Date: Tue, 27 Apr 1999 10:12:30 +0200 From: Matthias Meyser <Matthias.Meyser@harz.de> To: freebsd-questions@FreeBSD.org Subject: Re: Problem with ifconfig aliases Message-ID: <19990427101230.C5468@xenetserver.harz.de> In-Reply-To: <Pine.GSO.4.10.9904262022020.2697-100000@shell.xecu.net>; from Andy Dills on Mon, Apr 26, 1999 at 08:33:11PM -0400 References: <Pine.GSO.4.10.9904262022020.2697-100000@shell.xecu.net>
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Hi On Mon, Apr 26, 1999 at 08:33:11PM -0400, Andy Dills wrote: > I have no problems bringing up IP aliases on reseller2, using this as my > command: > > ifconfig ep0 inet <ip> netmask 255.255.255.248 alias > > However, whenever I try to do this on reseller3, I get: > > reseller3# ifconfig ep0 inet 208.244.234.134 netmask 255.255.255.248 alias > ifconfig: ioctl (SIOCAIFADDR): File exists I had the same problem. The first ifconfig (main address) adds a route for the networkpart of your address to go via this interface and adds a route for the localadress to go through 127.0.0.1. If you do an alias with an Address from the same network ifconfig trys the same thing but can`t set the first route because ist already there. The scound one ist the omitted. > It then shows up in the ifconfig -a: > ep0: flags=8847<UP,BROADCAST,DEBUG,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 208.244.234.132 netmask 0xfffffff8 broadcast 208.244.234.135 > inet 208.244.234.134 netmask 0xfffffff8 broadcast 208.244.234.135 > ether 00:20:af:1b:0c:97 > > However, the ip address is unpingable or unreachable in any way. This is > not the case with reseller2, which is running the same release (as shown > above) and is using the same type of ethernet card. You should be able to ping each machine be each other only local ping should not work. > Does anybody have any suggestions as to how I can correct or debug this? IF an aliased IP is on the same network as another IP use a netmask of 255.255.255.255 for that IP. CU matthias -- \\ // N N EEE TTT Matthias Meyser, Meyser@harz.de \\ // eee NN N E T Gesellschaft fuer Informations- und \X/ e e N N N EE T Kommunikationssysteme mbH // \\ e ee N NN E T 38678 Clausthal-Zellerfeld, Burgstaetter Strasse 6 // \\ eeee N N EEE T Telefon: +49-5323-94018 Fax: +49-5323-94011 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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