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15-10

Catalyst 3750-X and 3560-X Switch Software Configuration Guide

OL-21521-01

Chapter 15 Configuring VLANs

Configuring Extended-Range VLANs

Switch(config-if)# switchport mode access

Switch(config-if)# switchport acc

ess vlan 2

Switch(config-if)# end

Configuring Extended-Range VLANs

With VTP version 1 and version 2, when the switch is in VTP transparent mode (VTP disabled), you can

create extended-range VLANs (in the range 1006 to 4094). VTP version supports extended-range

VLANs in server or transparent move. 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.

With VTP version 1 or 2, extended-range VLAN configurations are not stored in the VLAN database,

ut 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. Extended-range VLANs created in VTP version 3 are stored

in the VLAN database.

Note Although the switch supports 4094 VLAN IDs, see the “Supported VLANs” section on page 15-2 for

the actual number of VLANs supported.

These sections contain extended-range VLAN configuration information:

• Default VLAN Configuration, page 15-10

• Extended-Range VLAN Configuration Guidelines, page 15-10

• Creating an Extended-Range VLAN, page 15-11

• Creating an Extended-Range VLAN with an Internal VLAN ID, page 15-13

Default VLAN Configuration

See Table 15-2 on page 15-7 for the default configuration for Ethernet VLANs. You can change only the

MTU size, private VLAN, and the 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:

• VLAN IDs in the extended range are not saved in the VLAN database and are not recognized by

VTP unless the switch is running VTP version 3.

• You cannot include extended-range VLANs in the pruning eligible range.

• In VTP version 1 and 2, a switch must be in VTP transparent mode when you create extended-range

VLANs. If VTP mode is server or client, an error message is generated, and the extended-range

VLAN is rejected. VTP version 3 supports extended VLANs in server and transparent modes.

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