I wish to build 2 GRE/IPsec tunnels from a 2811 (IOS 12.4(3g)) running to 2 differing PIXes which are located in the same place (1 is a 505 running 6.3(4) and the other a 515e running 7.2(1)).
One tunnel will be used as primary and run over a Serial interface and the other a backup and run over a DSL interface.
Can anyone provide me with some examples as I believe at least one of the PIXes can't support GRE tunnel termination because of code? Additional notes: the 506 currently does PPTP with dhcp assigned addresses and the 515e l2tp with dhcp assigned addresses
Additionally this is my first time setting this sort of thing up. Wouldn't be so confusing or difficult if I could do router to router, but in my case I have 2 differing PIXes and varying code support so could use some solid examples to either do GRE/IPsec tunnels or a combination of that and a vanilla IPsec tunnel given the code and equipment I am working with.
Thanks for the help.