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- Newsgroups: vmsnet.networks.misc
- Subject: Re: Running DECnet over multiple Ethernet adapters
- Message-ID: <1992Nov6.192244.3956@arizona.edu>
- From: leonard@telcom.arizona.edu (Aaron Leonard)
- Date: 6 Nov 92 19:22:41 MST
- Reply-To: Leonard@Arizona.EDU
- References: <BxB1tq.FFw@micrognosis.co.uk>
- Distribution: world,local
- Organization: University of Arizona Telecommunications
- Nntp-Posting-Host: penny.telcom.arizona.edu
- Lines: 41
-
- In article <BxB1tq.FFw@micrognosis.co.uk>, nreadwin@micrognosis.co.uk (Neil Readwin) writes:
- |
- | Can you run DECnet over multiple Ethernet adapters? If so, under what
- | conditions? Would it work with:
- |
- | 1) 2 adapters on the same piece of wire with every node in the
- | same area?
-
- No. A DECnet Phase IV node can't have two interfaces on the same Ethernet,
- because DECnet embeds the node's network-layer address in the interface's
- Ethernet "physical" address so that it doesn't have to use ARP or something
- like it. So you would wind up with two interfaces on the same Ethernet
- with the same Ethernet address which won't work.
-
- | 2) 2 adapters on 2 networks with every node in the same area?
-
- Sure, this would be the usual way to do it.
-
- | 3) 2 adapters on 2 networks with a different area for each node?
-
- This would work too (assuming that you made each node an area [level 2]
- router), but it would be perverse.
-
- | If anyone can point to a section of the Networking Manual that I have missed
- | then please do so :-) Neil.
-
- I'm afraid I don't know whether I've seen this stuff in any manual.
-
- Might I ask why you would want to do this? Your ordinary DECnet guys
- just buy bridges if they want to partition their network. (And a bridge
- will pass traffic better than any VAX will, and reboot faster.)
-
- Best,
-
- Aaron
-
- Aaron Leonard (AL104), <Leonard@Arizona.EDU>
- University of Arizona Network Operations, Tucson AZ 85721
- "It's not a bug, it's a form of flow control."
- - Jerry Leichter on why crash-prone Unix is a suitable
- platform for NSFNET core routers
-