bridge, ipv6 and rtadvd

[Spil Oss]

Hi All,

Don't know if this is expected behaviour.

My LAN (bge0) and WLAN (wlan0) are bridged in bridge0. I tried to run
rtadvd on bridge0 but that didn't result in ipv6 addresses on my
network. Tried running rtadvd directly /usr/sbin/rtadvd -c
/etc/rtadvd.conf -f -D and saw the requests coming in from the client
but that didn't result in a working ipv6 network. "Wild guessing" I
tried loading it with /usr/sbin/rtadvd -f -D bge0 and I had a
functional ipv6 network.....

Is this intended behaviour? Am I doing something wrong?

One of the other quirks I found was that the example rtadvd.conf line
from http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-ipv6.html
does not work, the :addrs#1: makes rtadvd report "<getconfig> bridge0
isn't defined in the configuration file or the configuration file
doesn't exist."

Kind regards,

Spil.
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[Stefan Bethke]

Am 06.02.2011 um 13:23 schrieb Spil Oss:

> Hi All,
>
> Don't know if this is expected behaviour.
>
> My LAN (bge0) and WLAN (wlan0) are bridged in bridge0. I tried to run
> rtadvd on bridge0 but that didn't result in ipv6 addresses on my
> network. Tried running rtadvd directly /usr/sbin/rtadvd -c
> /etc/rtadvd.conf -f -D and saw the requests coming in from the client
> but that didn't result in a working ipv6 network. "Wild guessing" I
> tried loading it with /usr/sbin/rtadvd -f -D bge0 and I had a
> functional ipv6 network.....
>
> Is this intended behaviour? Am I doing something wrong?

It appears to be intentional; there was some discussion a couple years back, and the current behavior is for virtual interfaces to not receive link-local addresses.

Since I prefer to have bridge0 as the "main" interface, I simply manually configured a link local address:

ipv6_enable="YES"
ipv6_gateway_enable="YES"
ipv6_network_interfaces="bridge0 gif0"
ipv6_ifconfig_bridge0="fe80::21c:c0ff:fe7d:8c50%bridge0"
ipv6_ifconfig_bridge0_alias0="2001:470:1f0b:XXXX::1 prefixlen 64"
ipv6_ifconfig_gif0="2001:470:1f0a:XXXX::2 2001:470:1f0a:XXXX::1 prefixlen 128"

$ cat /etc/rtadvd.conf
bridge0:\
:addrs#1:addr="2001:470:1f0b:XXXX::":raflags#64:

The IPv4 side of gif0 is brought up through a linkup script triggered by mpd when my DSL connection comes up; that also updates the endpoint address for the HE tunnel.

Oh, this is on -stable from Dec 4.

HTH,
Stefan

--
Stefan Bethke <s...@lassitu.de> Fon +49 151 14070811