Delete Fdb - Allied Telesis AT-9724TS Reference Manual

config fdb aging_time
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To set the fdb aging time:

delete fdb

Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To delete a permanent FDB entry:
Example usage:
To delete a multicast fdb entry:
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch • Command Line Interface Reference Manual
Used to set the aging time of the forwarding database.
config fdb aging_time <sec 10-1000000>
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seconds.A very long aging time can result in dynamic forwarding table entries that are out-of-date or no longer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 aging time for the MAC address forwarding database value.The value in seconds may
be between 10 and 1000000 seconds.The default is 300 seconds.
<macaddr> – The MAC address that will be added to the multicast forwarding table.
Only administrator-level users can issue this command.
AT-9724TS:4# config fdb aging_time 300
Command: config fdb aging_time 300
S u c c e s s .
A T - 9 7 2 4 T S : 4 #
Used to delete an entry to the Switch's forwarding database.
delete fdb <vlan_name 32> <macaddr>
This command is used to delete a previous entry to the Switch's MAC address forwarding database.
<vlan_name 32> – The name of the VLAN on which the MAC address resides.
<macaddr> – The MAC address that will be deleted from the forwarding table.
Only administrator-level users can issue this command.
AT-9724TS:4# delete fdb default 00-00-00-00-01-02
Command: delete fdb default 00-00-00-00-01-02
S u c c e s s .
A T - 9 7 2 4 T S : 4 #
AT-9724TS:4# delete fdb default 01-00-00-00-01-02
Command: delete fdb default 01-00-00-00-01-02
S u c c e s s .
A T - 9 7 2 4 T S : 4 #
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