29
Task Command
Display MAC address table
information.
display mac-address
[ mac-address [
vlan
vlan-id ] | [ [
dynamic
|
static
] [
interface
interface-type interface-number ] |
blackhole
|
multiport
] [
vlan
vlan-id ] [
count
] ]
Display the aging timer for dynamic
MAC address entries.
display mac-address aging-time
Display the system or interface MAC
address learning state.
display mac-address mac-learning
[
interface
interface-type
interface-number ]
Display MAC address statistics.
display mac-address statistics
Display the MAC address move
records.
display mac-address mac-move
[
slot
slot-number ]
Figure 6 An example for the display mac-address nickname command
MAC address table configuration example
Network requirements
Host A at MAC address 000f-e235-dc71 is connected to interface GigabitEthernet 1/0/1 of Device
and belongs to VLAN 1.
Host B at MAC address 000f-e235-abcd, which behaved suspiciously on the network, also belongs
to VLAN 1.
Configure the MAC address as follows:
• To prevent MAC address spoofing, add a static entry for Host A in the MAC address table of
Device.
• To drop all frames destined for Host B, add a blackhole MAC address entry for the host.
• Set the aging timer to 500 seconds for dynamic MAC address entries.
Configuration procedure
# Add a static MAC address entry for MAC address 000f-e235-dc71 on GigabitEthernet 1/0/1 that
belongs to VLAN 1.
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