Information Commands
32
Table 18 Layer 2 information commands
Command Usage
show vlan information
Displays VLAN configuration information, including:
• VLAN Number
• VLAN Name
• Status
• Port membership of the VLAN
Command mode: All
show layer2
Dumps all switch information available from Layer 2 memory
(10K or more, depending on your configuration).
If you want to capture dump data to a file, set your
communication software on your workstation to capture session
data prior to issuing the dump commands.
Command mode: All
FDB information commands
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
management processor (MP) per switch.
Table 19 FDB information commands
Command Usage
show mac-address-table address
<mac-address>
Displays a single database entry by its MAC address. You are
prompted to enter the MAC address of the device.
Enter the MAC address using the format:
xx:xx:xx:xx:xx:xx. (For example:
08:00:20:12:34:56)
You can also enter the MAC address using the format:
xxxxxxxxxxxx. (For example: 080020123456)
Command mode: All
show mac-address-table port <port
number>
Displays all FDB entries for a particular port.
Command mode: All
show mac-address-table vlan <1-4095>
Displays all FDB entries on a single VLAN. The range is
1-4095.
Command mode: All
show mac-address-table state
{flood|forward|ifmac|ignore|trunk|
unknown}
Displays all FDB entries that match a particular state.
Command mode: All
show mac-address-table
Displays all entries in the Forwarding Database.
Command mode: All
