makemorebeer
Technical User
i think i've painted myself into a corner. i've got a remote site, and a main site that both run on the same subnet 10.1.0.0/16. to connect the remote site to the main site i've got two 1400 bridges which run at layer 2. then i've got a VPN tunnel between two cisco routers making a backup connection at layer 3. is it possible to do what i'm trying to do on this. I beleive my largest hurdle in this is the remote site being in the same subnet as the main site.
what we are trying to accomplish is to have our main office connect through two links(primary, autofailover to backup) to our remote office on the other end of town. however when this was all setup the remote site was created as an extension of the mainsite subnet. so in essence the remote site is 10.1.0.0/16 and the main site is 10.1.0.0/16. up until this point it's been fine but we've found ourselves needing a backup link and we figured the best way to do this was going to be using a vpn tunnel.
now what we are finding is it's impossible to route traffic across this layer 3 tunnel because the subnets are the same. is there some way that i can do this without reassigning the subnet for the remote site? is there some way to propogate layer two across the routers and run spanning tree.
1) can you have this type of setup and make it work
2) can i do this without having to redo the entire subnet in question
3) can this be done with existing equipment that i've mentioned
4)will i still be able to use the DMVPN links that garnetbobcat was so helpful with creating.
As a side note i posted something about this about a month or two back but i don't think i was very clear on the situation.
what we are trying to accomplish is to have our main office connect through two links(primary, autofailover to backup) to our remote office on the other end of town. however when this was all setup the remote site was created as an extension of the mainsite subnet. so in essence the remote site is 10.1.0.0/16 and the main site is 10.1.0.0/16. up until this point it's been fine but we've found ourselves needing a backup link and we figured the best way to do this was going to be using a vpn tunnel.
now what we are finding is it's impossible to route traffic across this layer 3 tunnel because the subnets are the same. is there some way that i can do this without reassigning the subnet for the remote site? is there some way to propogate layer two across the routers and run spanning tree.
1) can you have this type of setup and make it work
2) can i do this without having to redo the entire subnet in question
3) can this be done with existing equipment that i've mentioned
4)will i still be able to use the DMVPN links that garnetbobcat was so helpful with creating.
As a side note i posted something about this about a month or two back but i don't think i was very clear on the situation.