When you enter the vlan vlan-id
command, a new VLAN is created with all default parameters and causes the CLI to enter VLAN configuration mode. If the vlan-id
argument that you entered matches an existing VLAN, nothing happens except that you enter VLAN configuration mode.
You can enter the vlan-range
using a comma (,), a dash (-), and the number.
VLAN 1 parameters are factory configured and cannot be changed; you cannot create or delete this VLAN. Additionally, you cannot create or delete VLAN 4095 or any of the internally allocated VLANs.
When you delete a VLAN, all the access ports in that VLAN are shut down and no traffic flows. On trunk ports, the traffic continues to flow for the other VLANs allowed on that port, but the packets for the deleted VLAN are dropped. However, the system retains all the VLAN-to-port mapping for that VLAN, and when you reenable,
that specified VLAN, the switch automatically reinstates all the original ports to that VLAN.
In Cisco NX-OS 5.0(2)N1(1), you can configure VLANs on a device configured as a VLAN Trunking Protocol (VTP) server or transparent device. If the VTP device is configured as a client, you cannot add a VLAN or enter the VLAN configuration mode.
This example shows how to add a new VLAN and enter VLAN configuration mode:
This example shows how to add a range of new VLANs and enter VLAN configuration mode:
This example shows how to delete a VLAN:
no vlan 2