Extreme 9920 software replicates network traffic to multiple ports and port-channels.
Extreme 9920 software achieves replication using egress groups. Replication Service is responsible for forwarding the packets to more than one egress ports. Replication ensures that each monitoring tool has access to necessary packets. The egress groups contain more than one egress object during replication. A route-map or ingress policy always points to an egress group and this ensures that moving between unicast and multicast cases does not require any route-map object changes. The egress-group associated with the route-map can be modified to add or remove egress objects.
Extreme 9920 software uses replication block in the hardware to generate copies for each member. Each copy derives a unique internal identifier which is bound to its own egress-policy (listener-policy) and tunnel-encap properties. If the destination is LAG, load balancing is done based on the system LAG hash properties.
Extreme 9920 software supports the following replication functionality:
For information about replication scale limitations, see Extreme 9920 Software Scale and Standards Matrix, 21.1.1.0 .