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Catalyst 3750 Switch Software Configuration Guide
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Chapter 13 Configuring VLANs
Displaying VLANs
Displaying VLANs
Use the show vlan privileged EXEC command to display a list of all VLANs on the switch, including
extended-range VLANs. The display includes VLAN status, ports, and configuration information. To
view normal-range VLANs in the VLAN database (1 to 1005), use the show VLAN database
configuration command (accessed by entering the vlan database privileged EXEC command).
Table 13-3 lists the commands for monitoring VLANs.
For more details about the show command options and explanations of output fields, refer to the
command reference for this release.
Configuring VLAN Trunks
These sections describe how VLAN trunks function on the switch:
• Trunking Overview, page 13-17
• Encapsulation Types, page 13-18
• Default Layer 2 Ethernet Interface VLAN Configuration, page 13-19
• Configuring an Ethernet Interface as a Trunk Port, page 13-19
• Configuring Trunk Ports for Load Sharing, page 13-24
Step 11
end Return to privileged EXEC mode.
Step 12
copy running-config startup config Save your entries in the switch startup configuration file. To save an
extended-range VLAN configuration, you need to save the VTP
transparent mode configuration and the extended-range VLAN
configuration in the switch startup configuration file. Otherwise, if the
switch resets, it will default to VTP server mode, and the extended-range
VLAN IDs will not be saved.
Command Purpose
Table 13-3 VLAN Monitoring Commands
Command Command Mode Purpose
show VLAN database
configuration
Display status of VLANs in the VLAN database.
show current [vlan-id] VLAN database
configuration
Display status of all or the specified VLAN in the
VLAN database.
show interfaces [vlan
vlan-id]
Privileged EXEC Display characteristics for all interfaces or for
the specified VLAN configured on the switch.
show vlan [id vlan-id] Privileged EXEC Display parameters for all VLANs or the
specified VLAN on the switch.
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