PLANET GSW-4804SF - Manual (Page 70)

User’s Manual of GSW-4804SF
-70-
4.5.8 MAC Address Aging Time
This section provides MAC Address Aging Time Configuration and the screen in Figure 4-67 appears. Table 4-24 describes
the MAC Address Aging Time object of the Switch.
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 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dynamic forwarding table entries that are out-of-date or no longer exist.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 “Apply” button to save. The
valid range is 30-1000 seconds. Default is 300 seconds.
Figure 4-67 MAC Address Aging Time Web Screen
Table 4-24 Descriptions of the MAC Address Aging Time Web Screen Objects
O Object Description
MAC Address Aging Time
(30-1000 seconds)
Allow define the MAC Address Aging Time and the available range is 30 to 1000 seconds.
Default is “300” seconds .
Apply button Press this button to take affect.