Switch 7700 Configuration Guide

10 CHAPTER 11: SYSTEM MANAGEMENT
Set MAC Address Aging Time
Setting an appropriate aging time implements MAC address aging. Too long or
too short an aging time set by subscribers will cause the Ethernet switch to
broadcast a large amount of data packets without MAC addresses. This affects the
switch operation performance.
If aging time is set too long, the Ethernet switch stores a great number of
out-of-date MAC address tables. This consumes MAC address table resources and
the switch will not be able to update MAC address table according to the network
change.
If aging time is set too short, the Ethernet switch may delete valid MAC address
table.
You can use the following commands to set the MAC address aging time for the
system.
Perform the following configuration in system view.
In addition, this command takes effect on all the ports. However, the address
aging only functions on the dynamic addresses (the learned or configured as age
entries by the user).
By default, the aging-time is 300 seconds. With the no-aging parameter, the
command performs no aging on the MAC address entries.
Display and Debug MAC
Address Table
After the above configuration, execute display command in all views to display
the MAC address table configuration, and to verify the effect of the configuration.
Execute debugging command in user view to debug MAC address table
configuration.
Tab le 18 Set the MAC Address Aging Time for the System
Operation Command
Set the dynamic MAC address
aging time
mac-address timer { aging age | no-aging }
Restore the default MAC address
aging time
undo mac-address timer aging-time
Tab le 19 Display and Debug MAC Address Table
Operation Command
Display the information in the
address table
display mac-address [ static | dynamic ] [[ interface {
interface-name | interface-type interface-num } ] [ vlan
vlan-id ] ]
Display the aging time of dynamic
address table entries
display mac-address aging-time
Display the dynamic MAC address
learning capability of the system
and ports
display mac-address learning [ interface-type
interface-num | interface-name ]
Enable the address table
management debugging
debugging mac-address