Catalyst 3750-E and 3560-E Switch Cisco IOS ... - DNIP . NET

Chapter 2Catalyst 3750-E and 3560-E Switch Cisco IOS Commandsmac address-table static dropmac address-table static dropUse the mac address-table static drop global configuration command on the switch stack or on astandalone switch to enable unicast MAC address filtering and to configure the switch to drop trafficwith a specific source or destination MAC address. Use the no form of this command to return to thedefault setting.mac address-table static mac-addr vlan vlan-id dropno mac address-table static mac-addr vlan vlan-idSyntax Descriptionmac-addrvlan vlan-idUnicast source or destination MAC address. Packets with this MAC address aredropped.Specify the VLAN for which the packet with the specified MAC address isreceived. Valid VLAN IDs are 1 to 4094.DefaultsUnicast MAC address filtering is disabled. The switch does not drop traffic for specific source ordestination MAC addresses.Command ModesGlobal configurationCommand HistoryRelease12.2(35)SE2ModificationThis command was introduced.Usage GuidelinesFollow these guidelines when using this feature:• Multicast MAC addresses, broadcast MAC addresses, and router MAC addresses are not supported.Packets that are forwarded to the CPU are also not supported.• If you add a unicast MAC address as a static address and configure unicast MAC address filtering,the switch either adds the MAC address as a static address or drops packets with that MAC address,depending on which command was entered last. The second command that you entered overrides thefirst command.For example, if you enter the mac address-table static mac-addr vlan vlan-id interfaceinterface-id global configuration command followed by the mac address-table static mac-addrvlan vlan-id drop command, the switch drops packets with the specified MAC address as a sourceor destination.If you enter the mac address-table static mac-addr vlan vlan-id drop global configurationcommand followed by the mac address-table static mac-addr vlan vlan-id interface interface-idcommand, the switch adds the MAC address as a static address.OL-9776-08Catalyst 3750-E and 3560-E Switch Command Reference2-343