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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!howland.erols.net!news.mathworks.com!news.pbi.net!samba.rahul.net!rahul.net!a2i!busch.a2i!busch From: Rainer Busch <busch@rahul.net> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Alias on ethernet interface Date: 12 Dec 1996 10:09:25 GMT Organization: a2i network Lines: 20 Message-ID: <58olkl$j4p@samba.rahul.net> NNTP-Posting-Host: bolero.rahul.net NNTP-Posting-User: busch X-Newsreader: TIN [version 1.2 PL2] Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:32447 This is one for the networking experts: we are changing our provider. Now I want to be able to receive e-mail etc. for some time at the new as well as the old internet address. Both lines and routers are active. Now I changed the address of ed0 to the new address, and aliased the old: ifconfig ed0 addr.in.new.addrspace netmask 0xfffffff0 ifconfig ed0 addr.in.old.addrspace netmask 0xfffffff0 Both addresses can be pinged from in- and outside now. This works fine so far for some time. But then - I guess some dynamic routing kicks in - ed0 kinda "forgets" its primary, and flips over to the other (aliased) one. This conflicts with the default route, of course, and - bang - the machine is off-net. Any suggestions to resolve this cleanly ? Rainer