RE: Verifying SSM

Please remind me if y'all know....i vaguely remember, something like
this....

Ip igmp join-group

ip igmp static-group

One of them DROVE THE CPU UP LIKE CRAZY HIGH, when I was testing with a
couple hundred mbps of mcast traffic.....but the other one didn't. do you
remember which causes CPU hit (perhaps its process switched based on
something or the other)....sorry, I'm reaching for details that I don't
recall, I just remember the Cisco tac telling me that there are different
uses for each and don't recall the details...

Thanks
Aaron

4506(config-if)#ip igmp static-group ?
  * Populated for all groups
  A.B.C.D IP group address

4506(config-if)#ip igmp static-group 239.1.1.1 ?
  source SSM source address
  <cr>

4506(config-if)#ip igmp static-group 239.1.1.1 source ?
  A.B.C.D IP source address
  ssm-map Get source via SSM mapping

4506(config-if)#ip igmp join-group ?
  A.B.C.D IP group address

4506(config-if)#ip igmp join-group 239.1.1.1 ?
  <cr>

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of John
Neiberger
Sent: Wednesday, March 09, 2011 11:59 AM
To: Rich Collins
Cc: ccielab_at_groupstudy.com
Subject: Re: Verifying SSM

On Wed, Mar 9, 2011 at 10:31 AM, Rich Collins <nilsi2002_at_gmail.com> wrote:
> Hi,
>
> While looking at the vrf-lite multicast thread I revisited SSM.
>
> How does one about testing SSM? I suppose you need to generate an
> igmpv3 join but the ping to the multicast group is normally igmpv2...
> Is there a method with "ip sla"?
>
> Thanks
> Rich

You can configure igmpv3 on an interface and then do a static join
with either igmp join-group or igmp static-group. Since it's SSM,
you'll need to remember to include the source IP in that command. Then
just ping the group from the source and you should get a reply. If
everything is working, you'll see the S,G mroutes all along the path.

I don't know about the ip sla piece.

John

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Received on Wed Mar 09 2011 - 14:28:39 ART