4.7.5 MAC Address Aging Time
The Aging Time affects the learning process of the Switch. Dynamic forwarding table entries, which are made up
of the source and destination MAC addresses and their associated port numbers, are deleted from the table if they
are not accessed within the aging time.
The aging time can be from 30 to 1,000,000 seconds with a default value of 300 seconds. A very long aging time
can result in dynamic forwarding table entries that are out-of-date or no longer exist. This may cause incorrect
packet forward indecisions by the Switch.
If the Aging Time is too short however, many entries may be aged out too soon. This will result in a high
percentage of received packets whose source addresses cannot be found in the forwarding table, in which case
the switch will broadcast the packet to all ports, negating many of the benefits of having a switch.
Static forwarding entries are not affected by the aging time.
To set the Aging Time, enter the number in the
MAC Address Aging Time
field, and click on the
“OK”
button to
save. The valid range is 30~1000 seconds. Default is 300 seconds.
