Configuring Mac Addresses; Configuring A Static Mac Address; Configuring The Aging Time For The Mac Table - Cisco Nexus 3000 series Configuration Manual

Configuring MAC Addresses

Configuring MAC Addresses

Configuring a Static MAC Address

You can configure MAC addresses for the switch. These addresses are static MAC addresses.
You can also configure a static MAC address in interface configuration mode or VLAN configuration
Note
mode.
SUMMARY STEPS
1. switch# configure terminal
2. switch(config-)# mac-address-table static mac_address vlan vlan-id {drop | interface {type slot/port}
| port-channel number} [auto-learn]
3. (Optional) switch(config-)# no mac-address-table static mac_address vlan vlan-id
DETAILED STEPS
Command or Action
Step 1 switch# configure terminal
Step 2 switch(config-)# mac-address-table static mac_address
vlan vlan-id {drop | interface {type slot/port} |
port-channel number} [auto-learn]
Step 3 switch(config-)# no mac-address-table static
mac_address vlan vlan-id
This example shows how to put a static entry in the MAC address table:
switch# configure terminal
switch(config)# mac-address-table static 12ab.47dd.ff89 vlan 3 interface ethernet 2/1
You can use the mac-address-table static command to assign a static MAC address to a virtual interface.

Configuring the Aging Time for the MAC Table

You can configure the amount of time that an entry (the packet source MAC address and port that packet
ingresses) remain in the MAC table. MAC aging time can be configured in either interface configuration mode
or in VLAN configuration mode.
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U1(1)
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Configuring the MAC Address Table
Purpose
Enters configuration mode.
Specifies a static address to add to the MAC address table.
If you enable the auto-learn option, the switch will update
the entry if the same MAC address is seen on a different
port.
(Optional)
Deletes the static entry from the MAC address table.