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To enable MAC address migration log notifying:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable MAC address
migration log notifying.
mac-flapping notification
enable
By default, MAC address migration log
notifying is disabled.
The MAC address migration logs of the last one minute are displayed once every one minute.
Displaying and maintaining MAC address tables
Task Command
Remarks
Display MAC address table
information.
display mac-address
[
mac
-
address
[
vlan
vlan-id
] | [ [
dynamic
|
static
] [
interface
interface-type interface-number
] |
blackhole
]
[
vlan
vlan-id
] [
count
] ] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the aging timer for
dynamic MAC address
entries.
display mac-address aging-time
[
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display the system or
interface MAC address
learning state.
display mac-address mac-learning
[
interface
-
type interface
-
number
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
Display MAC address
statistics.
display mac-address statistics
[
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any view
MAC address table configuration example
Network requirements
As shown in
:
•
The MAC address of Host A is 000f-e235-dc71 and belongs to VLAN 1. It is connected to
Ethernet 1/0/1 of the device. To prevent MAC address spoofing, add a static entry for the host in
the MAC address table of the device.
•
The MAC address of Host B is 000f-e235-abcd and belongs to VLAN 1. For security, because
this host once behaved suspiciously on the network, add a blackhole MAC address entry for the
host MAC address, so all packets destined for the host are dropped.
•
Set the aging timer for dynamic MAC address entries to 500 seconds.
