display mac-address summary
Function
The display mac-address summary command displays statistics about all MAC address entries on a device.
Usage Guidelines
Usage Scenario
A MAC address table is an interface-based Layer 2 forwarding table. It stores information about MAC addresses learned by a device. A MAC address entry contains a MAC address, an interface on which a packet is forwarded to this MAC address, and a VLAN to which the specified interface belongs or a VSI to which the specified interface is bound. Before forwarding a packet, the device searches the MAC address table based on the destination MAC address of the packet and locate the outbound interface quickly. This facilitates packet forwarding and reduces broadcast traffic.
If a device learns a great number of MAC addresses of different types, run the display mac-address summary command to view statistics about the MAC address entries on the device.Precautions
If no static or static blackhole MAC address entries are configured on a device, statistics about the two types of MAC address entries are 0.
If MAC address learning is disabled on a device, statistics about dynamic MAC address entries are 0. You can run the undo mac-address learning disable command in the VLAN view to enable MAC address learning.Example
The actual command output varies according to the device. The command output here is only an example.
<HUAWEI> display mac-address summary -------------------------------------------------------- Slot Total Blackhole Static Dynamic -------------------------------------------------------- 1 4 1 3 0 --------------------------------------------------------
| Item | Description |
|---|---|
| Slot | Slot number of the board. |
| Total | Number of total MAC address entries. |
| Blackhole | Number of blackhole MAC address entries. |
| Static | Number of static MAC address entries. |
| Dynamic | Number of dynamic MAC address entries. |