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xStack DGS/DXS-3300 Series Layer 3 Stackable Gigabit Ethernet Switch CLI Manual
92
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 <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. The port is specified by listing
the switch number and the port number on that switch,
separated by a colon. For example, 1:3 specifies switch number
1, port 3. 2:4 specifies switch number 2, port 4.
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:
DGS-3324SRi:4#clear fdb all
Command: clear fdb all
Success.
DGS-3324SRi: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 is present in
the forwarding database table.
Restrictions None.
Example usage:
To display multicast MAC address table: