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From: rbr@dl.ac.uk (R.Bradshaw)
Newsgroups: comp.protocols.tcp-ip,comp.unix.bsd,comp.unix.ultrix
Subject: Re: How do multi-homed hosts choose the interface?
Followup-To: comp.protocols.tcp-ip,comp.unix.bsd,comp.unix.ultrix
Date: 24 Feb 1994 21:00:24 GMT
Organization: SERC Daresbury Lab, Warrington, U.K.
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Anthony Heading (heading@signal.dra.hmg.gb) wrote:
: Hello.
: I'm really puzzled by this. We have several hundred hosts on
: a class B ethernet, and a few on a class C FDDI net, the routing
: being done by one of two machines (an OSF/1 alpha and an Ultrix
: DECstation) which have interfaces on both networks. The nameserver
: has multiple A records for these machines - we hope to avoid
: giving different hostnames to the different interfaces.
Just to confirm; your network looks like this:
FDDI ring
--------------------------------------
| Iaf | Iuf
Alpha Ultrix
| Iae | Iue
-------------------------------------
ethernet
: I want the two routing machines to use the FDDI network to
: talk to each other, but they steadfastly refuse to use anything
: but the ethernet. I've tried setting the interface metrics (which
: doesn't work) and reversing the boot time configuration order in
You need to set up explicit routes. If you are using static routes,
then try:
on Alpha: route add Iue Iuf 1
on Ultrix: route add Iae Iaf 1
If you are running dynamic routing, you'll need to do the equivalent
in gated/routed/whatever. Your netstat tables should then show these
as host routes.
: Any clues, speculation or even hard answers appreciated...
: Thanks
: Anthony
--
Rob Bradshaw Email: R.Bradshaw@dl.ac.uk [rb685]
Tel: +44 925 603226 | Fax: +44 925 603230
Networks Group, Daresbury Lab, Warrington, WA4 4AD, England