Cisco Catalyst 3120 Command Reference Guide

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Cisco Catalyst Blade Switch 3120 for HP Command Reference
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Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
mac address-table static drop
mac address-table static drop
Use the mac address-table static drop global configuration command on the switch stack or on a
standalone switch to enable unicast MAC address filtering and to configure the switch to drop traffic
with a specific source or destination MAC address. Use the no form of this command to return to the
default setting.
mac address-table static mac-addr vlan vlan-id drop
no mac address-table static mac-addr vlan vlan-id
Syntax Description
Defaults Unicast MAC address filtering is disabled. The switch does not drop traffic for specific source or
destination MAC addresses.
Command Modes Global configuration
Command History
Usage Guidelines Follow 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 the
first command.
For example, if you enter the mac address-table static mac-addr vlan vlan-id interface
interface-id global configuration command followed by the mac address-table static mac-addr
vlan vlan-id drop command, the switch drops packets with the specified MAC address as a source
or destination.
If you enter the mac address-table static mac-addr vlan vlan-id drop global configuration
command followed by the mac address-table static mac-addr vlan vlan-id interface interface-id
command, the switch adds the MAC address as a static address.
mac-addr Unicast source or destination MAC address. Packets with this MAC address are
dropped.
vlan vlan-id Specify the VLAN for which the packet with the specified MAC address is
received. Valid VLAN IDs are 1 to 4094.
Release Modification
12.2(40)EX This command was introduced.

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English