conf/166770: We do not need the "ifdisabled" flag on gif Interface.

[Yoshikazu GOTO]

>Number:         166770
>Category:       conf
>Synopsis:       We do not need the "ifdisabled" flag on gif Interface.
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr 09 00:20:15 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Yoshikazu GOTO
>Release:        9.0-STABLE
>Organization:
>Environment:
FreeBSD **** 9.0-STABLE FreeBSD 9.0-STABLE #0: Mon Apr  9 02:12:04 JST 2012     root@****:/usr/obj/usr/src/sys/KERNEL  i386
>Description:
I wrote the /etc/rc.conf file for IPv6 on 9-STABLE machine, as following:

----
ipv6_defaultrouter="-interface gif0"
ifconfig_em0="inet <IPv4 address>  netmask <Netmask>"
ifconfig_em0_ipv6="inet6 <IPv6 address> prefixlen 64"
gif_interfaces="gif0"
gifconfig_gif0="<IPv4 address> <Destination IPv4 address>"
----

but I cannot send any IPv6 packets.

>How-To-Repeat:
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
        tunnel inet **** --> ****
        inet6 fe80::****%gif0 prefixlen 64 tentative scopeid 0x4
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        options=1<ACCEPT_REV_ETHIP_VER>
$ ping6 www.kame.net
PING6(56=40+8+8 bytes) **** --> 2001:200:dff:fff1:216:3eff:feb1:
44d7
ping6: sendmsg: Network is down
ping6: wrote orange.kame.net 16 chars, ret=-1
ping6: sendmsg: Network is down
ping6: wrote orange.kame.net 16 chars, ret=-1
^C
--- orange.kame.net ping6 statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss

>Fix:
So, I run a command "ifconfig gif0 inet6 -ifdisabled", I can send the IPv6 packets.

Please add this command line to "gif_up()" function in /etc/network.subr file.


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