kern/119396: ip6 accept_rtadv on if_bridge interface

[Meno Abels]

>Number:         119396
>Category:       kern
>Synopsis:       ip6 accept_rtadv on if_bridge interface
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jan 06 20:40:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Meno Abels
>Release:        6.2-RELEASE-p9
>Organization:
ADVISER COM
>Environment:
FreeBSD apix01.ham.amango-int.net 6.2-RELEASE-p9 FreeBSD 6.2-RELEASE-p9 #3: Tue Dec 25 09:05:09 CET 2007     root at apix01.ham.amango-int.net:/usr/obj/usr/src/sys/SMP  i386

>Description:
If i have a bridge interface where ip6 autoconfiguration doesn't work on this. My ifconfig looks like this:
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 172.29.30.3 netmask 0xffffff00 broadcast 172.29.30.255
        ether e2:e4:1a:9e:ef:b7
        priority 32768 hellotime 2 fwddelay 15 maxage 20
        member: vlan30 flags=3<LEARNING,DISCOVER>
vlan30: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::213:8fff:fee7:15f7%vlan30 prefixlen 64 scopeid 0x16 
        ether 00:1b:21:05:02:66
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active
        vlan: 30 parent interface: em0

And tcpdump give me this but there is no configuration reflected as you see:
1199651104.651136 f2:56:04:43:00:3e > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: XXXX:XXX:XXX:30::1 > ff02::1: ICMP6, router advertisement, length 56
BTW this is not a general problem on the same box a other vlan interface works fine (without a bridge):
vlan251: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::213:8fff:fee7:15f7%vlan251 prefixlen 64 scopeid 0xe 
        inet 172.16.251.2 netmask 0xffffff00 broadcast 172.16.251.255
        inet 172.16.251.11 netmask 0xffffffff broadcast 172.16.251.11
        inet 172.16.251.10 netmask 0xffffffff broadcast 172.16.251.10
        inet6 2001:6f8:966:252:213:8fff:fee7:15f7 prefixlen 64 autoconf 
        ether 00:1b:21:05:02:66
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active
        vlan: 251 parent interface: em0
i have no real clue where to look in the kernel-source but if somebody has a idea why the packet looks like dropped, i will investigate by my self-:)

thanks in advance

meno



>How-To-Repeat:
setup a bridge and a ip6 rtadvd.
>Fix:
unknown

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