DGS-1210/ME Metro Ethernet Switch CLI Reference Guide
185
To create a unicast MAC FDB entry:
DGS-1210-28MP/ME:5# create fdb default 00-00-00-00-01-02 port 2
Command: create fdb default 00-00-00-00-01-02 port 2
Success
DGS-1210-28MP/ME:5#
config fdb aging_time
Purpose
To set the aging time of the forwarding database.
Syntax
config fdb aging_time <sec 10-1000000>
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.
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that are out-of-date or no longer exist.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
<sec 10-1000000>
− The aging time for the MAC address
forwarding database value, in seconds.
Restrictions
Only Administrator or operator-level users can issue this command.
Example usage:
To set the fdb aging time:
DGS-1210-28MP/ME:5# config fdb aging_time 300
Command: config fdb aging_time 300
Success.
DGS-1210-28MP/ME:5#
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:
To delete a permanent FDB entry:
