We have two sites, 3 ISPs, a router for each ISP.

Two at our main location, one at DR site.

All three are running BGP. The two at the main site are primary/secondary connections for each other. We are using ISP assigned class C on each connection. The DR site is the tertiary connection for both.

I have tested the BGP routing inbound and it will traceroute to the DR site when the two routers at the main location are down. We are only running IBGP between two routers at main office. Do I need to add an IP address to the DR router as a secondary IP on the router there? Also, will I just need to create/mimic all my ACLs from the main location to our DR site?