Hello, I have a brand new pair of 851w's with ios version 12.4(15)T7. I cannot seem to get a site to site vpn established, I have been able to use these 800 series seccessfully in the past. I have stripped the configs down to the bare essentials and still cannot get established.
When I do a show crypto session it all looks correct but the connection is "down"
I am not 100% sure about my crypto transform
"crypto ipsec transform-set AES-SHA-compression esp-aes esp-sha-hmac comp-lzs" I am not sure the 800 series will support the encryption or if I should uses something else.
I have attached the configs.
You need to change the config from :-
ip nat inside source list 1 interface FE4 overload
ip nat inside source route-map nonat interface FastEthernet4 overload