gamiddleton@thunder.UUCP (Guy Middleton) (05/28/85)
Sorry if this is a dumb question.
It it possible to run both (for instance) XNS and TCP/IP on a single
ethernet? How about DECNET as well? Is anybody doing this?
--
Guy Middleton, Lakehead University, Thunder Bay, Ont.
..{allegra,clyde,decvax,utcsrgv}!watmath!thunder!gamiddleton
..ihnp4!mmm!thunder!gamiddletonmark@tove.UUCP (Mark Weiser) (06/02/85)
In article <222@thunder.UUCP> gamiddleton@thunder.UUCP (Guy Middleton) writes: >Sorry if this is a dumb question. >It it possible to run both (for instance) XNS and TCP/IP on a single >ethernet? How about DECNET as well? Is anybody doing this? >-- > Guy Middleton, Lakehead University, Thunder Bay, Ont. > ..{allegra,clyde,decvax,utcsrgv}!watmath!thunder!gamiddleton > ..ihnp4!mmm!thunder!gamiddleton At Maryland we run XNS and TCP/IP on the same cable via the same interface via hacks to 4.2bsd. -mark -- Spoken: Mark Weiser ARPA: mark@maryland Phone: +1-301-454-7817 CSNet: mark@umcp-cs UUCP: {seismo,allegra}!umcp-cs!mark USPS: Computer Science Dept., University of Maryland, College Park, MD 20742
ry@cadre.ARPA (Russell J. Yount) (06/03/85)
In article <222@thunder.UUCP> gamiddleton@thunder.UUCP (Guy Middleton) writes: >Sorry if this is a dumb question. >It it possible to run both (for instance) XNS and TCP/IP on a single >ethernet? How about DECNET as well? Is anybody doing this? >-- Yes, it is quite possible to run mutiple protocols on the same ethernet. We run both IP, CHAOSNET, and PERQ protocals on our local ethernet. As long as all the different protocols are using different ethernet packet types with the possible exception of a common ARP (address resolution protocol) coexistance on same ethernet is easy. Beware however some Vendors seem to claim any ethernet packet type as there own (this is a very poor choice and not to spec.) Also some vendors protocals tend to use broadcast packets way to much, this may affect preformance of other machines on same ethernet by keeping their interfaces busy (and cases heavy DMA/interrupt loads) when packets are not used on that machine anyway and just thrown out.
bob@ulose.UUCP ( Bob Bismuth ) (06/03/85)
> Sorry if this is a dumb question. > It it possible to run both (for instance) XNS and TCP/IP on a single > ethernet? How about DECNET as well? Is anybody doing this? No it's not such a dumb question - computer sales people and marketing people frequently have the misconception that only 1 protocol type can be used under the ethernet container protocol. This quite often gets passed onto ethernet users. You can have several protocol types in use on a single ethernet at once. That is a design feature/goal of the ethernet "standard". Here at CADMUS we run both TCP-IP and our own distributed file system protocol (UNISON) concurrently. UNISON is completely independent from TCP-IP. At the winter UNIFORUM, DEC was running both TCP-IP and DECnet over the building ethernet. Of course, the only systems responding to the DECnet protocol type were their ULTRIX systems and their token VMS system ... -- Bob (decvax!ulose!bob) (Note, UNISON is a trademark of CADMUS and ULTRIX and VMS are trademarks of Digital Equip. Corp.)
henry@utzoo.UUCP (Henry Spencer) (06/04/85)
Given that multiple protocols can co-exist if their type numbers don't
clash, does anybody have a list of in-use type numbers? The mumbles
in my old copy of the Ethernet spec suggest that Xerox was trying to
maintain a master list; is it accessible? Failing that, does anybody
know if there are specific protocol number(s) reserved for site-specific
protocols? We may have to implement one, and I'd prefer to leave the
door open to TCP/IP etc. on the same Ethernet.
--
Henry Spencer @ U of Toronto Zoology
{allegra,ihnp4,linus,decvax}!utzoo!henryrandy@bcsaic.UUCP (randy groves) (06/05/85)
In article <222@thunder.UUCP> gamiddleton@thunder.UUCP (Guy Middleton) writes: >Sorry if this is a dumb question. >It it possible to run both (for instance) XNS and TCP/IP on a single >ethernet? How about DECNET as well? Is anybody doing this? We are running TCP/IP, XNS, Ungerman/Bass, Sun ND (I think this is a TCP clone), and DECNET all on the same ethernet cable. All but TCP/IP have been running for months. So far so good. -- Randy Groves
striepe@muscat.UUCP (Harald Striepe) (06/06/85)
> Sorry if this is a dumb question. > It it possible to run both (for instance) XNS and TCP/IP on a single > ethernet? How about DECNET as well? Is anybody doing this? > -- > Guy Middleton, Lakehead University, Thunder Bay, Ont. > ..{allegra,clyde,decvax,utcsrgv}!watmath!thunder!gamiddleton > ..ihnp4!mmm!thunder!gamiddleton We are running quite a number of DECnet systems (VMS and Ultrix) as well as TCP/IP. No problems. It really works... -- Harald Striepe DEC Western Region TBU decwrl!muscat!striepe decwrl!dec-rhea!dec-wer521!striepe WER521::STRIEPE
jmg@cernvax.UUCP (jmg) (06/07/85)
In article <222@thunder.UUCP> gamiddleton@thunder.UUCP (Guy Middleton) writes: >Sorry if this is a dumb question. >It it possible to run both (for instance) XNS and TCP/IP on a single >ethernet? How about DECNET as well? Is anybody doing this? >-- Perfectly possible. We have managed all of DECNET, TCP/IP, XNS and private protocols, on a mixture of transceiver types, controllers, computers etc. We have even added in ISO 8802/2 style packets (protocol ID field replaced by length field). One main worry is to avoid protocols which make widespread use of broadcast and multicast packets (i.e. send lots at frequent intervals).
chris@umcp-cs.UUCP (Chris Torek) (06/08/85)
>>It it possible to run both (for instance) XNS and TCP/IP on a single >>ethernet? How about DECNET as well? Is anybody doing this? >We are running TCP/IP, XNS, Ungerman/Bass, Sun ND (I think this is a TCP >clone), and DECNET all on the same ethernet cable. Sun's ND is stuck on top of IP, same as TCP and UDP. It's protocol # 77. (That's an unoffical number, by the way, and conceivably could get preempted any time... but that's pretty unlikely.) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251) UUCP: seismo!umcp-cs!chris CSNet: chris@umcp-cs ARPA: chris@maryland