All things related to multicast

[Peter John Hill <>]

On Nov 20, 2007, at 7:53 AM, Ramon Sierra wrote:

> Hi,
>
> I'm trying to setup a multicast in the following scenario:
>
> [RouterA] <---BGP Peering---> [RouterB] <---Static Routes--->  
> [RouterC]
>
> *All routers are Cisco

Do you have an RP? Probably should have more than one RP, using  
anycast. Pick an ip address from the range you are configuring /32s  
from..
ip pim rp-address x.x.x.x
on all your multicast routers.

For the anycast RP to work, just configure the same /32 on two routers  
and run msdp between them.

You should pretty much turn pim on every interface, don't by shy...

You will want to check your s,g and *,g state on your routers. On  
router C, when you look at that multicast group, does it see your  
source? Do you have any subscribers listening to that group somewhere  
else? Does your RP know about the source?

Check out this link for help:
http://www.cisco.com/warp/public/105/mcastguide0.html

If you need more help, feel free to include some of your config.

Peter

> I configured  ip multicast-routing, MBGP and MSDP sessions between A  
> and B, also "ip pim sparse-mode at interconnection interfaces.   
> Between router B and C, I configured "ip pim sparse-mode" at  
> interconnection interfaces", an MSDP peer was also setup.  After all  
> that, I'm not able to receive or send multicast to/from Router C.
>
> PD. Router A already has multicast
>
> Any info or configuration example will be really appreciate it,
>
> Ramón Sierra
> High Performance Computing facility
> University of Puerto Rico

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