igmp problem

igmp problem

[felix-linuxkernel]

Hi!

I wrote a few multicast tools, which use these multicast groups:

  225.109.99.112
  ff02::6d63:7030
  224.110.99.112
  ff02::6e63:7030

I have a Cisco in the middle, and both boxes are in different VLANs.
The Cisco is sending out igmp queries.  The kernel never answers, even
after subscribing to these multicast groups.

The kernel version is 2.4.26.  What could be the problem here?

I found no netfilter rules, and the kernel has multicast support (at
least several igmp related sysctls exist).

Felix

Re: igmp problem

[Jesper Juhl]

On 9/5/05, felix-linuxkernel@fefe.de <felix-linuxkernel@fefe.de> wrote:
> Hi!
> 
> I wrote a few multicast tools, which use these multicast groups:
> 
>   225.109.99.112
>   ff02::6d63:7030
>   224.110.99.112
>   ff02::6e63:7030
> 
> I have a Cisco in the middle, and both boxes are in different VLANs.
> The Cisco is sending out igmp queries.  The kernel never answers, even
> after subscribing to these multicast groups.
> 
> The kernel version is 2.4.26.  What could be the problem here?
> 
> I found no netfilter rules, and the kernel has multicast support (at
> least several igmp related sysctls exist).
> 

I'm unfortunately not able to help you with your specific problem, but
a few words of advice: you really ought to start by reproducing the
problem with a recent kernel - like 2.4.31 or 2.6.13.
2.4.26 is really ancient and noone really cares about it any more.

You should probably also talk to the netdev people (CC'ed).

-- 
Jesper Juhl <jesper.juhl@gmail.com>
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