Extreme Networks ExtremeWare XOS Command Reference Manual page 644

FDB Commands
The following guidelines apply to enabling and disabling egress flooding:
Disabling multicasting egress flooding does not affect those packets within an IGMP membership
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group at all; those packets are still forwarded out. If IGMP snooping is disabled, multicast packets
are not flooded.
Egress flooding can be disabled on ports that are in a load-sharing group. If that is the situation, the
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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 is independent of egress flooding; either can be enabled or disabled independently.
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Disabling unicast (or all) egress flooding to a port also stops packets with unknown MAC addresses
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to be flooded to that port.
Disabling broadcast (or all) egress flooding to a port also stops broadcast packets to be flooded to
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that port.
BlackDiamond 8800 family of switches and Summit X450 switch only. You can disable egress flooding for
unicast, multicast, or broadcast MAC addresses, as well as for all packets on the ports of the
BlackDiamond 8800 family of switches or the Summit X450 switch.
BlackDiamond 10K switch only. You must disable egress flooding on all packets on the specified port or
ports. You cannot specify broadcast, unicast, or multicast packets; the egress flooding command applies
to all packets.
NOTE
When you disable egress flooding on the BlackDiamond 10K switch, you also turn off broadcasting.
Example
The following command disables egress flooding on slot 4, ports 5 and 6 on a BlackDiamond 10K
switch:
disable flooding all_cast port 4:5-4:6
The following command disables unicast flooding on ports 10-12 on a Summit X450 switch:
disable flooding unicast port 10-27
History
This command was first available in ExtremeWare XOS 11.2.
Platform Availability
This command is available on all platforms.
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ExtremeWare XOS 11.3 Command Reference