Hi There,
I have recently upgraded an ASA 5510 router at our office, which connects via a site-to-site tunnel to our Cardiff office. The router at our end has been upgraded to version 9.1(3), but the router in Cardiff is still running version 7.2(2).
Luckily we have a spare 5510, so i've configured that how our router was before the upgrade so our site-to-site link is running via that at present, but whenever I turn it off and attempt to use the upgraded router it won't work.
I have made sure that the pre-shared key is correct.
I've noticed that on version 7.2 it's IPSec enabled, but using 9.1 it's using IKE. Will we need to upgrade the other sites ASA to verion 9.1 in order to get the tunnel working properly?
Thanks