Site A: Sonicwall NSA 2600; Site B: Sonicwall 2650
The VPN tunnel shows as up on both sides, but I'm not able to ping site to site. I noticed if I rename the network object for Site B (zone: VPN, type: network; 192.168.28.0/24) on the Site A's router, the ping works for about a minute, then stops responding again. The tunnel would still be up though. The packet capture shows "consumed" when pings work and "received" when it stops working. If I again rename the object for Site B back to what it was, ping works again for about a minute, then stops responding.
One other observation. If I re-create a tunnel on either router, I can connect site to site and pings work. However, in about a day or so, the same issue again when tunnel shows as up, but I can't connect from site to site.
I saw another post about similar issue where resolution was...