On Apr 29, 2012, at 4:14, Kari Uusim ki <uusimaki at exdecfinland.org> wrote: DECnet must have been around at least from 1993, because the DECbrouter90's, which were practically Cisco routers in a DEChub90 module, were introduced in 1993. And they used IOS. What I haven't found out is when the IP tunnels were introduced in the IOS. It seems to be in IOS 11.2. So it is included in all recent versions, but the Cisco 2500's have limited flash and RAM capabilites. Therefore the recent IOS's cannot be used with older hardware. I suppose the IOS 11.2 should be sufficient for tunneling DECnet over IP. The 2500s can easily run 12. I have to check which versions I have on my 2500's. Most probably they have an IP-only version of the IOS. I bought the 2500's cheap from a local broker a few years ago. There are a handful of versions that have DECnet. It's likely you have ip only though but who knows. Either way, we can get you what you need. Regards, Kari On 29.4.2012 9:27, hvlems at zonnet.nl wrote: We used a Cisco MGS in a project to connect a token ring network to the plant ethernet. The only protocol used on both LAN's was DECnet. The MGS box acted as a phase IV circuit router. This was in 1993. IIRC the DECnet implementation was quite new and we encountered a couple of minor problems. So I guess that DECnet is available on anything you have running. Hans -----Original Message----- From: Brian Hechinger<wonko at 4amlunch.net> Sender: owner-hecnet at Update.UU.SE Date: Sat, 28 Apr 2012 21:06:51 To:<hecnet at Update.UU.SE> Reply-To: hecnet at Update.UU.SESubject: Re: [HECnet] GRE tunnel working! On 4/28/2012 2:49 PM, Dave McGuire wrote: On 04/28/2012 02:38 PM, Brian Hechinger wrote: I would be extremely surprised to find that both GRE and DECnet weren't to be found in 11 let alone 12. It's more likely to be a feature set issue. It's definitely a feature set issue. The last time I did anything with GRE (before this anyway) was between a 2501 and an AGS+; the former was running IOS 10 and the latter 11. DECnet support in IOS goes back a good bit before that, which shouldn't be surprising given the history (and reason for existence) of Cisco. I don't think getting GRE support should be an issue, I believe that's included in all versions, you just have to make sure you get the right version for DECnet. Cisco has a feature navigator tool on their website. That can be used to figure it out. I've not tried that yet. That sounds very handy. http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp The CCIE at work pointed me to that. Very helpful. -brian