Date: Tue, 28 Aug 2007 16:13:54 -0500 From: Brooks Davis <brooks@freebsd.org> To: "Sean C. Farley" <scf@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: dhclient multiple aliases limitation Message-ID: <20070828211354.GA31137@lor.one-eyed-alien.net> In-Reply-To: <alpine.BSF.0.999.0708281533210.2740@thor.farley.org> References: <alpine.BSF.0.999.0708281533210.2740@thor.farley.org>
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[-- Attachment #1 --] On Tue, Aug 28, 2007 at 03:51:25PM -0500, Sean C. Farley wrote: > I currently have a setup on a laptop where I have two aliases that I > always want present. I would like to setup two aliases in > /etc/dhclient.conf to handle having the Ethernet cable plugged in after > boot, but dhclient has a limit of handling only one alias. > > /etc/rc.conf > ifconfig_xl0="DHCP" > ifconfig_xl0_alias0="inet 192.168.1.46 netmask 255.255.255.255" > ifconfig_xl0_alias1="inet 192.168.6.46 netmask 255.255.255.0" > > The first address uses an alias-type netmask while the second is a > private network I have for QEMU. > > I found that during PREINIT /sbin/dhclient-script is deleting the > 192.168.1.46 address when it runs this: > > ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 > up > > A possible solution that works for me is to add an "alias" to this line. > It appears to work, but I do not know if this would cause problems > elsewhere or for other scenarios. Does anyone see any problems with > this change? Off hand this sounds correct. We really want dhclient to leave any addresses other than ones it sets alone so always using alias directives is probably correct. -- Brooks > Sean > > P.S. Please Cc me since I am not on this list. > -- > scf@FreeBSD.org Content-Description: dhclient-script patch > --- /sbin/dhclient-script 2006-05-12 22:24:00.000000000 -0500 > +++ /etc/dhclient-script 2007-08-28 15:25:30.000000000 -0500 > @@ -223,7 +223,7 @@ > > PREINIT) > delete_old_alias > - ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 up > + ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 alias up > ;; > > ARPCHECK|ARPSEND) > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFG1JASXY6L6fI4GtQRAnMcAKDU9JDAOAuuXbaI6mUlzteWDx/07QCePzve d1akxJjvafNSup1bVIi77+I= =diYj -----END PGP SIGNATURE-----
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