Specifications

11-12
Catalyst 2970 Switch Software Configuration Guide
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Chapter 11 Configuring VLANs
Configuring Extended-Range VLANs
To return an interface to its default configuration, use the default interface interface-id interface
configuration command.
This example shows how to configure Gigabit Ethernet interface 0/1 as an access port in VLAN 2:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 2
Switch(config-if)# end
Configuring Extended-Range VLANs
When the switch is in VTP transparent mode (VTP disabled), you can create extended-range VLANs (in
the range 1006 to 4094). Extended-range VLANs enable service providers to extend their infrastructure
to a greater number of customers. The extended-range VLAN IDs are allowed for any switchport
commands that allow VLAN IDs. You always use config-vlan mode (accessed by entering the vlan
vlan-id global configuration command) to configure extended-range VLANs. The extended range is not
supported in VLAN database configuration mode (accessed by entering the vlan database privileged
EXEC command).
Extended-range VLAN configurations are not stored in the VLAN database, but because VTP mode is
transparent, they are stored in the switch running configuration file, and you can save the configuration
in the startup configuration file by using the copy running-config startup-config privileged EXEC
command.
Note Although the switch supports 4094 VLAN IDs, see the “Supported VLANs” section on page 11-3 for
the actual number of VLANs supported.
This section includes this information about extended-range VLANs:
• Default VLAN Configuration, page 11-12
• Extended-Range VLAN Configuration Guidelines, page 11-12
• Creating an Extended-Range VLAN, page 11-13
Default VLAN Configuration
See Table 11-2 on page 11-8 for the default configuration for Ethernet VLANs. You can change only
the MTU size and remote SPAN configuration state on extended-range VLANs; all other characteristics
must remain at the default state.
Extended-Range VLAN Configuration Guidelines
Follow these guidelines when creating extended-range VLANs:
• To add an extended-range VLAN, you must use the vlan vlan-id global configuration command and
access config-vlan mode. You cannot add extended-range VLANs in VLAN database configuration
mode (accessed by entering the vlan database privileged EXEC command).