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xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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31-8 clear fdb
Description
This command is used to clear the switch’s forwarding database of all dynamically learned MAC
addresses.
Format
clear fdb [vlan <vlan_name 32> | port <port> | all ]
Parameters
vlan - Specify the name of the VLAN on which the MAC address resides.
<vlan_name 32> - The maximum length is 32 characters.
port - Specify the port number corresponding to the dynamically learned MAC address.
<port> - Specify the port number corresponding to the dynamically learned MAC address.
all - Specify to clear all VLANs and ports.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To clear all FDB dynamic entries:
DGS-3420-28SC:admin#clear fdb all
Command: clear fdb all
Success.
DGS-3420-28SC:admin#
31-9 show multicast_fdb
Description
This command is used to display the contents of the switch’s multicast forwarding database.
Format
show multicast_fdb {[vlan <vlan_name 32> | vlanid <vidlist>] | mac_address <macaddr>}
Parameters
vlan - (Optional) Specify the name of the VLAN on which the MAC address resides.
<vlan_name 32>
- The maximum length is 32 characters.
vlanid – (Optional) Specifies the VLAN ID on which the MAC address resides.
<vidlist> - Enter the VLAN ID used here.
mac_address - (Optional) Specify a MAC address, for which FDB entries will be displayed.
<macaddr> - Specify a MAC address, for which FDB entries will be displayed.