[c-nsp] IOS XR needs PIM&MLD for clients to receive multicast stream

[Adam Vitkovsky]

Hi Mikael,

Sorry suffering from sleep deprivation today. I don't know what I was thinking right IPv6 = MLD.
So I guess it's the same as for IPv4 then. 
I don't understand it either why there's a choice to enable interface under IGMP/MLD separately from PIM when both are required anyways.
This should work as everyone would expect and Cisco should fix it.


adam
> -----Original Message-----
> From: Mikael Abrahamsson [mailto:swmike at swm.pp.se]
> Sent: 10 February 2015 14:15
> To: Adam Vitkovsky
> Cc: cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] IOS XR needs PIM&MLD for clients to receive multicast
> stream
> 
> On Tue, 10 Feb 2015, Adam Vitkovsky wrote:
> 
> > Hi Mikael,
> >
> > Have you enabled the CE facing interfaces under "router igmp" please? (oh
> and XR uses IGMPv3 by default).
> > - but can't recall if it worked at the end or the PIM was indeed necessary.
> 
> I am not using IGMP since this is IPv6 and I'm using MLD instead.
> 
> So I have now worked around this issue by letting XR enable PIM&MLD on all
> interfaces (using the "interface all" statement under
> "multicast-routing"), but implementing a PIM IPv6-wide neighbor-filter to
> only allow the router-to-router interfaces to form PIM neighborship, plus
> configuring "version" directly under "router mld".
> 
> This way it seems I get away from having interface-unique entries under
> router pim and router mld.
> 
> I still don't understand why the design choice to require PIM to be
> running on a client-interface, was made.
> 
> --
> Mikael Abrahamsson    email: swmike at swm.pp.se
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