D-Link DGS-3120-48PC Reference Manual page 285

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xStack
name length is 32.
<macaddr> - The MAC address that will be added or deleted to the forwarding table.
add - Specify to add ports to the multicast forwarding table.
delete - Specify to remove ports from the multicast forwarding table.
<portlist> - Specify a range of ports to be configured. (UnitID: port number).
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To add a multicast MAC forwarding entry to the default VLAN on port 1:1 to 1:5:
DGS-3120-24TC:admin# config multicast_fdb default 01-00-5E-00-00-00 add 1:1-1:5
Command: config multicast_fdb default 01-00-5E-00-00-00 add 1:1-1:5
Success.
DGS-3120-24TC:admin#
30-5 config fdb aging_time
Description
This command is used to configure the MAC address table aging time.
Format
config fdb aging_time <sec 10-1000000>
Parameters
aging_time - Specify the FDB age out time in seconds. 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. The aging time can be from 10 to 1000000 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entries that are out-of-date or no longer exist.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 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..
<sec 10-1000000> - The FDB age out time must be between 10 to 1000000 seconds.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To configure the MAC address table aging time to 600 seconds:
DGS-3120 Series Managed Switch CLI Reference Guide
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