This doesn't require much horsepower; a 2500 should be more than enough. I don't recall when GRE was introduced in IOS, but it's nowhere near recent. We'll just have to figure out which 2500 IOS release has both GRE and DECnet support. -Dave On 04/28/2012 01:23 PM, Kari Uusim ki wrote: I'm interested in that option as well. I have a couple of Cisco 2500's. Which IOS version is needed? Regards, Kari On 28.4.2012 20:14, Brian Hechinger wrote: Dave McGuire and I have a GRE tunnel with decnet routed over it on our cisco routers. It works! It's easy, too! If you have a cisco router and want to play let me know. If you don't have the right version of IOS I can get it for you. -brian . -- Dave McGuire, AK4HZ New Kensington, PA