Multicast stream freezes when new device is connected to LAN port

Unanswered Question
Jun 5th, 2010

Hello. I have IPTV network with IPTV multicast server, Catalyst 3750G Enhanced Image with IGMP snooping and queirer enabled, and SRW248G4 switches to connect clients. Clients are succesfully connecting to snooping groups (accordong to "show ip igmp snooping groups"), and also video is shown by client devices.

But following issue is observed: when client device is connected/disconnected from the SRW248g4 port or Catalyst 3750G port, video stream freezes on all devices over network. what can be the reason of this issue?

I have this problem too.
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dominic.caron Tue, 06/08/2010 - 13:23


This is a blind shot but...could it be something related to spanning-tree. If your edge port are not configure with portfast or equivalent, they generate TCN and the switch would start to flood the streams. It might be dropping packet when that happens.


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