(usagi-users 03717) Re: Kernel ipv6 multicast forwarding

Hi,

Please ignore my previous message. We found the reason, it's because the
ttl of the multicast traffic was set to 1 and the router dropped the
packets because of this.

Jason 

-----Original Message-----
From: Zhao, Jason 
Sent: Thursday, September 14, 2006 12:34 PM
To: [email protected]
Subject: (usagi-users 03715) Kernel ipv6 multicast forwarding

Hi,

We have a strange problem of setting up ipv6 multicast on Linux. We are
running usagi-linux26-s20060522.tar.bz2 kernel. Using a simple test
problem
(http://www-r2.u-strasbg.fr/~hoerdt/dev/linux_ipv6_mforwarding/?topic=St
atus), we were able to statically setup kernel ipv6 multicast virtual
interface and cache. /proc/net/ip6_mr_vif/cache shows the correct
information. We also verified that
/proc/sys/net/ipv6/conf/ethx/mc_forwarding is 1. But when we sent UDP
multicast traffic, ip6_mr_vif/cache showed the traffic reached the box
from the incoming interface but didn't go out through the outgoing
interface. Any clue about what might be wrong, please let us know.


Thank you.

Jason 


==================================


::::::::::::::
ip6_mr_cache
::::::::::::::
Group                            Origin                           Iif
Pkts  Bytes     Wrong  Oifs
ff3e0000000000000000000000000101 22220015000000000000000000000001 0
119   172312        0  1:1
::::::::::::::
ip6_mr_vif
::::::::::::::
Interface      BytesIn  PktsIn  BytesOut PktsOut Flags
 0 eth0         172312     119         0       0 00000
 1 eth1              0       0         0       0 00000


Multicast traffic has source 2222:15::1 and destination ff3e::101.