Please explain how this would be possible:
1 sender
1 mcast group
1 receiver
which mode?
Philip Lavine wrote:
Please explain how this would be possible:
1 sender
1 mcast group
1 receiver
----------------
= no data loss1 sender
1 mcast group
2+ receivers on same VLAN and physical segment
--------------------
= data loss
Probably a crappy switch.
specifically, is your switch doing frame replication on ingress
or egress? 
adrian
More info if this helps:
Switch Platform:
4500 SUPII+
with gig line cards
Data rate is <100Mbps
Server OS: Windows 2003 R2 (please withhold snickering).
Philip Lavine wrote:
More info if this helps:
Switch Platform:
4500 SUPII+
with gig line cardsData rate is <100Mbps
Server OS: Windows 2003 R2 (please withhold snickering).
Multicast traffic is routed ?
Is the packet loss uniform for each receiver? Or is there a pattern to the loss, e.g. each receiver hears a different / non-overlapping 50% of the packets?
Off the cuff, I'd suspect a problem with IGMP snooping.
Cheers,
-Benson
Thank you Eric you are a genius, that has solved and issue that has plagued me for 3 years.
the problem was exactly as you said over subscription of the 8 ports tied to 1 ASIC
As an aside, the 6-port GigE card is not oversubscribed.
Mike