H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 126)

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Displaying and maintaining MAC address tables
To do… Use the 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 ] ]
Available in any view
Display the aging timer for
dynamic MAC address entries display mac-address aging-time
Available in any view
MAC address table configuration example
Network requirements
As shown in Figure 36 :
• The MAC address of Host A is 000f-e235-dc71 and belongs to VLAN 1. It is connected to
GigabitEthernet 0/2 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 destination blackhole MAC address entry for
the host MAC address, so that all packets destined for the host will be dropped.
• Set the aging timer for dynamic MAC address entries to 500 seconds.
Figure 36 Network diagram for MAC address table configuration
Configuration procedure
# Add a static MAC address entry.
system-view
[SecBlade] mac-address static 000f-e235-dc71 interface gigabitethernet 0/2 vlan 1
# Add a destination blackhole MAC address entry.
[SecBlade] mac-address blackhole 000f-e235-abcd vlan 1
# Set the aging timer for dynamic MAC address entries to 500 seconds.
[SecBlade] mac-address timer aging 500