34
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MAC address
move notifications.
mac-address notification mac-move
[
interval
interval-value
]
By default, MAC address move
notifications are disabled.
After you execute this command:
•
If the device is configured
with the
snmp-agent trap
enable mac-address
command, the system sends
SNMP notifications to the
SNMP module.
•
Otherwise, the system sends
log messages to the
information center module.
3.
(Optional.) Set a
threshold for MAC
address moves sourced
from an interface within a
detection interval.
mac-address notification mac-move
suppression
threshold
threshold-value
The default setting is 3.
4.
(Optional.) Set a MAC
address move
suppression interval.
mac-address notification mac-move
suppression
interval
interval-value
The default setting is 30
seconds.
5.
Enter interface view.
•
Enter Layer 2 Ethernet interface view:
interface
interface-type
interface-number
•
Enter Layer 2 aggregate interface:
interface bridge-aggregation
interface-number
N/A
6.
(Optional.) Enable MAC
address move
suppression.
mac-address notification mac-move
suppression
By default, MAC address move
suppression is disabled.
7.
Return to system view.
quit
N/A
8.
Enable ARP fast update
for MAC address moves.
mac-address mac-move fast-update
This task is required when you
enable MAC address move
suppression.
By default, ARP fast update for
MAC address moves is
disabled.
Enabling ARP fast update for MAC address moves
ARP fast update for MAC address moves allows the device to update an ARP entry immediately after the
outgoing interface for a MAC address changes. This feature ensures data connection without
interruption.
As shown in
, a mobile user Laptop accesses the network by connecting to AP 1 or AP 2. When
the AP to which the user connects changes, the switch updates the ARP entry for the user immediately
after it detects a MAC address move.