FDB Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
798
NOTE
Disabling egress flooding with static MAC addresses can affect many protocols, such as IP and ARP among others.
The following guidelines apply to enabling and disabling egress flooding:
●
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
are not flooded.
●
Egress flooding can be disabled on ports that are in a load-sharing group. If that is the situation, 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 is independent of egress flooding. FDB learning and egress flooding can be enabled or
disabled independently.
●
Disabling unicast or all egress flooding to a port also stops packets with unknown MAC addresses to
be flooded
to
that port.
●
Disabling broadcast or all egress flooding to a port also stops broadcast packets to be flooded
to
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. The default behavior for the
BlackDiamond 8800 family of switches and the Summit X450 is enabled egress flooding for all packet
types.
BlackDiamond 10808 and 12804 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. The default behavior for the BlackDiamond 10K and 12804 switch is
enabled egress flooding.
NOTE
When you disable egress flooding on the BlackDiamond 10808 and 12804 switch, you also turn off broadcasting.
Example
The following command disables egress flooding on slot 4, ports 5 and 6 on a BlackDiamond 10808
switch:
disable flooding all_cast port 4:5-4:6
The following command disables unicast flooding on ports 10-12 on a Summit X450 series switch:
disable flooding unicast port 10-27
History
This command was first available in ExtremeWare XOS 11.2.
