VPN Tunnels using VLSM
Posted on 2008-10-10
At my HQ office I have a Cisco ASA 5510 with several vpn tunnels from remote offices. I have just installed ASA 5505s at 4 new remote offices with one to three users each. With so few users, i decided to use networks with a /28 subnet mask (255.255.255.240), giving each location 14 usable addresses. the first office has network 10.10.0.0, the next is network 10.10.0.16, then 10.10.0.32 and 10.10.0.48. With this setup, I'm having trouble creating the tunnels. I've set many of these up before, but these tunnels won't come up... and I'm not sure how to troubleshoot. I set both ends pointing to the static ip of the peer, use the same authentication key, but they won't come up.... Is there something special you have to do when the networks aren't given a full class c subnet, 255.255.255.0???? I'm stumped...