Specifications

DES-3000 Series Layer 2 Switch CLI Reference Manual
clear fdb
Purpose Used to clear the Switch’s forwarding database of all dynamically
learned MAC addresses.
Syntax
clear fdb [vlan <vlan_name 32> | port <port> | all]
Description This command is used to clear dynamically learned entries to the
Switch’s forwarding database.
Parameters
<vlan_name 32> − The name of the VLAN on which the MAC
address resides.
port <port> − The port number corresponding to the MAC destination
address. The Switch will always forward traffic to the specified
device through this port.
all − Clears all dynamic entries to the Switch’s forwarding database.
Restrictions Only administrator-level users can issue this command.
Example usage:
To clear all FDB dynamic entries:
DES-3026:4#clear fdb all
Command: clear fdb all
Success.
DES-3026:4#
show multicast_fdb
Purpose Used to display the contents of the Switch’s multicast forwarding
database.
Syntax
show mulitcast_fdb [vlan <vlan_name 32> | mac_address
<macaddr>
Description This command is used to display the current contents of the Switch’s
multicast MAC address forwarding database.
Parameters
vlan <vlan_name 32> − The name of the VLAN on which the MAC
address resides.
mac_address <macaddr> − The MAC address that will be added to
the forwarding table.
Restrictions None.
Example usage:
To display multicast MAC address table:
DES-3026:4#show multicast_fdb
Command: show multicast_fdb
VLAN Name : default
MAC Address : 01-00-5E-00-00-00
Egress Ports : 1-5,26
Mode : Static
Total Entries : 1
DES-3026:4#
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