I have a TZ180 at the head of a network on the 10.10.11.0 subnet with the ip of 10.10.11.254. It directs traffic fine within this subnet and down through a router (10.10.11.1) out to the VPN (10.10.12.0, 10.10.10.0, etc.) without issue, however presently traffic will not apparently pass back up appropriately to the 10.10.11.0 subnet devices. This worked fine previously on a Linksys unit, so I'm assuming it is a configuration issue with the Route Policies on the TZ180 unit.
So, for example, presently a device at 10.10.12.50 cannot pass back through 10.10.12.1, 10.10.11.1 and on to 10.10.11.254 and then out to 10.10.11.50 when 10.10.11.50's gateway is set to 10.10.11.254, but it will work when 10.10.11.50's gateway is set to 10.10.11.1, which is the VPN router.
Here are the polices that are presently set on the SonicWall: