Cisco IOS LAN Switching Command Reference - mac address- group through revision . To remove a MAC ACL, use the no form of this command. This is a decimal number from 7. After a networking device receives a packet, the Cisco IOS software checks the source MAC address of the Gigabit Ethernet, 8.

Q VLAN, or 8. 02. Q- in- Q packet against the access list.

If the MAC access list permits the address, the software continues to process the packet. If the access list denies the address, the software discards the packet and returns an Internet Control Message Protocol (ICMP) host unreachable message. Note The mac access- groupcommand is supported on a VLAN subinterface only if a VLAN is already configured on the subinterface. To remove MAC ACLs, use the no form of this command. Once you enter the mac access- list extendedname command, use the following subset to create or delete entries in a MAC ACL: . The vlanvlan and cos value keywords and arguments are not supported on the MAC VLAN access control lists (VACLs). For the Cisco 7. 60.

ES2. 0 or ES4. 0 line cards are used, only the . If an extended MAC Access Control List is created using the . Table 1 describes the syntax of the mac access- list extended command.

Use 1 bit as a wildcard. For example, to match an address exactly, use 0. The first matching entry is used. To improve performance, place the most commonly used entries near the beginning of the access list. You cannot add entries to the middle of a list. To reset maximum aging time to the default setting, use the no form of this command.

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Valid values are 0, and from 5 to 1. Aging time is counted from the last time that the switch detected the MAC address. The default value is 3. Valid values are from 2 to 1. XTThis command was introduced on Cisco 2.

Cisco 3. 60. 0 series, and Cisco 3. T This command was integrated into Cisco IOS Release 1. T on Cisco 2. 60. Cisco 3. 60. 0 series, and Cisco 3.

T This command was integrated into Cisco IOS  Release 1. T. This keyword is supported only on a Supervisor Engine 7. Cisco 7. 60. 0 Internet routers and Catalyst 6. Valid entries are from 1. Dynamic addresses are automatically added to the address table and dropped from it when they are not in use. To remove dynamic entries from the MAC address table, use the no form of this command.

The ranges are based on type of Ethernet switch network module used: . The port is always 0 for an ATM interface. In this case, the VLAN assigned to the port is assumed to be that of the port associated with the MAC address. This keyword is required on trunk ports to specify to which VLAN the dynamic address is assigned.

Valid IDs are 1 to 1. In this case, the VLAN assigned to the port is assumed to be that of the port associated with the MAC address.

Note When this command is executed on a dynamic- access port, queries to the VLAN Membership Policy Server (VMPS) do not occur. The VMPS cannot verify that the address is allowed or determine to which VLAN the port should be assigned. This command should be used only for testing purposes. This keyword is required on trunk ports to specify to which VLAN the dynamic address is assigned. Valid IDs are 1 to 1. XTThis command was implemented on Cisco 2.

Cisco 3. 60. 0 series, and Cisco 3. T This command was integrated into Cisco IOS Release 1.

T, on Cisco 2. 60. Cisco 3. 60. 0 series, and Cisco 3. T This command was integrated into Cisco IOS  Release 1. T. Support in a specific 1. SX release of this train depends on your feature set, platform, and platform hardware. To disable learning, use the no form of this command. You cannot use the vlanvlan- id keyword and argument to configure learning on routed interfaces.

You cannot use the interface interfaceslot/port keyword and arguments to configure learning on switch- port interfaces or non- DFC modules. To disable MAC limiting, use the no form of this command. Command Modes Global configuration (config) Command History. Release. Modification. SXA Support for this command was introduced on the Supervisor Engine 7.

However, MAC limiting must first be enabled for the router (a higher level) in global configuration mode (config). How To Install Solar Blanket Pool Cover on this page. Both commands must be used to properly enable per- VLAN MAC limiting. Both commands must be used to properly enable per- interface MAC limiting. The first instance of the mac- address- table limit command enables MAC limiting.

The second instance of the command sets the limit and any optional actions to be imposed at the VLAN level. Router# enable. Router# configure terminal. Router(config)# mac- address- table limit. Router(config)# mac- address- table limit vlan 5.

Router(config)# end. This example shows how to enable per- interface MAC limiting.

The first instance of the mac- address- table limit command enables MAC limiting. The second instance of the command sets the limit and any optional actions to be imposed at the interface level. Router# enable. Router# configure terminal. Router(config)# mac- address- table limit. Router(config)# mac- address- table limit fastethernet. Router(config)# end. Related Commands.

Command. Description. Displays the information about the MAC- address table. To return to the default settings, use the no form of this command. Command Modes Global configuration (config) Command History. Release. Modification. SXH This command was introduced.

To disable MAC- move notification, use the no form of this command. Command Default MAC- move notification is not enabled. The maximum limit is 1.

MAC moves. To disable CAM table usage monitoring notification, use the no form of this command. Syntax Descriptionlimitpercentage Specifies the percentage of the CAM utilization; valid values are from 1 to 1. Command Modes Global configuration (config) Command History. Release. Modification. SXE Support for this command was introduced on the Supervisor Engine 7. To remove secure entries from the MAC address table, use the no form of this command. The ranges are based on type of Ethernet switch network module used: .

The port is always 0 for an ATM interface. Range is 1- 2. 00. In this case, the VLAN assigned to the port is assumed to be that of the port associated with the MAC address. This keyword is required for multi- VLAN and trunk ports. Valid IDs are 1 to 1. In this case, the VLAN assigned to the port is assumed to be that of the port associated with the MAC address. This keyword is required for multi- VLAN and trunk ports.

Valid IDs are 1 to 1. XTThis command was implemented on Cisco 2. Cisco 3. 60. 0 series, and Cisco 3. T This command was integrated into Cisco IOS Release 1. T, on Cisco 2. 60.

Cisco 3. 60. 0 series, and Cisco 3. T This command was integrated into Cisco IOS Release 1. T. Support in a specific 1. SX release of this train depends on your feature set, platform, and platform hardware. Therefore, if a secure address table entry for the specified MAC address and VLAN already exists on another port, it is removed from that port and assigned to the specified one. If the maximum number is less than the number of MAC addresses already specified statically, then an error message displays. Therefore, if a secure address table entry for the specified MAC address and VLAN already exists on another port, it is removed from that port and assigned to the specified one.

To remove entries profiled by the combination of specified entry information, use the no form of this command. The range is from 2 to 1.

The valid range is from 1. Note This option is valid only if Frame Relay encapsulation has been enabled on the specified interface. You must specify both a virtual path identifier (VPI) and a virtual circuit identifier (VCI), separated by a slash. Note This option is valid only for ATM interfaces. XTThis command was implemented on Cisco 2.

SX Support for this command was introduced on the Supervisor Engine 7. Support was added to High- Speed Serial Interface (HSSI), MLPP, and serial interfaces on Cisco 7.