I need your help to solve the below issues
The HO connected to the branch offices by site to site vpn tunnels. In both end PIX firewall which is located behind Inet router is acting as VPN tunnel termination point (GW).We are plaining to place the backup isdn PRI in HO and BRI in brinches for the vpn tunnel.
How is it possible to implement?
Tunnel on PIX and isdn on Edge Inet router. Please explain me the deployment