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show ha oversubscription statistics

show ha oversubscription statistics

Description

This command displays statistics for the HA extended managed device capacity feature

Syntax

No parameters.

Usage Guidelines

managed device acting as a standby managed device can oversubscribe to standby APs by up to four times that managed device's rated AP capacity, as long as the tunnels consumed the standby APs do not exceed the maximum tunnel capacity for that standby managed device.

Feature Requirements

All managed device using this feature must be deployed in a master-local topology where centralized licensing is enabled on the active and standby managed device. If centralized licensing is disabled, the standby AP oversubscription feature are disabled also. Standby managed device oversubscription and the HA 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 managed device oversubscription.

Standby managed device Capacity

The following table describes the AP oversubscription capacity maximum supported tunnels and for managed device that support this feature.

Controller Model Standby AP
Capacity
Maximum Tunnels Supported

7210

4x rated AP capacity 16384 tunnels
7220 4x rated AP capacity 32768 tunnels
7240 4x rated AP capacity 65536 tunnels

To determine the number of standby tunnels consumed by APs on each active managed device, multiply the number of APs on the active managed device by the number of BSSIDsBasic Service Set Identifier. The BSSID identifies a particular BSS within an area. In infrastructure BSS networks, the BSSID is the MAC address of the AP. In independent BSS or ad hoc networks, the BSSID is generated randomly. per AP. As an example, consider a deployment with four active 7210 managed device that each have 512 APs with 8 BSSIDsBasic Service Set Identifier. The BSSID identifies a particular BSS within an area. In infrastructure BSS networks, the BSSID is the MAC address of the AP. In independent BSS or ad hoc networks, the BSSID is generated randomly.. The APs on each active managed device consume (512 * 8) tunnels, for a combined total of 16,384 tunnels. A single 7210 managed device using the standby managed device oversubscription feature can act as the standby managed device for all four active managed device in this example, because this topology is within the 4x rated AP capacity limit and maximum tunnel limit for the a 7210 managed device model.

If the network administrator later changed all the APs in this deployment to support 10 BSSIDsBasic Service Set Identifier. The BSSID identifies a particular BSS within an area. In infrastructure BSS networks, the BSSID is the MAC address of the AP. In independent BSS or ad hoc networks, the BSSID is generated randomly., each active managed device would use (512 * 10) tunnels, for a combined total of 20,480 tunnels on the four active managed device. The tunnels required by the APs on the active managed device would then exceed the maximum tunnel limit for the standby managed device, so the standby managed device can no longer support all APs on the active managed device.

AP Failover

If a standby managed device reaches its AP oversubscription capacity or exceeds its maximum BSSIDBasic Service Set Identifier. The BSSID identifies a particular BSS within an area. In infrastructure BSS networks, the BSSID is the MAC address of the AP. In independent BSS or ad hoc networks, the BSSID is generated randomly. limit, the standby managed device drops any subsequent standby AP connections. A dropped AP attempts to reconnect to the standby managed device, but after it exceeds the maximum number of request retries, the AP informs the active managed device that it is unable to connect to the standby managed device. The active managed device then prompts the AP to create a standby tunnel to another standby managed device, if one is configured.

If an active managed device fails, the APs on the active managed device fail over to the standby managed device. Once the standby managed device has reached its capacity for active APs,it terminates tunnels to any standby APs that controller can no longer serve. When these APs detect that there is no longer a heartbeat between the AP and the standby managed device, they notify their active managed device that they can no longer connect to the standby. The active managed device then prompts the APs to establish standby tunnels to another standby managed device, if one is configured.

Examples

The following command displays oversubscription statistics for APs and tunnels

(host) [mynode] (config) #show ha oversubscription statistics

Platform oversubscription factor : 4

APs Limits

------------------

APs Number

---- ------

Platform Limit 512

Current Active 2

Current Standby 694

Active remaining 0

Standby remaining 1

Maximum allowed Standby 697

BSS Limits

--------------------

Tunnels Limits

------- ------

Maximum BSS tunnels 16384

Average BSS/AP 23

BSS tunnels in use 16360

BSS tunnels available 24

The output of this command includes the following parameters:

Parameter

Description

Platform limit

Maximum number of APs supported by the managed device platform.

Current Active

Number of active APs currently associated to the managed device.

Current Standby

Number of APs that are currently using the managed device as a standby managed device.

Active Remaining

Number of APs that can connect to this managed device in Active mode.

Standby Remaining

Number of APs that can connect to this managed device in Standby mode.

Maximum allowed Standby

Maximum number of Standby APs supported by the managed device.

Maximum BSS tunnels

The maximum number of BSSBasic Service Set. A BSS is a set of interconnected stations that can communicate with each other. BSS can be an independent BSS or infrastructure BSS. An independent BSS is an ad hoc network that does not include APs, whereas the infrastructure BSS consists of an AP and all its associated clients.  tunnels supported by the managed device.

Average BSS/AP

The average number of BSSBasic Service Set. A BSS is a set of interconnected stations that can communicate with each other. BSS can be an independent BSS or infrastructure BSS. An independent BSS is an ad hoc network that does not include APs, whereas the infrastructure BSS consists of an AP and all its associated clients. tunnels per AP using the managed device as a standby managed device.

BSS tunnels in use

Number of BSSBasic Service Set. A BSS is a set of interconnected stations that can communicate with each other. BSS can be an independent BSS or infrastructure BSS. An independent BSS is an ad hoc network that does not include APs, whereas the infrastructure BSS consists of an AP and all its associated clients.  tunnels currently in use by the managed device.

BSS tunnels available

Number of BSSBasic Service Set. A BSS is a set of interconnected stations that can communicate with each other. BSS can be an independent BSS or infrastructure BSS. An independent BSS is an ad hoc network that does not include APs, whereas the infrastructure BSS consists of an AP and all its associated clients. tunnels not currently in use by the managed device.

Related Commands

Command

Description

ha

This command configures the High Availability:Fast Failover feature by assigning a managed device or standby controller to a high-availability group, and defining the deployment role for each controller.

Command History

Release

Modification

ArubaOS 8.0.0.0

Command introduced.

Command Information

Platforms

License

Command Mode

All platforms

Base operating system.

Enable mode on Mobility Master.

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