I was wondering if you kind people wouldn't mind helping me?
I have a router at a remote site (let's call it site A) which over ADSL connects to our HQ via VPN, site A has an 857 router and the HQ has a 3000 concentrator. We have another couple of sites with different or older routers, 837, 1751 etc. All the sites use the same config, only IP's and key changes.
Only site A however doesn't keep it's VPN up, and the VPN will only establish itself if I create the connection from the HQ (I ping site A IP address from HQ). If I connect to the router over ADSL and I ping tyhe corporate network ensuring that the source address is site A it still doesn't bring the VPN up. Since the config is exactly the same on the 3000 as the other VPN's I assume the problem must lie with the 857 and some config line that's either not there or is incorrect.
I've attached the running config, sh ver and sh diag.