On 2015-01-03 02:00, Dave McGuire wrote: On 01/02/2015 07:58 PM, Johnny Billquist wrote: It does scale better. However, it is possible to bridge LAT and/or MOP over the link also. Ah. Cool. I wasn't sure if it would also bridge other protocols, since these are not related to DECnet as such. One can tunnel most anything over GRE, even raw Ethernet frames, regardless of the higher-level protocols. Hence the 'G' for "Generic". Yes. But you need some ingress and egress that makes use of it. Or else we could just as well argue that UDP can tunnel anything. ...which it can. ;) On a Cisco, assigning a DECnet cost to an interface (and a GRE endpoint is a pseudo-interface on a Cisco) forms that ingress/egress. (I know YOU know this; I'm saying it for the benefit of those here who are just learning about this) Actually, I don't know the details, even though I pretty much know how it *could* be done. I've pretty much never actually worked on a Cisco box. :-) However, DECnet costs cannot possibly be related, as we're now not talking about DECnet protocols. (LAT and MOP are not using DECnet...) You need to somehow tell the Cisco box to grab all ethernet packets with a certain protocol number, and pass those on over the tunnel, and have the other end do the reverse. (Pretty much just the same as my bridge program does...) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol