Configuring QoS Congestion Management
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 26-18
Multicast Source PFC on the OmniSwitch 6900
Ingress admission control on the OmniSwitch 6900 does not distinguish between unicast and multicast
traffic. Therefore, a multicast source connected to a port which is PFC aware will react to congestion
thereby pausing transmission. This will affect multicast hosts not in the congestion path.
When a multicast source is attached to a port on a OmniSwitch 6900, make sure that PFC is not enabled
for that particular priority on the ingress. This can be done by configuring the port to use DCP 8 (all
priorities are lossless) or for instance, DCP 1 (priority 4 and 5 are lossless, so multicast may be sent at any
other priority other than priority 4 or 5).
If multicast sources are configured to react to PFC, it will affect subscribers not in the congestion path.
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