H3C Technologies H3C S12500-X Series Switches - Manual (Page 42)

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Configuring MAC Information
The MAC Information feature can generate syslog messages or SNMP notifications when MAC address
entries are learned or deleted. You can use these messages to monitor users leaving or joining the
network and analyze network traffic.
The MAC Information feature buffers the MAC change syslog messages or SNMP notifications in a
queue. When the timer set for sending syslog messages or SNMP notifications does not expire, the
device overwrites the last piece of information written into the queue with the new MAC address change
if the queue has been exhausted. To send a syslog message or SNMP notification immediately after it is
created, set the queue length to zero.
The device writes information and sends messages only for the following MAC addresses: dynamic MAC
addresses, MAC addresses that pass MAC authentication, MAC addresses that pass 802.1X
authentication, and secure MAC addresses.
The device does not write information or send messages for blackhole MAC addresses, static MAC
addresses, multiport unicast MAC addresses, multicast MAC addresses, and local MAC addresses.
For more information about MAC authentication, 802.1X, and secure MAC addresses, see Security
Configuration Guide.
Configuration guidelines
Enable MAC Information globally before you enable it on interfaces.
Enabling MAC Information
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable MAC Information
globally.
mac-address information enable
By default, global MAC
Information is disabled.
3. Enter interface view.
• Enter Layer 2 Ethernet interface
view:
interface interface-type
interface-number
• Enter S-channel interface view:
interface s-channel
interface-number.channel-id
• Enter S-channel aggregate
interface view:
interface schannel-aggregation
interface-number:channel-id
N/A
4. Enable MAC Information on
the interface. mac-address information enable
{ added | deleted } By default, MAC Information is
disabled on an interface.