Hi there, I'm new to the list!

Myself and a colleague have been trying to use Xorp 1.8.6 (we pulled the source from the git repo about a two months ago) to handle multicast routing over GRE tunnels for a rather convoluted scenario. In the course of trying to get that setup working (which will be another separate email to the list) we seem to be running into behavior from Xorp that is causing kernel panics to happen on FreeBSD 8.3-RELEASE.

Currently, we are able to startup Xorp normally with no apparent problems. However, as soon as we try to shutdown the Xorp service or initiate a system reboot the system will kernel panic. We are running Xorp on ALIX1.D single board computers. You can see more about the hardware specs here:

http://pcengines.ch/alix1d.htm

I have created a file dump of some of the kernel panics along with some kdbg backtraces for developers to take a look at (along with a kernel.debug for our kernel build). If I am reading the backtraces right, it looks like there might be an issue being caused by IGMP somehow. Perhaps a mismatch between v2 and v3?

http://www.mediafire.com/?ojxdc172mp7q6

I'm pretty new to Xorp and multicast so its possible I've missed something here. I've gone ahead and used send-pr to submit the error and you can find it here:

http://www.freebsd.org/cgi/query-pr.cgi?pr=175365

Output from fbsd for interfaces:

dispatch-dev# ifconfig -a
vr0: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=8280b<RXCSUM,TXCSUM,VLAN_MTU,WOL_UCAST,WOL_MAGIC,LINKSTATE>
        ether 00:0d:b9:0e:32:d4
        inet XX.XX.XXX.XX netmask 0xfffffffc broadcast XX.XX.XXX.XX
        inet 192.168.10.2 netmask 0xffffff00 broadcast 192.168.10.255
        inet 10.13.8.253 netmask 0xffffff80 broadcast 10.13.8.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=3<RXCSUM,TXCSUM>
        inet 127.0.0.1 netmask 0xff000000
enc0: flags=0<> metric 0 mtu 1536
pflog0: flags=0<> metric 0 mtu 33200
gre0: flags=9010<POINTOPOINT,LINK0,MULTICAST> metric 0 mtu 1476

If anyone has any input/insight as to what is causing the kernel panics and how to fix it, that would be great. Thanks!

--
Daniel Spisak
Network Engineer
Agiosat Government Services
dspi...@agiosat.net
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