Distributing default routes into BGP from two sites.
I have twenty sites. all are up and runnig on Verizons PIP network. One of the sites is our primary site providing WWW and core processing. Another site is a DR site which has WWW access incase of a disaster at primary site.
The networks routing protocol is BGP.
I want to distribute a default route and 10.22.0.0/16 into the network from two locations, one with a normal admin distance and another from the DR site with a high distance that will take over from the primary site in the event of a disaster.
Re: Distributing default routes into BGP from two sites.
if this a L3 VPN with SP you can use AS path prepending when advertising from DR site in the hope that each occurrence of the private BGP ASN will result in provider ASN in the AS path seen on the other VPN sites.
A better but more complex solution involves the use of BGP conditional advertising
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