Dell EMC SmartFabric OS10 User Guide Release 10.5.0

Egress mask

When multicast traffic from the source arrives at one of the VLT peer nodes, it is sent to the downstream receivers using local routing or switching and over the VLTi link. The port block at the VLTi link of the peer node drops the multicast traffic. This port block, also known as the egress mask, avoids duplicate traffic forwarding on the VLT port channel by both VLT nodes. However, if the receiver is connected to the peer node, the system forwards the multicast traffic to the receiver.