Reference Guide

N8406-022A 1Gb Intelligent L2 Switch Browser-based Interface Reference Guide 21
Forwarding Database Information
To display the following form, select Layer 2 > FDB.
The forwarding database (FDB) contains information that maps the media access control (MAC) address of
each known device to the switch port where the device address was learned. The FDB also shows which other
ports have seen frames destined for a particular MAC address.
NOTE: The master forwarding database supports up to 8K MAC address entries on the MP per switch.
The following table describes the Forwarding Database Information controls:
Table 8 Forwarding Database Information controls
Control
Description
Show Entries of a Specific Source Port
Displays FDB entries for the selected port(s).
Show Entries of a Specific State
Displays FDB entries by state.
Show Entries of a Specific VLAN
Displays FDB entries for the selected VLAN.
Show Entry of a Specific MAC address
Displays a single FDB entry by IP address.
Enter the MAC address using the format, xx:xx:xx:xx:xx:xx.
For example, 08:00:20:12:34:56
Clear Dynamic MACs
Removes learned FDB entries.
Entry #
Displays the numeric identifier of the FDB entry.
MAC Address
Displays the MAC address of the FDB entry.
VLAN
Displays the VLAN number of the FDB entry.
Source Port
Displays the source port of the FDB entry.
Trunk
Displays the trunk number of the FDB entry, if applicable.
State
Displays the port state of the FDB entry.
Learned Port
Displays the port number of the port that received the FDB entry.
Permanent
Displays whether the FDB entry is a static, permanent entry.
An address that is in the forwarding (FORWARD) state means that the switch has learned it. When in the
trunking (TRUNK) state, the port field represents the trunk group number. If the state for the port is listed as
unknown (UNKNOWN), the MAC address has not yet been learned by the switch, but has only been seen as a
destination address. When an address is in the unknown state, no outbound port is indicated.