Chapter 18
  |  Address Table Commands
ā  518  ā
clear collision-mac-
address-table
This command removes all entries from the collision MAC address table.
Default Setting 
None
Command Mode 
Privileged Exec
Example 
Console#clear collision-mac-address-table
Console#
clear mac-address-
table dynamic
This command removes any learned entries from the forwarding database.
Default Setting 
None
Command Mode 
Privileged Exec
Command Usage
Even if a hash collision for a MAC address is resolved, entries in the collision MAC 
address table are not removed until this command is issued to reset the table, or 
the system is reset.
Example 
Console#clear mac-address-table dynamic
Console#
show collision-mac-
address-table
This command shows a list of MAC addresses that cannot be learned by the switch 
due to hash collisions.
Command Mode 
Privileged Exec
Example 
Console#show collision-mac-address-table
MAC Address        VLAN  Collision Count
----------------- ----- ----------------
90-e6-ba-cb-cd-d6     1                2
Total collision mac number: 1
Console#