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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!osuunx.ucc.okstate.edu!moe.ksu.ksu.edu!ux1.cso.uiuc.edu!howland.reston.ans.net!darwin.sura.net!news.dfn.de!mailgzrz.TU-Berlin.DE!gmdtub!ceres.fokus.gmd.de!jbm From: jbm@fokus.gmd.de (Joerg Micheel) Newsgroups: comp.unix.bsd Subject: Re: HELP: How to have 2 Host IP nums but only 1 interface Keywords: interface ip network routing host sun Message-ID: <1993Jul15.092609.3906@fokus.gmd.de> Date: 15 Jul 93 09:26:09 GMT References: <mckay.742682655@cambridge> Sender: news@fokus.gmd.de (News system) Organization: GMD-Fokus (Berlin) Lines: 23 In article <mckay.742682655@cambridge>, mckay@cambridge.mitchell.com (Kyle McKay) writes: |> If you had two ethernet interfaces installed in a sun and attached them |> both to the same cable with different host ip numbers on different ip |> networks, you would have the situation I need. |> |> However, I want to do this with just the one ethernet interface, how can I |> do that? As far as I know, SunOS 4.1 (and other BSD derived systems) simply doesn't allow you do bind multiple IP addresses to one network interface. The reason is probably not, that it is too hard to implement (although several admin tools have to be changed as well as IP code and the network drivers itself), but there are situations, where you really don't know, which IP address to pick (during connection establishment, ARP and IP processing). Could someone else comment this in more detail ? Joerg -- GMD German National Research Corporation for Mathematics and FOKUS Data Processing - Research Institute for Open Communication Systems Berlin, Germany