All things related to multicast

[Stig Venaas <>]

Bill Owens wrote:
[...]
> That's right; all the major desktop and server OSes do MLDv1, only Linux does 
> MLDv2. Windows Vista will have v2 when it is released (whenever that is - I 
> don't keep track). OSX should get it once FreeBSD has it, but there are IPR 
> issues that ironically relate to an Apple patent. The last I'd heard, folks 
> had concluded that the IPR claim would not apply to a host implementation, 
> only (possibly) for a router, and they were stripping out just the host parts 
> of the code to include in FreeBSD. But I haven't heard of any progress in a 
> couple of months. BTW, that's why FreeBSD and OSX don't have IGMPv3 either.
>
> Oh, and Juniper's MLDv2 implementation (router, not snooper) is incompatible 
> with the way the Linux implementation works. Not usually an issue since few 
> folks have hosts directly connected to Juniper ports, but it bit us once.

My understanding is that this is purely a Juniper issue. It appears that 
Juniper has only implemented include mode for MLDv2, hence SSM only.

Stig

> Bill.