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- From: goathunter@wkuvx1.bitnet
- Newsgroups: vmsnet.networks.misc,vmsnet.misc,comp.os.vms
- Subject: Q: Extending Ethernet over fiber
- Message-ID: <1992Nov12.074211.3898@wkuvx1.bitnet>
- Date: 12 Nov 92 07:42:10 CDT
- Organization: Western Kentucky University, Bowling Green, KY
- Lines: 44
-
- We have a VAX 6320 with a small Pathworks LAN running over Thinwire
- Ethernet; this is in one building. The 6320 and two DECserver 500s
- are connected to a DELNI that's connected to a DESPR. I plan to
- eventually remove the DELNI from that configuration, I think. We'd
- like to extend our Ethernet in two different ways as cheaply as
- possible (of course).
-
- I have two configuration questions for those of you who know about
- Ethernet.
-
- o The building housing the above LAN is connected to another
- building via fiber optic cable, but it's not being used yet.
- We have a Novell LAN in that building, as well as a DECsystem
- 5100 and a VAX 11/785. We'd like to extend the 6320 LAN to
- include at least the DECsystem and the 11/785, with the Novell
- LAN being a nice added bonus.
-
- The question: if we buy two Fiber Media Access Units (DEFLM-AA)
- as advertised on page 105 in the new DECdirect catalog, can we
- connect the 6320 and the remote systems without purchasing any
- additional equipment (routers, bridges, etc.)? If so, do you
- have any suggestions for configuration? The remote building is
- about 500 feet away; the Pathworks LAN is currently about at its
- length limit. Approximately 200--300 feet run between the
- DECsystem and the 11/785; the DECsystem is currently connected
- to the Novell LAN.
-
- It appears that the DEFLM would let us go from Ethernet -> DEFLM
- -> fiber -> DEFLM -> Ethernet.
-
- o We have another Novell LAN (Thinwire Ethernet) in the same building
- as the 6320. It too has reached its maximum length. Naturally,
- we'd like to connect the Novell LAN and the Pathworks LAN. Will
- that work if the DESPR is replaced with a DEMPR? How about just
- connecting a gateway to the DELNI now? Would that work?
-
- Thanks in advance for any help you can provide. No one around here
- (including our DEC reps) has had much experience with the limits of
- Ethernet.
-
- Hunter
- ------
- Hunter Goatley, VMS Systems Programmer, Western Kentucky University
- goathunter@WKUVX1.BITNET, 502-745-5251
-