I have 3 sites
Site A - BGP Peer to Internet and Metro Ethernet to Site B
Site B - BGP Peer to Internet and Metro Ethernet to Site A and Site C
Site C - BGP Peer to Internet and Metro Ethernet to Site B
I have 2 - IPV4 /24s that are routed over BGP through the peer at each site.
I have IBGP running between the sites. Each site has a RouterOS box.
Site A also has a /28 that is routed
Site B also has a /29 that is routed
Site C also has a /29 that is routed
The IP addresses from the /24's work great. The problem is that the smaller subnets are getting redirected to the shorted AS Path and when Site B /29 goes out Site A the routing fails. How do I force traffic from Site A's /28 to only go out through Site A and the same for Site B and Site C?
I realize that anything utilizing the /28 and /29s will not have the redundancy offered by BGP.
The other option I would like to look into is failing over to a VPN between sites if the Metro Ethernet ever goes down.
Also, is there any way to auto apply firewall rules applying to the /24's to all of the routers automatically?