From owner-freebsd-bugs  Wed Jan 10 18:30:22 2001
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Message-Id: <200101110220.f0B2KqI04671@ussenterprise.ufp.org>
Date: Wed, 10 Jan 2001 21:20:52 -0500 (EST)
From: bicknell@ufp.org
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Subject: conf/24238: First physical interface always has IPv6 link local address.
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>Number:         24238
>Category:       conf
>Synopsis:       First physical interface always has IPv6 link local address.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 10 18:30:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Leo Bicknell
>Release:        FreeBSD 4.2-RELEASE i386
>Organization:
>Environment:

FreeBSD ussenterprise.ufp.org 4.2-RELEASE FreeBSD 4.2-RELEASE #0: 
Fri Jan  5 14:05:35 EST 2001     
root@ussenterprise.ufp.org:/usr/src/sys/compile/USSENTERPRISE  i386

Kernel compiled for IPv6/IPSec.

>Description:

	The first physical interface (fxp0 in my case on a box with fxp0
and fxp1) always gets an IPv6 link local address, even if IPv6 is disabled
in /etc/rc.conf.

	Note, this causes big issues when trying to configure the first
interface (fxp0) as IPv4 only and the second interface (fxp1) as IPv6
only.

>How-To-Repeat:

	Try this config in /etc/rc.conf:


network_interfaces="fxp0 lo0"
ifconfig_fxp0="inet 209.249.106.101 netmask 255.255.255.240"
defaultrouter="209.249.106.97"
ipv6_enable="NO"
hostname="ussenterprise.ufp.org"

	After booting, ifconfig fxp0 will show an IPv6 link local address,
like this:

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 209.249.106.101 netmask 0xfffffff0 broadcast 209.249.106.111
        inet6 fe80::2e0:18ff:fe02:6f07%fxp0 prefixlen 64 scopeid 0x1 
        ether 00:e0:18:02:6f:07 
        media: autoselect (10baseT/UTP) status: active
        supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/UTP <full-duplex> 10baseT/UTP

>Fix:

	Unknown.  Suspect something in the kernel initialization, as
making /etc/rc.network6 an empty file does not change the behavior.



>Release-Note:
>Audit-Trail:
>Unformatted:


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