Creating An Extended-Range Vlan - Cisco Catalyst 3750 Software Configuration Manual

Configuring Extended-Range VLANs

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. Refer to the description
of the vlan global configuration command in the command reference for defaults 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.
Note Before you create an extended-range VLAN, you can verify that the VLAN ID is not used internally by
entering the show vlan internal usage privileged EXEC command. If the VLAN ID is used internally
and you want to free it up, go to
section on page 10-15
Beginning in privileged EXEC mode, follow these steps to create an extended-range VLAN:
Command
Step 1
configure terminal
Step 2 vtp mode transparent
Step 3
vlan vlan-id
Step 4
mtu mtu-size
Step 5
remote-span
Step 6
end
Step 7 show vlan id vlan-id
Step 8
copy running-config startup config
To delete an extended-range VLAN, use the no vlan vlan-id global configuration command.
The procedure for assigning static-access ports to an extended-range VLAN is the same as for
normal-range VLANs. See the
Catalyst 3750 Metro Switch Software Configuration Guide
10-14
the"Creating an Extended-Range VLAN with an Internal VLAN ID"
before creating the extended-range VLAN.
Purpose
Enter global configuration mode.
Configure the switch for VTP transparent mode, disabling VTP.
Enter an extended-range VLAN ID and enter config-vlan mode. The
range is 1006 to 4094.
(Optional) Modify the VLAN by changing the MTU size.
Note Although all VLAN commands appear in the CLI help in
config-vlan mode, only the mtu mtu-size and remote-span
commands are supported for extended-range VLANs.
(Optional) Configure the VLAN as the RSPAN VLAN. See the
"Configuring a VLAN as an RSPAN VLAN" section on page
Return to privileged EXEC mode.
Verify that the VLAN has been created.
Save your entries in the switch startup configuration file. To save
extended-range VLAN configurations, you need to save the VTP
transparent mode configuration and the extended-range VLAN
configuration in the switch startup configuration file. Otherwise, if the
switch resets, it will default to VTP server mode, and the extended-range
VLAN IDs will not be saved.
"Assigning Static-Access Ports to a VLAN" section on page
Chapter 10 Configuring VLANs
Table 10-2) and
21-17.
10-11.
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