On Tue, Jul 2, 2013 at 10:19 AM, Cory Smelosky <b4 at gewt.net> wrote: On Mon, 2 Jul 2013, Tim Sneddon wrote: If you're going to have a GRE tunnel between your two sites, why not just route IP over that? Regards, Tim. IPSec. ;) True, but your DECnet links are not protected by encryption... Regards, Tim.