multicast issue

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Mar 25th, 2009
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We are trying whiteboard application that use multicast ¨Ip address¨

and it not working getting an error this error on the 2950 switch :

IGMPSN: router Received non igmp pak on vlanxxx

any idea ?


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CriscoSystems Wed, 03/25/2009 - 16:25
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What other devices are connecting on that VLAN to the switch?

Are those devices running the same IGMP version as your switch is, or are they running CGMP, or what?

tmesbah Thu, 03/26/2009 - 19:00
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The error is on Cisco2950 running IGMP conneted to the core switch Cat6509.

cat2950-cat6500-Hub1-WAN cloud-spoke

Using DMVPN v3 between Hu and spokes.

sh ip mroute on cat6500 show "stopped" for the multicast application

(*,, 00:29:14/stopped, RP, flags: DP

Incoming interface: Null, RPF nbr

Outgoing interface list: Null


Harold Ritter Fri, 03/27/2009 - 12:46
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Would it be possible to post the cat6500 config.


pkurdziel Wed, 03/25/2009 - 19:40
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I found this "receiver port can't belong to the

multicast vlan.



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