DGS-3100 Series Gigabit Stackable Managed Switch CLI Manual
86
Example usa
ge:
To add multicast MAC forwarding:
DGS3100# config multicast_fdb default 01-00-5E-00-00-00 add 1
Success.
DGS3100#
config fdb aging_time
Purpose To set the aging time of the forwarding database.
Syntax
config fdb aging_time <value 10-630>
Description The config fdb aging_time command sets the aging time of the
forwarding database. 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 0 to 630 minutes with a default value of
5 minutes. 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table entries that are out-of-date or no longer exist.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.
Parameters <value 0-630> − The aging time for the MAC address forwarding
database value, in minutes.
Restrictions Only Administrator or operator-level users can issue this command.
Example usage:
To set the fdb aging time:
DGS3100# config fdb aging_time 300
Success.
DGS3100#
delete fdb
Purpose To delete an entry in the Switch’s forwarding database.
Syntax
delete fdb <vlan_name 32> <macaddr>
Description The delete fdb command deletes an entry in the Switch’s MAC
address forwarding database.
Parameters <vlan_name 32> − The name of the VLAN on which the MAC
address resides.
<macaddr> − The MAC address to be removed from the forwarding
table.
Restrictions Only Administrator or operator-level users can issue this command.
Example usage:
