[c-nsp] Nexus 7K - Multicast Question

[Antonio Soares]

This is lab environment, I'm just testing basic multicast features with
nexus.

The command reference says the following:

"When you enter this command, the traffic generated is handled by the device
CPU, not the hardware."

http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/multicast/c
ommand/reference/mcr_cmds_i.html#wp1230243

The "ip igmp static-group" was replaced by the command:

ip igmp static-oif

http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/multicast/c
ommand/reference/mcr_cmds_i.html#wp1034808

When I have the igmp joing on the physical interface, the (*,G) entry is
created then it disappears. But I see the (*,G) entry on the RP and I
verified that the traffic is actually sent to the nexus.


Thanks.

Regards,

Antonio Soares, CCIE #18473 (R&S/SP)
amsoares at netcabo.pt
http://www.ccie18473.net


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Phil Mayers
Sent: sábado, 1 de Outubro de 2011 10:49
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Nexus 7K - Multicast Question

On 10/01/2011 01:31 AM, Antonio Soares wrote:
> Hello group,
>
> Anyone knows why the "ip igmp join-group" does not work on a physical
> interface but it works fine on a loopback interface ?

"ip igmp join-group" is a CPU command; it makes the CPU join the group 
and receive the packets. I imagine this might not work on a hardware 
platform, with an interface which will be processed in hardware.

Are you sure you don't want "ip igmp static-group"?

What's your use case?
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