Linksys RV082 VPN tunnels won't stay up
I have 4 sites all have RV082s running the latest firmware 1.1.5. I have gateway to gateway vpn tunnels from every site to every other site so each router has 3 tunnels defined on it. I have keepalive, aggresive mode, dead peer detection and NetBIOS broacdastin checked in the advanced properties the Phase I and Phase II settings are default and the settings are the same for every tunnel at every site. We determined the optimum MTU for each site by doing ping -f -l until we got unfragmented replies. Still our tunnels don't stay up. Over the last 2 days the most problematic has been site 1 (this site is a Savvis POP so it has the cleanest internet connection and the closest to the internet backbone) and site 2 (TimeWarner Roadrunner cablemodem). Site 3 (Adlelpia cable modem) and Site 4 (Optimum Online cablemodem) seem to stay up and connected to themselves as well as Site 1. Site 2 seems to stay connected to Site 3 but site 2 loses connection to Site 4 a good bit (not as bad as Site 1 to Site 2 though). When the tunnels are disconnected I can still ping the WAN interface of the routers where the tunnel is terminated. Additionally I have Anyway I've used the RV082s in the past establishing Site-to-Site VPNs with a Cisco VPN3015 and that worked quite nicely. Now I don't have the luxury of the 3015 and I've read posts from alot of people who are doing exactly what I'm doing and don't seem to have the problems I'm having. Any thoughts, suggestions or comments (other than Linksys sux) would be greatly appreciated!