Configuring Extended-Range Vlans; Default Vlan Configuration - Cisco Catalyst 2950 Software Configuration Manual

Configuring Extended-Range VLANs

Switch# show interfaces fastethernet0/1 switchport
Name: Fa0/1
Switchport: Enabled
Administrative Mode: static access
Operational Mode: down
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 2 (VLAN0002)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Voice VLAN: none (Inactive)
Appliance trust: none
Configuring Extended-Range VLANs
When the switch is in VTP transparent mode (VTP disabled) and the enhanced software image is
installed), 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 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.
Although the switch supports 4094 VLAN IDs when the enhanced software image is installed, see the
Note
"Supported VLANs" section on page 13-2
This section includes this information about extended-range VLANs:
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Default VLAN Configuration

See
the MTU size on extended-range VLANs; all other characteristics must remain at the default state.
Catalyst 2950 Desktop Switch Software Configuration Guide
13-14
Default VLAN Configuration, page 13-14
Configuration Guidelines for Extended-Range VLANs, page 13-15
Creating an Extended-Range VLAN, page 13-15
Displaying VLANs, page 13-16
Table 13-3 on page 13-10
for the actual number of VLANs supported.
for the default configuration for Ethernet VLANs. You can change only
Chapter 13 Configuring VLANs
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