Managing MAC Addresses

This chapter contains the following sections:

About MAC Addresses

The Media Access Control (MAC) address is a unique value that is associated with a network device. Layer 2 ports correlate the MAC address on a packet with the Layer 2 port information for that packet using the MAC address table. A MAC address table is built using the MAC source addresses of the frames received.

In Cisco UCS Director, MAC configuration is supported on the following Cisco network devices:

  • Cisco Nexus 1000 Series switches
  • Cisco Nexus 3000 Series switches
  • Cisco Nexus 5000, 5500, and 5672 Series switches
  • Cisco Nexus 6000 Series switches
  • Cisco Nexus 7000 Series switches
  • Cisco Nexus 9300 and 9500 Series switches

Note

For more detailed information about MAC addresses and configuration guidelines for MAC addresses, see the Cisco NX-OS Software Configuration Guides.

Adding a MAC Address to a Switch

Procedure

Step 1

Choose Physical > Network.

Step 2

On the Network page, choose the pod.

Step 3

Select the network device that needs to be configured.

Step 4

Click MAC Address Table.

Step 5

Click Create MAC Address.

Step 6

In the MAC Address Parameters screen, complete the following fields:

Name Description

MAC Address field

The MAC address that is added to the switch MAC address table.

VLAN ID Select button

In the Select dialog box, choose the VLAN ID number associated with this MAC address.

Select Port Select button

In the Select dialog box, choose the LAN port (channel) for this VLAN ID number.

Copy Running configuration to Startup configuration check box

Check this check box to copy the running configuration to the startup configuration.

Step 7

Click Submit.

Removing a MAC Address from a Switch

Procedure

Step 1

Choose Physical > Network.

Step 2

On the Network page, choose the pod.

Step 3

Select the network device for which you need to delete the MAC address.

Step 4

Click MAC Address Table.

Step 5

Choose the MAC address to be deleted.

Step 6

Click Delete.

Step 7

In the MAC Address Parameters screen, complete the following fields:

Name Description

MAC Address button

The MAC address on the switch that you selected for deletion.

VLAN ID field

The VLAN ID number associated with the MAC address.

Copy Running configuration to Startup configuration check box

Check this check box to copy the running configuration to the startup configuration.

Step 8

Click Submit.

Assigning MAC Address to a Port

Procedure

Step 1

Choose Physical > Network.

Step 2

On the Network page, choose the pod.

Step 3

Select the network device to be configured.

Step 4

Click MAC Address Table.

Step 5

Choose a MAC address to be assigned to a port.

Step 6

Click Assign MAC Address Port.

Step 7

In the MAC Address Parameters screen, complete the following fields:

Name Description

MAC Address field

The MAC address to be assigned to a port.

Select Port button

Click Select. In the Select dialog box, choose the LAN port (channel).

Copy Running configuration to Startup configuration check box

Check this check box to copy the running configuration to the startup configuration.

Step 8

Click Submit.

Unassigning MAC Address from a Port

Procedure

Step 1

Choose Physical > Network.

Step 2

On the Network page, choose the pod.

Step 3

Select the network device to be configured.

Step 4

Click MAC Address Table.

Step 5

Click Unassign MAC Address Port.

Step 6

In the MAC Address Parameters screen, complete the following fields:

Name Description

Select Port button

Click Select. In the Select dialog box, choose the LAN port (channel).

Copy Running configuration to Startup configuration check box

Check this check box to copy the running configuration to the startup configuration.

Step 7

Click Submit.

Configuring the Aging Time for the MAC Address Table

You can configure the amount of time that an entry (the packet source MAC address and port that packet ingresses) remains in the MAC address table.

Procedure

Step 1

Choose Physical > Network.

Step 2

On the Network page, choose the pod.

Step 3

Select the network device to be configured.

Step 4

Click MAC Address Table Configuration.

Step 5

Click Configure MAC Address Table.

Step 6

In the MAC Address Parameters screen, complete the following fields:

Name Description

Age Time field

The time from 120 to 918,000 seconds before an entry ages out and is discarded from the MAC address table. The number 0 disables MAC aging. You can use multiples of 5. The default is 300 seconds. If a VLAN is not specified, the aging specification applies to all VLANs.

Copy Running configuration to Startup configuration check box

Check the check box to copy the running configuration to the startup configuration.

Step 7

Click Submit.