Date: Thu, 22 Nov 2001 21:50:02 +0100 From: Jean-Yves Lefort <jylefort@brutele.be> To: Juan Luis Baptiste <p3rr0@hotmail.com> Cc: freebsd-questions@FreeBSD.org Subject: Re: IPv6 autoconfiguration Message-ID: <20011122215002.A40477@jsite.lefort.net> In-Reply-To: <F168wPPAIRdboPg7IU200023d87@hotmail.com>; from p3rr0@hotmail.com on Thu, Nov 22, 2001 at 02:11:01PM %2B0000 References: <F168wPPAIRdboPg7IU200023d87@hotmail.com>
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On Thu, Nov 22, 2001 at 02:11:01PM +0000, Juan Luis Baptiste wrote: > Why do you want to get rid of that addresses? fe80 are link local addresses, > and are the representation of the MAC address in EUI-64 format. And as far > as I know, the are used for neighbor discovery and autoconfiguration > purposes. > > >From RCF 2461: > > link-local address > - a unicast address having link-only scope that can be > used to reach neighbors. All interfaces on routers > MUST have a link-local address. Also, [ADDRCONF] > requires that interfaces on hosts have a link-local > address. > > > Hope this helps, > > Juan Luis Baptiste M. > http://www.merlinux.org > > >From: Jean-Yves Lefort <jylefort@brutele.be> > >To: freebsd-questions@FreeBSD.org > >Subject: IPv6 autoconfiguration > >Date: Wed, 21 Nov 2001 21:57:40 +0100 > > > >Hi all, > > > >Previously addresses in the form fe80*%<if_name> were assigned > >automatically > >to my IPv6 network interfaces. Having read that those fe80 addresses are > >used > >by IPv6 configuration, and having decided that I don't need this feature, I > >have been able to disable the automatic assignation by appending the > >following > >line in my /etc/sysctl;conf: > > > >net.inet6.ip6.auto_linklocal=0 > > > >After a system reboot, the move seemed to be successfull for all interfaces > >*but* the loopback interface: > > > ># ifconfig lo0 > >lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 > > inet6 ::1 prefixlen 128 > > >>>> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2 <<<< > > inet 127.0.0.1 netmask 0xff000000 > > > >Is there a way (other than ifconfig delete) to get rid of that address? > > > >Best regards, > >Jean-Yves Lefort I want to get rid of that address because I don't need autoconfiguration since I manually assigned IPv6 addresses to all the hosts of my network. Moreover, even if I wanted to use autoconfiguration, I think that the loopback interface (the one which still keeps a link local address as stated in my previous mail) really doesn't need autoconfiguration nor neighbour discovery, since its address will _always_ be ::1/128. I just wanted to know how to get rid of the lo0 link local address using the *neat* way (if there is one), because deleting it in a boot script using 'ifconfig delete' doesn't seems to be a neat way for me. Thanks for your help, Jean-Yves Lefort To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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