I just upgraded our 2 T1s to a 10MB Metro Ethernet Circuit. All went really well except that VPN was not working after the upgrade. I power cylced the VPN Box and it came up and VPN was working, in the hour that it took me to drive home it stopped working again. I upgraded to a 10MB Metro Ethernet from ATT and am using a CiSco VPN 3000 concentrator. The upgrade kept the same IPs and everything. I mad no changes. Any thoughts on why this is happening. I will be going out there to reboot the VPN again but what if it does not continue to work. They changed the router to a Nortel Router.