this all seems to work well, though i would like any comments you might have as to the methods i used
VLAN555 is only the L2 ports on each side one on SW1 and one on SW2, each switch has a vlan interface with a small subnet for connectivity
Main Office Core Router (A) BGP session with (SW1) this router receives 172.16.3.0/24 from SW1 if L2 is up else it goes to router B via a weighted route.
Main Office Internet Router (B) IPSEC between this and (E) if the L2 goes down
Main Office Core Switch (SW1) BGP session (A) BGP session (SW2) over L2 to 172.16.1.1 L2 connection is in one port in VLAN 555 An interface vlan555 with IP 172.16.1.2
Remote Office Core Switch (SW2) BGP session with (SW1) over L2 to 172.16.1.2 this recieves Main Office routes and goes out router E if the L2 goes down L2 connection is in one port in VLAN 555 An interface vlan555 with IP 172.16.1.1 Remote office subnet is 172.16.3.0/24
Remote Office Internet Router (E) IPSEC between this and (B) if the L2 goes down
Thanks. RS