We have a handful of buildings all over town connected to the main office (building A) via point to point t-1s. For this we have used cisco 2600 routers using static routes. Works fine until now.
We have one building(building B) that is connected to our main building with the same point to point for access back to the main. But for political reasons they have their own cable internet using a sonic wall tz170 (and own IT guy sigh). Still no real issues. Internet traffic gets routed out the sonicwall, internal traffic out the cisco router.
Now the issue: that remote building(building B)as added a sub building(building C). This sub building also has a cable line and a sonic wall tz100. There is a vpn setup between the remote building and its sub building and that is working fine. Where I have issues is trying to route anything from the main building(building A) to the sub building(building C). With basic static routes I only manage to get all traffic from building a routed to building C out the cable internet in building B, never the vpn (going to building C)
After a bit of research I realized this may take a bit more them my basic Cisco knowledge.
Any help would be appreciated