Using a Cisco 1711 as a remote talking to a hub. Using GRE+IPSEC tunnels to communicate and establish EIGRP neighbor adjacencies. Tunnels go down after it appears the crypto tunnels go down. By simply pinging the gateway(modem) everything comes up immediately, then it goes down again. The GW ip address is staying the the 1711's arp cache. Any ideas out there as to what is going on? Faulty modem?