Limit of Multicast Sources on a 2960 / 3560

Unanswered Question
Jan 4th, 2008

Hello group, I have seen a problem with a 2960 and 3560 where after having more than 18 multicast senders results in severe loss of video frames. Each source is 1.5Mb/s.

When using the same setup with a 3750 I can have more than 40 senders without any issue. Is there some limitation in the number of source/senders on a 2960 and 3560? If so where is this documented?

The switches have pretty much been left at default as far as multicast goes, (IGMP Snooping etc)

I have tried CGMP instead but the result is the same, anything over 18 senders causes all of the feeds to be useless.



I have this problem too.
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romainpage Fri, 01/11/2008 - 01:31


Did you find anything for your issue as I am facing what you are seeing too : with more than 20 senders, multicast is not working anymore for additonnal streams ?

The links provided previously do not give any details regarding this.

Best regards,



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