Extreme Networks 300-48 Multicast issues

Archived from groups: comp.dcom.lans.ethernet (More info?)

Hi,

Anyone got any experience with running MC over multiple VLANs on the
300-48, or any Summit box, for that matter?

I am running a MC source in VLAN A, with multiple clients in other
VLANs on the same pyhsical 300-48. The application is live TV. I have
IGMP snooping, IPMCForwarding and PIM turned on with default settings.
Joining and leaving the MC groups is not an issue, but once a client
has joined the performance of the stream is not great - I get data loss
resulting in picture blocking and glitching every few seconds on all
the clients. It looks like a straightforward network performance issue,
apart from all the ports are running comfortably below 50% utilisation
with no errors, which points me at a specific MC or layer 3 (for the
MCforwarding) problem...

More info supplied on request - meanwhile any ideas gratefully recieved
:-)

Thanks,

Ade