Understanding Vlan Ranges - Cisco Nexus 5000 Series Configuration Manual

Understanding VLAN Ranges

The following figure shows VLANs as logical networks. In this diagram, the stations in the engineering
department are assigned to one VLAN, the stations in the marketing department are assigned to another VLAN,
and the stations in the accounting department are assigned to yet another VLAN.
Figure 2: VLANs as Logically Defined Networks
VLANs are usually associated with IP subnetworks. For example, all the end stations in a particular IP subnet
belong to the same VLAN. To communicate between VLANs, you must route the traffic.
By default, a newly created VLAN is operational. To disable the VLAN use the shutdown command.
Additionally, you can configure VLANs to be in the active state, which is passing traffic, or the suspended
state, in which the VLANs are not passing packets. By default, the VLANs are in the active state and pass
traffic.
The VLAN Trunking Protocol (VTP) mode is OFF. VTP BPDUs are dropped on all interfaces of a Cisco
Note
Nexus 5000 Series switch. This has the effect of partitioning VTP domains if other switches have VTP
turned on.
Understanding VLAN Ranges
The Cisco Nexus 5000 Series switch supports VLAN numbers 1to 4094 in accordance with the IEEE 802.1Q
standard. These VLANs are organized into ranges. The switch is physically limited in the number of VLANs
it can support. The hardware also shares this available range with its VSANs. For information about VLAN
and VSAN configuration limits, see the configuration limits documentation for your switch.
Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)N1(1)
44
Configuring VLANs