Cisco Catalyst 2960 Command Reference Manual page 93

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Catalyst 2960 Switch Cisco IOS Commands

Usage Guidelines

You enter MAC-access list configuration mode by using the

configuration command.

If you use the host keyword, you cannot enter an address mask; if you do not use the host keyword, you

must enter an address mask.

When an access control entry (ACE) is added to an access control list, an implied deny-any-any

condition exists at the end of the list. That is, if there are no matches, the packets are denied. However,

before the first ACE is added, the list permits all packets.

For more information about named MAC extended access lists, see the software configuration guide for

this release.

This example shows how to define the named MAC extended access list to deny NETBIOS traffic from

any source to MAC address 00c0.00a0.03fa. Traffic matching this list is denied.

Switch(config-ext-macl)# deny any host 00c0.00a0.03fa netbios.

This example shows how to remove the deny condition from the named MAC extended access list:

Switch(config-ext-macl)# no deny any 00c0.00a0.03fa 0000.0000.0000 netbios.

This example denies all packets with Ethertype 0x4321:

Switch(config-ext-macl)# deny any any 0x4321 0

You can verify your settings by entering the show access-lists privileged EXEC command.

Related Commands

mac access-list extended

permit (MAC access-list

configuration)

show access-lists

mac access-list extended

Creates an access list based on MAC addresses for non-IP traffic.

Permits non-IP traffic to be forwarded if conditions are matched.

Displays access control lists configured on a switch.

Catalyst 2960 Switch Command Reference

deny (MAC access-list configuration)