27
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MAC address
move notifications and
optionally specify a
detection interval.
mac-address notification mac-move
[
interval interval-value
]
By default, MAC address move
notifications are disabled.
If you do not specify a detection
interval, the default setting of 1
minute is used.
After you execute this
command, the system sends
only log messages to the
information center module. If
the device is also configured
with the
snmp-agent trap
enable mac-address
command, the system also
sends SNMP notifications to the
SNMP module.
3.
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.
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
view:
interface bridge-aggregation
interface-number
N/A
6.
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.