Date: Wed, 29 Jun 2011 15:28:19 +0000 From: "Li, Qing" <qing.li@bluecoat.com> To: Oleg Cherevko <olwi@fb-n.l.org.ua>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: RE: ifconfig alias: same subnet netmask question Message-ID: <B143A8975061C446AD5E29742C531723098B9C@PWSVL-EXCMBX-01.internal.cacheflow.com> In-Reply-To: <4E0B406D.8070406@fb-n.l.org.ua> References: <4E0B406D.8070406@fb-n.l.org.ua>
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First of all, are you encountering any issues ? There is an outstanding issue with the address alias and improper routing table update that I am actively working on. --Qing > -----Original Message----- > From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd- > net@freebsd.org] On Behalf Of Oleg Cherevko > Sent: Wednesday, June 29, 2011 8:11 AM > To: freebsd-net@freebsd.org > Subject: ifconfig alias: same subnet netmask question >=20 > Hi All, >=20 > When describing the "alias" parameter ifconfig manpage claims that "If > the address is on the same subnet as the first network address for this > interface, a non-conflicting netmask must be given. Usually 0xffffffff > is most appropriate." >=20 > Taking into account that FreeBSD supports aliases from the same subnet > with identical netmask for 6+ years now, does this statement still make > sense? And what does this "conflicting netmask" stand for (I mean in > the > context of more or less recent FreeBSD versions, say 8.0+)? >=20 > Are there any drawbacks in setting aliases like this: > ifconfig em0 inet 192.168.1.1 netmask 0xffffff00 > ifconfig em0 inet 192.168.1.2 netmask 0xffffff00 > instead of traditional: > ifconfig em0 inet 192.168.1.1 netmask 0xffffff00 > ifconfig em0 inet 192.168.1.2 netmask 0xffffffff > (again, for more or less recent FreeBSD versions)? >=20 > -- > Olwi > _______________________________________________ > 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"
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