I have a PIX firewall at SiteA and a Cisco 1720 router at SiteB. I have setup a VPN tunnel between these 2 sites. I have setup another Cisco 1720 at SiteA for redundancy which connects to a seperate ADSL line.
I would like to setup another VPN tunnel, but between the 1720 at SiteA and the 1720 at SiteB. This Tunnel is only to be used in case the Tunnel between the PIX and the 1720 fails.
What would be the best way of doing this? Would I just configure the crypto map at siteB with a second peer? Or would I create a seperate crypto map altogether? I need this second VPN tunnel to be an active standy tunnel.