HP Cisco Nexus 5000 Cisco Nexus 5000 Series Switch CLI Software Configuration - Page 116

Information About VLANs Chapter 6 Configuring VLANs Send feedback to [email protected] Figure 6-1 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 6-1 VLANs as Logically Defined Networks Switch1 187539 Switch2 VLAN2 Server A Server B CServer C VLAN3 Server D Server E D ServEer F F VLAN4 Server G Server H G H J Server J 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; that is, the VLAN is in the no shutdown condition. 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. 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. You use each range slightly differently. The switch is physically limited in the number of VLANs it can support. The hardware also shares this available range with its VSANs. For details of the number of supported VLANs and VSANs, see the "Configuration Limits" section on page 51-1. Cisco Nexus 5000 Series Switch CLI Software Configuration Guide 6-2 OL-16597-01