H3C Technologies H3C S10500 Series Switches - Manual (Page 40)

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MAC Information configuration
Overview
Introduction to MAC Information
To monitor a network, you must monitor users who are joining and leaving the network. Because a MAC
address uniquely identifies a network user, you can monitor users who are joining and leaving a network
by monitoring their MAC addresses.
With the MAC Information function, Layer 2 Ethernet ports send Syslog or trap messages to the monitor
end in the network when they obtain or delete MAC addresses. By analyzing these messages, the
monitor end can monitor users who are accessing the network.
How MAC Information works
When a new MAC address is obtained or an existing MAC address is deleted on a device, the device
writes related information about the MAC address to the buffer area used to store user information.
When the timer set for sending MAC address monitoring Syslog or trap messages expires, or when the
buffer reaches capacity, the device sends the Syslog or trap messages to the monitor end.
Configuring MAC Information
Enabling MAC Information globally
Follow these steps to enable MAC Information globally:
To do… Use the command… Remarks
Enter system view system-view —
Enable MAC Information globally mac-address information enable
Required
Disabled by default.
Enabling MAC Information on an interface
Follow these steps to enable MAC Information on an interface:
To do… Use the command… Remarks
Enter system view system-view —
Enter Layer 2 Ethernet interface
view interface interface-type
interface-number
—
Enable MAC Information on the
interface mac-address information enable
{ added | deleted } Required
Disabled by default.