Hewlett Packard Enterprise Development LP

Aruba Networks, Inc.

Vinod Arjun

Sheausong Yang

Sachin Ganu

Isaac Theogaraj

Jiwoong Lee

Suryanarayanan Devarajan

Kavitha Kamarthy

Examples described herein include a method and system for determining a number of controllers in a Network Authentication Server (NAS) controller cluster, wherein each of the controllers in the NAS controller cluster includes a unique Physical Internet Protocol (PIP) address; creating a number of unique Virtual Internet Protocol (VIP) addresses for use by an external authentication server (EAS) to communicate with the controllers in the NAS controller cluster, wherein the number of VIP addresses is to be proportional to the number of PIP addresses; and mapping each controller in the NAS controller cluster to a plurality of VIP addresses, wherein the VIP addresses are to have different priorities for different controllers in the NAS controller cluster.

Virtual address for controller in a controller cluster

The present disclosure discloses a method and a network device for failure detection of nodes in a cluster. Specifically, a network device transmits data to another device at a first time. The network device then receives an acknowledgment of the data from the second device at a second time. Next, the network device determines a Round Trip Time (RTT) for the first device and the second device based on the first time and the second time. Based on the RTT, the network device determines a first frequency for transmitting a heartbeat protocol message between the first device and the second device, and transmits a heartbeat protocol message between the first device and the second device at the first frequency.

Dynamic and adaptive approach for failure detection of node in a cluster

Example implementations relate to upgrading controllers and access points by group. A master controller may comprise a processing resource and a memory resource storing machine-readable instructions to cause the processing resource to create a plurality of groups of access points (APs) connected to a first and a second local controller, move a subset of the plurality of APs connected to the first local controller to the second local controller, upgrade the first local controller, move APs associated with a group of the plurality of APs to the first local controller, and upgrade the APs associated with the group of the first local controller.

Upgrade controllers and access points by group

Dynamic adaptive approach for failure detection of node in a cluster

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Bengaluru, India

Vinod Arjun