Below is the table providing details on how to assign a VLAN ID
| VLANs | Range | Usage | Propagated by VTP |
|---|---|---|---|
| 0, 4095 | Reserved | For system use only. You cannot see or use these VLANs. | N/A |
| 1 | Normal | Cisco default. You can use this VLAN but you cannot delete it. | Yes |
| 2-1001 | Normal | Used for Ethernet VLANs; you can create, use, and delete these VLANs. | Yes |
| 1002-1005 | Normal | Cisco defaults for FDDI and Token Ring. You cannot delete VLANs 1002-1005. | Yes |
| 1006-4094 | Extended | For Ethernet VLANs only. When configuring extended-range VLANs, note the following:• Layer 3 ports and some software features require internal VLANs. Internal VLANs are allocated from 1006 and up. You cannot use a VLAN that has been allocated for such use. To display the VLANs used internally, enter the show vlan internal usage command.•Switches running Catalyst product family software do not support configuration of VLANs 1006-1024. | No |
VLAN Parameters
- VLAN name
- VLAN type
- VLAN state (active or suspended)
Command Syntax to create VLAN:
Enters global configuration mode. Switch# configure terminal Adds an Ethernet VLAN. Switch(config)# vlan vlan_ID Switch(config-vlan)# Switch(config-vlan)# end Verifies the VLAN configuration Switch# show vlan [id | name] vlan_name
- Configuration example for the above commands:
Switch# configure terminal
Switch(config)# vlan 3
Switch(config-vlan)# end
Switch# show vlan id 3
VLAN Name Status Ports
—- ——————————– ——— ——————————-
3 VLAN0003 active
VLAN Type SAID MTU Parent RingNo BridgeNo Stp Trans1 Trans2
—- —– ———- —– —— —— ——– —- —— ——
3 enet 100003 1500 – – – – 0 0
Switch#
(All details are not shown in the above output)
- Configuring VLANs in VLAN Database Mode
When the switch is in VTP server or transparent mode, you can configure VLANs in the VLAN database mode. When you configure VLANs in VLAN database mode, the VLAN configuration is saved in the vlan.dat file, not the running-config or startup-config files. To display the VLAN configuration, enter the show running-config vlan command.
NOTE: Database mode supports the configuration of IDs from 1 to 1001, but not the extended addresses from 1006 to 4094.
Command Syntax to create VLAN in Database mode:
Enters VLAN database mode. Switch# vlan database
Adds an Ethernet VLAN.
Switch(vlan)# vlan vlan_ID Switch(vlan)# exit Verifies the VLAN configuration. Switch# show vlan [id | name] vlan_name
- Configuration example for the above commands:
Switch# vlan database
Switch(vlan)# vlan 3
VLAN 3 added:
Name: VLAN0003
Switch(vlan)# exit
APPLY completed.
Exiting….
Switch# show vlan name VLAN0003
VLAN Name Status Ports
---- -------------------------------- --------- ---------------------
3 VLAN0003 active
VLAN Type SAID MTU Parent RingNo BridgeNo Stp Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- ------ ------
3 enet 100003 1500 - - - - 0 0
Switch#