ipv6 autoconfiguration doesn't work anymore

[Laurent Bigonville]

Binary package hint: linux-image-2.6.20-5-lowlatency

ipv6 autoconfiguration doesn't work anymore with linux-image-2.6.20-5-lowlatency (2.6.20-5.7).

Works perfectly with linux-image-2.6.20-4-lowlatency (2.6.20-4.6)

[Ben Collins (ben-collins)]

What about with 2.6.20-5-generic?

[Laurent Bigonville (bigon)]

Yep same problem with 2.6.20-5-generic

[Ben Collins (ben-collins)]

Please attach via the web interface (do not paste into comments) the output of "lsmod" and "dmesg", in separate, uncompressed files.

Thanks

[Ben Collins (ben-collins)]

Well, ipv6 is loaded and there doesn't appear to be any problems with it related to the kernel. The ipv6 automatic setup was normally done via scripts. This behavior may have changed on purpose, or because of a bug in userspace.

I'm not sure what package(s) affect this, so retarget to this package once you find out.

[Fabio Massimo Di Nitto (fabbione)]

ipv6 autoconf is done at kernel level. Userspace is not involved. I will try to setup a test environment here and let you know. At the moment i am out of vlans for this test.

Fabio

[Fabio Massimo Di Nitto (fabbione)]

What RA software are you using on the router? It will be intersting to have as many details of the setup as possible so that we can reproduce the case.

FAbio

[Laurent Bigonville (bigon)]

I'm using radvd (1.0-1) from debian etch

I just have a look with wireshark and I see router advertisements being sent

[Mark Schouten (mark-prevented)]

As can be seen in the duplicate bug, #80279, advertisements are being sent.

root@highway:/proc/sys/net/ipv6# tcpdump -i eth1 -vvv -s 512 ip6
tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 512 bytes
18:34:36.919252 IP6 (hlim 255, next-header: ICMPv6 (58), length: 56) fe80::201:80ff:fe5f:9b4a > ip6-allnodes: [icmp6 sum ok] ICMP6, router advertisement, length 56
        hop limit 64, Flags [none], pref medium, router lifetime 1800s, reachable time 0s, retrans time 0s
          source link-address option (1), length 8 (1): 00:07:e9:0f:d3:aa
            0x0000: 0007 e90f d3aa
          prefix info option (3), length 32 (4): 2001:7b8:3:1000::/64, Flags [onlink, auto], valid time 2592000s, pref. time 604800s
            0x0000: 40c0 0027 8d00 0009 3a80 0000 0000 2001
            0x0010: 07b8 0003 1000 0000 0000 0000 0000

Also, not IPv6 is broken. Only the processing of RA.

[Mark Schouten (mark-prevented)]

This bug is very annoying for people actively using IPv6. Although IPv6 is not really mainstream (yet), it would help if the development part of the community would supply sufficient means to let it become mainstream.

Please let users know what more info you need to get this fixed. I will try to supply you with information.

[Martijn vdS (martijn)]

I have the same problem here, on 2.6.20-5-generic on i386.

[Mark Schouten (mark-prevented)]

There seems to be a fix:
http://lkml.org/lkml/2007/1/17/163 .

Patch can be found here:
http://www.spinics.net/lists/netdev/msg22663.html

Please implement this ASAP.

[Mark Schouten (mark-prevented)]

This bug is confirmed multiple times. A solution seems to be at hand.

[Laurent Bigonville (bigon)]

Fixed in linux-image-2.6.20-6

Could someone confirm?

[Mark Schouten (mark-prevented)]

pingmark@sandra:~$ ping6 -c1 highway.office.bit.nl
PING highway.office.bit.nl(highway.office.bit.nl) 56 data bytes
64 bytes from highway.office.bit.nl: icmp_seq=1 ttl=61 time=11.8 ms

--- highway.office.bit.nl ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 11.803/11.803/11.803/0.000 ms

marks@highway:~$ uname -a
Linux highway.office.bit.nl 2.6.20-6-generic #2 SMP Tue Jan 30 21:55:16 UTC 2007 i686 GNU/Linux
marks@highway:~$ ip -6 addr list
1: lo: <LOOPBACK,UP,10000> mtu 16436
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qlen 1000
    inet6 2001:7b8:3:1000:202:b3ff:fe10:dbda/64 scope global dynamic
       valid_lft 2591855sec preferred_lft 604655sec
    inet6 fe80::202:b3ff:fe10:dbda/64 scope link
       valid_lft forever preferred_lft forever

Works like a charme!

[Laurent Bigonville (bigon)]

Fixed