Date: Tue, 14 Nov 1995 13:18:05 -0500 From: "Garrett A. Wollman" <wollman@lcs.mit.edu> To: Justin Seger <shorty@iii.net> Cc: freebsd-questions@freebsd.org Subject: How do I setup IP aliases? Message-ID: <9511141818.AA23322@halloran-eldar.lcs.mit.edu> In-Reply-To: <199511132338.SAA18438@iii1.iii.net> References: <199511132338.SAA18438@iii1.iii.net>
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<<On Mon, 13 Nov 1995 18:38:19 -0500, Justin Seger <shorty@iii.net> said: > I want to setup multiple IP addresses for one ethernet card, specifically: > 199.232.47.49, 199.232.47.52, 199.232.47.53, 199.232.47.54 > My default is to ifconfig le0 to 199.232.47.49. I tried doing this: > ifconfig le0 alias 199.232.47.52 then setting up an arp entry: > arp -s 199.232.47.52 ethernetaddress pub I'm not sure where you got this idea from. Unfortunately I don't follow most of the mailing-lists or newsgroups so somebody may have been spreading this erroneous advice without giving me a chance to correct it (again). This should be in the FAQ. To support multiple IP addresses on a single interface, you must first examine the situation closely. In almost every situation, you will fall into one of these two cases: 1) Multiple logical IP subnets on a single wire. In this case, use the following commands: ifconfig de0 inet xxx.yyy.zzz.aaa netmask mmm.nnn.ooo.ppp ifconfig de0 alias inet bbb.ccc.ddd.eee netmask qqq.rrr.sss.ttt 2) Multiple logical IP hosts on the same IP subnet. In this case, use the following commands: ifconfig de0 inet xxx.yyy.zzz.aaa netmask mmm.nnn.ooo.ppp ifconfig de0 alias inet xxx.yyy.zzz.bbb netmask 255.255.255.255 -GAWollman -- Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ... wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance. Opinions not those of| It is a bond more powerful than absence. We like people MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant
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