Guidelines for Enabling or Disabling
The following guidelines apply to enabling and disabling egress flooding:
- Egress flooding can be disabled on ports
that are in a load-sharing group. In a load-sharing group, the ports in the group take on
the egress flooding state of the master port; each member port of the load-sharing group has
the same state as the master port.
- FDB learning
takes place on ingress ports and is independent of egress flooding; either can be enabled or
- Disabling unicast (or all) egress flooding
to a port also prevents the flooding of packets with unknown MAC addresses to that
- Disabling broadcast (or all) egress
flooding to a port also prevents the flooding of broadcast packets to that port.
- For SummitStack and ExtremeSwitching series switches, the following guidelines apply:
- You can enable or disable egress
flooding for unicast, multicast, or broadcast MAC addresses, as well as for all packets
on one or more ports.
- Disabling multicasting egress flooding
does not affect those packets within an IGMP membership
group at all; those packets are still forwarded out.
- If IGMP snooping is disabled, multicast
packets with static FDB entries are forwarded according to the FDB entry.