I'm struggling with a network design as follows:2 L3 switches running HSRP with 2 VLANs - 1 for users, 1 for servers I then have a VLAN that my FW is connected to for Net access.
Now, I have to add on two remote sites. These two sites have the main network (described above, call it Site HQ) as their default gateway. It is critical that they be able to reach the server VLAN and the FW VLAN. Now - I want to connect Sites 1 and 2 with redundancy and as much automated failover as possible. RIP is running (I plan to go to EIGRP later).
Looking at one remote site only: The most expensive and I think most redundant solution would be to buy four routers with two T1s and build a square type topology where the remote LAN would reside on an L3 switch which would be the default GW, with it having default routes to both of the routers depending on which was "primary".
I could also have two routers with Multilink PPP running to load balance between HQ and Site 1. My problem there is how do I connect it at HQ for HSRP to be effective? I have the "WAN" stuff running off of another VLAN on the 3750s - but HSRP is not enabled for that VLAN - should it be? If the HSRP master doesn't go down, but one of the T1s does, I don't really want the whole network to fail to the HSRP slave, I was thinking of just having a backup route pointing to the HSRP slave and then out to the remote site.