CSC Facebook user posted this question earlier today. http://www.facebook.com/CiscoSupportCommunity?ref=sgm
I have 3 routers 1812. Sites B & C are connected to site A via VPN. I need to set up backup via ISDN line (1 B channel for both B & C sites). Will the VPN still work ? Any sample of how to configure this ?
I have this problem too.