Dell W-Series 304 Instant 6.5.1.0-4.3.1.0 CLI Reference Guide - Page 1512

show ha oversubscription statistics show ha oversubscription statistics Description This command displays statistics for the High Availability extended controller capacity feature Syntax No parameters. Usage Guidelines Starting with ArubaOS 6.4.0.0, a controller acting as a standby controller can oversubscribe to standby APs by up to four times that controller's rated AP capacity, as long as the tunnels consumed the standby APs do not exceed the maximum tunnel capacity for that standby controller. Feature Requirements All controllers using this feature must be deployed in a master-local topology where centralized licensing is enabled on the active and standby controllers. If centralized licensing is disabled, the standby AP oversubscription feature are disabled also. Standby controller oversubscription and the high availability state synchronization features are mutually incompatible cannot be be enabled simultaneously. If your deployment uses the state synchronization feature, you must disable it before you enable standby controller oversubscription. Standby Controller Capacity The following table describes the AP oversubscription capacity maximum supported tunnels and for controllers that support this feature. Controller Model W-7210 W-7220 W-7240 Standby AP Capacity 4x rated AP capacity 4x rated AP capacity 4x rated AP capacity Maximum Tunnels Supported 16384 tunnels 32768 tunnels 65536 tunnels To determine the number of standby tunnels consumed by APs on each active controller, multiply the number of APs on the active controllers by the number of BSSIDs per AP. As an example, consider a deployment with four active W-7210 controllers that each have 512 APs with 8 BSSIDs. The APs on each active controller consume (512 * 8) tunnels, for a combined total of 16,384 tunnels. A single W-7210 controller using the standby controller oversubscription feature can act as the standby controller for all four active controllers in this example, because this topology is within the 4x rated AP capacity limit and maximum tunnel limit for the a W-7210 controller model. If the network administrator later changed all the APs in this deployment to support 10 BSSIDs, each active controller would use (512 * 10) tunnels, for a combined total of 20,480 tunnels on the four active controllers. The tunnels required by the APs on the active controllers would then exceed the maximum tunnel limit for the standby controller, so the standby controller can no longer support all APs on the active controllers. Dell Networking W-Series ArubaOS 6.5.x | Reference Guide show ha oversubscription statistics | 1512