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Configuring MAC Table Aging
MAC table aging ensures that a switch tracks only active nodes on the network and that it is able to flush out network nodes that are no longer available.
To manage MAC entries more efficiently, you can configure an entry’s aging time, which is the maximum time that an entry can remain in the MAC address table before it is deleted because it has reached its maximum age.
You can use the set-mac-table-aging-time command to configure how long entries remain in the Ethernet switching table before expiring. Here the VLAN is employee-vlan:
[edit vlans employee-vlan]
user@switch# set mac-table-aging-time 200 