D-Link DGS-1510/ME Series Reference Manual page 237

DGS-1510/ME Series Metro Ethernet Switch CLI Reference Guide
<macaddr> - Enter the MAC address that will be added or deleted to the forwarding table.
add - Specifies to add ports to the multicast forwarding table.
delete - Specifies to remove ports from the multicast forwarding table.
<portlist> - Enter a range of ports to be configured.
Restrictions
Only Administrators, Operators and Power-Users can issue this command.
Example
To add a multicast MAC forwarding entry to the default VLAN on port 1 to 5:
DGS-1510-28XMP/ME:admin# config multicast_fdb default 01-00-5E-00-00-00 add 1-5
Command: config multicast_fdb default 01-00-5E-00-00-00 add 1-5
Success.
DGS-1510-28XMP/ME:admin#
28-5 config fdb aging_time
Description
This command is used to configure the MAC address table aging time. The aging time affects the learning process
of the Switch. Dynamic forwarding table entries, which are made up of the source MAC addresses and their
associated port numbers, are deleted from the table if they are not accessed within the aging time. 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aging time can result in dynamic forwarding table entries that are out-of-date or no longer exist.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 forwarding decisions 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.
Format
config fdb aging_time <sec 10-1000000>
Parameters
<sec 10-1000000> - Enter the FDB age out time between 10 to 1000000 seconds. The default value is 300
seconds.
Restrictions
Only Administrators, Operators and Power-Users can issue this command.
Example
To configure the MAC address table aging time to 600 seconds:
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