display mac-address mac-move
Use display mac-address mac-move to display the MAC address move records after the device is started.
Syntax
In standalone mode:
display mac-address mac-move [ slot slot-number ]
In IRF mode:
display mac-address mac-move [ chassis chassis-number slot slot-number ]
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator
Parameters
slot slot-number: Specifies a card by its slot number. If you do not specify a card, the command displays MAC address move records for all cards. (In standalone mode.)
chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, the command displays MAC address move records for all cards. (In IRF mode.)
Usage guidelines
When a MAC address frequently moves between the specified two interfaces, Layer 2 loops might occur in the network. To discover and locate loops, you can view the MAC address move records.
In the MAC address move records, records with the same MAC address, VLAN, source port, and current port are considered to be one record.
(In standalone mode.) A card can generate a maximum of 200 MAC address move records.
(In IRF mode.) Each card of an IRF member device can generate a maximum of 200 MAC move records.
Examples
# Display the MAC address move records for a slot.
<Sysname> display mac-address mac-move slot 1 MAC address VLAN Current port Source port Last time Times 0000-0001-002c 1 XGE1/0/1 XGE1/0/2 2013-05-20 13:40:52 1 0000-0001-002c 1 XGE1/0/2 XGE1/0/1 2013-05-20 13:41:30 1 --- 2 MAC address moving records found ---
# Display the MAC address move records for all slots.
<Sysname> display mac-address mac-move MAC address VLAN Current port Source port Last time Times 0000-0001-002c 1 XGE1/0/1 XGE1/0/2 2013-05-20 13:40:52 20 0000-0001-002c 1 XGE1/0/2 XGE1/0/1 2013-05-20 13:41:32 20 0000-0094-0001 1 XGE1/0/3 XGE1/0/4 2013-05-20 13:42:22 13 0000-0094-0001 1 XGE1/0/4 XGE1/0/3 2013-05-20 13:42:21 12 --- 4 MAC address moving records found ---
Table 3: Command output
Field | Description |
|---|---|
VLAN | VLAN to which the outgoing interface of the MAC address entry belongs. |
Current port | Interface to which the MAC address was moved. |
Source port | Interface from which the MAC address was moved. |
Last time | Last time when the MAC address was moved. |
Times | Number of MAC address moves after the device is started. For a MAC address record, the number of MAC address moves is increased by 1 when a new MAC address move has the same MAC address, VLAN, Current Port, and Source Port fields as the MAC address record. |
Related commands
mac-address notification mac-move