> I am trying to figure out what would be the best way to provide redundant Internet access across two sites running BGP full routing tables at the edge and OSPF between the sites. My main goal is to be able to have fail-over to the other site's Internet access in case the Internet circuit goes down. 
> 
> Since I won't be getting a default route from the ISP I can't redistribute that default route to OSPF. One way is to just originate a default route from the OSPF process running on the edge provider, but my question is how to take it away if the Internet circuit fails and reroute it to the other site. 
> 
> Topology:
> (ISP1 ) - Site A (BGP-OSPF)– OSPF Backbone - Site B (OSPF-BGP) - (ISP 2)
> 


Separate physical sites? How are they connected? (I'm assuming you don't 
have a full mesh since that would take care of it for you automatically.)

~Seth