I originally posted here and the issue appeared to be working (for several hours infact). But now the VPN is down again and I'm stuck. I've actually got this problem at 2 sites, both using ERL, both with WISP on WAN1 and DSL on WAN2. Using DSL for failover right now. Since the VPN kept dropping on the WISP, we tried moving the VPN to the DSL. Site 1 can ping from the router across the VPN, but not from the LAN to VPN. Site 2 cannot ping on either router to VPN or LAN to VPN. So I would use some help.