Allied Telesis AT-DC2552XS - Manual (Page 389)

AT-DC2552SX Switch Command Line Interface User’s Guide
Section II: Layer 2 Switching 389
This example disables the aging timer so that the switch does not delete
inactive dynamic entries of MAC addresses from the table:
awplus> enable
awplus# configure terminal
awplus(config)# mac address-table ageing-time 0
This example returns the aging timer to its default setting of 300 seconds:
awplus> enable
awplus# configure terminal
awplus(config)# no mac address-table ageing-time