Extended-Range Vlan Configuration Guidelines; Creating An Extended-Range Vlan - Cisco IE-3000-8TC Software Configuration Manual

Configuring Extended-Range VLANs

Extended-Range VLAN Configuration Guidelines

Follow these guidelines when creating extended-range VLANs:
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Creating an Extended-Range VLAN

You create an extended-range VLAN in global configuration mode by entering the vlan global
configuration command with a VLAN ID from 1006 to 4094. This command accesses the config-vlan
mode. The extended-range VLAN has the default Ethernet VLAN characteristics (see
the MTU size, and RSPAN configuration are the only parameters you can change. See the description of
the vlan global configuration command in the command reference for the default settings of all
parameters. If you enter an extended-range VLAN ID when the switch is not in VTP transparent mode,
an error message is generated when you exit from config-vlan mode, and the extended-range VLAN is
not created.
Extended-range VLANs are not saved in the VLAN database; they are saved in the switch running
configuration file. You can save the extended-range VLAN configuration in the switch startup
configuration file by using the copy running-config startup-config privileged EXEC command.
Beginning in privileged EXEC mode, follow these steps to create an extended-range VLAN:
Command
Step 1
configure terminal
Step 2
vtp mode transparent
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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).
VLAN IDs in the extended range are not saved in the VLAN database and are not recognized by
VTP.
You cannot include extended-range VLANs in the pruning eligible range.
The 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.
You can set the VTP mode to transparent in global configuration mode or in VLAN database
configuration mode. See the
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.
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 maximum number of
spanning-tree instances are on the switch, spanning tree is disabled on any newly created VLANs.
If the number of VLANs on the switch exceeds the maximum number of spanning-tree instances,
we recommend that you configure the IEEE 802.1s Multiple STP (MSTP) on your switch to map
multiple VLANs to a single spanning-tree instance. For more information about MSTP, see
Chapter 19, "Configuring MSTP."
Although the switch supports a total of 255 (normal-range and extended-range) VLANs, the number
of configured features affects the use of the switch hardware. If you try to create an extended-range
VLAN and there are not enough hardware resources available, an error message is generated, and
the extended-range VLAN is rejected.
Purpose
Enter global configuration mode.
Configure the switch for VTP transparent mode, disabling VTP.
"Disabling VTP (VTP Transparent Mode)" section on page
Chapter 15 Configuring VLANs
16-12. You
Table 15-2) and
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