Allied Telesis AT-FS970M Series - Manual (Page 516)

Chapter 31: Multicast Commands
516
SWITCHPORT BLOCK EGRESS-MULTICAST
Syntax
switchport block egress-multicast
Parameters
None
Mode
Port Interface mode
Description
Use this command to block egress multicast packets on ports. By default,
all ports on the switch are set to allow multicast packets.
Note
This feature does not block multicast packets that have reserved
multicast addresses in the range of 01:80:C2:00:00:00 to
01:80:C2:00:00:0F.
Note
If IGMP snooping is disabled on the switch, all reports are
suppressed on a port even if you enable this command. By default,
IGMP snooping is disabled on the switch. For more information
about this feature, see Chapter 38, “Internet Group Management
Protocol (IGMP) Snooping” on page 577.
Confirmation Command
“SHOW INTERFACE” on page 229
Example
This example blocks egress multicast packets on ports 20 and 22:
awplus> enable
awplus# configure terminal
awplus(config)# interface port1.0.20,port1.0.22
awplus(config-if)# switchport block egress-multicast