Viewing VLAN forwarding database information

Use this procedure to display the MAC addresses that are learned or statically configured for a VLAN. In order to learn you have to be connected to another switch or host and receive some traffic.

Note

Note

The VSP 4450 Series does not display a log message when MAC learning maximum limit is reached.

Procedure

  1. To enter User EXEC mode, log on to the switch.
  2. View VLAN forwarding database information:

    show vlan mac-address-entry [<1-4059>]

Example

View VLAN forwarding database information:

Switch:1> show vlan mac-address-entry

================================================================================
                                    Vlan Fdb
================================================================================
VLAN            MAC                           SMLT
ID   STATUS     ADDRESS            INTERFACE  REMOTE TUNNEL
--------------------------------------------------------------------------------
1    learned    f8:15:47:e1:80:0c  Port-1/2   false  -
2    learned    32:20:d3:81:00:77  Port-1/9   false  -
4    learned    b4:a9:5a:2b:78:31  Port-2/1   false  -

3 out of 3 entries in all fdb(s) displayed.

View where entries are learned. The TUNNEL column indicates where in the SPBM network an entry is learned.

Switch:1> show vlan mac-address-entry spbm-tunnel-as-mac

================================================================================
                                    Vlan Fdb
================================================================================
VLAN            MAC                           SMLT
ID   STATUS     ADDRESS            INTERFACE  REMOTE TUNNEL
--------------------------------------------------------------------------------
1    learned    f8:15:47:e1:80:0c  Port-1/2   false  -
2    learned    32:20:d3:81:00:77  Port-1/9   false  -
4    learned    b4:a9:5a:2b:78:31  Port-2/1   false  -

3 out of 3 entries in all fdb(s) displayed.

Variable Definitions

Use the data in the following table to use optional parameters with the show vlan mac-address-entry command.

Variable

Value

<1-4059>

Specifies the VLAN ID in the range of 1 to 4059. By default, VLAN IDs 1 to 4059 are configurable and the system reserves VLAN IDs 4060 to 4094 for internal use. On switches that support the vrf-scaling and spbm-config-mode boot configuration flags, if you enable these flags, the system also reserves VLAN IDs 3500 to 3998. VLAN ID 1 is the default VLAN and you cannot create or delete VLAN ID 1.

mac <0x00:0x00:0x00:0x00:0x00:0x00>

Specifies the MAC address.

port {slot/port[-slot/port][,...]}

Specifies the port or port list.

spbm-tunnel-as-mac

Displays where entries are learned. The TUNNEL column indicates where in the SPBM network an entry is learned.