Cisco Systems IE3010 Configuring Extended-Range VLANs

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Cisco IE 3010 Switch Software Configuration Guide

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Chapter 14 Configuring VLANs

Configuring Extended-Range VLANs

Configuring Extended-Range VLANs

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

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

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,

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. Extended-range VLANs created in VTP version 3 are stor ed

in the VLAN database.

Note Although the switch supports 4094 VLAN IDs, see the “Supported VLANs” section on page 14-2 for

the actual number of VLANs supported.

These sections contain extended-range VLAN configuration information:

• Default VLAN Configuration, page 14-10

• Extended-Range VLAN Configuration Guidelines, page 14-10

• Creating an Extended-Range VLAN, page 14-11

• Creating an Extended-Range VLAN with an Internal VLAN ID, page 14-12

See Table 14-2 on page 14-7 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.

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.

• For VTP version 1 or 2, you can set the VTP mode to transparent in global configuration mode. See

the “Configuring VTP Mode” section on page 15-10. You should save this configuration to the

startup configuration so that the switch boots up in VTP transparent mode. Otherwise, you lose the

extended-range VLAN configuration if the switch resets. If you create extended-range VLANs in

VTP version 3, you cannot convert to VTP version 1 or 2.

• STP is enabled by default on extended-range VLANs, but you can disable it by using the no

spanning-tree vlan vlan-id global configuration command. When the ma ximum number of

spanning-tree instances are on the switch, spanning tree is disabled on any newly created VLANs.