mac

Commands for Network Port Configuration
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specified port; mcast: prevents that unknown multicast packets can not be transmitted to
the specified port; ucast: prevents that unknown unicast packets can not be transmitted
to the specified port.
Command Mode: Port configuration mode.
Default: Switch transmits broadcast, unknown multicast and unknown unicast packets to
other port in broadcast domain.
Usage Guide: This command takes effect for 100M and 1000M ports; it is also takes
effect for Access, Trunk and Hybrid ports. When this command is valid, the port will allow
unicast or multicast flow to pass after port learned the corresponding unicast mac or
multicast mac.
This command only control that broadcast, multicast and unknown unicast packets
sent by other ports cannot be transmitted to the specified port, but it cannot control these
packets from the specified port. For example, set switchport flood-control bcast
command in port 1/1, broadcast packets cannot be transmitted from other ports to port
1/1, but port 1/1 can receive and transmit broadcast packets.
Example: Configure flood-control of bcast and mcast for port 1/1 or port 1/8-10
respectively.
Switch(config)#interface ethernet 1/1
Switch(config-if-ethernet1/1)#switchport flood-control bcast
Switch(config)#interface ethernet 1/8-10
Switch(config-if-port-range)#switchport flood-control mcast