Hi. I'm after some general advice on how to set up a redundant VPN tunnel.
We have an Cisco 1801 device at a remote site with a primary ADSL connection and an ISDN backup. The 1801 is setup so that it sould fail over to the ISDN line should ADSL fail. The 1801 also has a site-to-site VPN to a Pix 515e (using s/w v7.2) over the ADSL line.
I would like to set up the 1801 with a redundant site VPN over the ISDN that will switch over if ADSL fails and switch back when ADSL resumes.
Any guidance on how best to achieve this would be greatly appreciated.