Alcatel-Lucent IAP93 Podręcznik Użytkownika Pobierz pdf (Strona 82)

AOS-W Instant 6.3.1.1-4.0 | User Guide Virtual Controller Configuration | 82

Chapter 8

Virtual Controller Configuration

This chapter provides the following information:

l Virtual Controller Overview

l Virtual Controller IP Address Configuration

Virtual Controller Overview

AOS-W Instant does not require an external to regulate and manage the Wi-Fi network. Instead, one OAW-IAP in

every network assumes the role of Virtual Controller. It coordinates, stores, and distributes the settings required to

provide a centralized functionality to regulate and manage the Wi-Fi network. The Virtual Controller is the single point

of configuration and firmware management. When configured, the Virtual Controller sets up and manages the VPN

tunnel to a in the data center.

The Virtual Controller also functions like any other AP with full RF scalability. It also acts as a node, coordinating

DHCP address allocation for network address translated clients ensuring mobility of the clients when they roam

between different OAW-IAPs.

Master Election Protocol

The Master Election Protocol enables the AOS-W Instant network to dynamically elect an OAW-IAP to take on a

Virtual Controller role and allow graceful failover to a new Virtual Controller when the existing Virtual Controller is not

available. This protocol ensures stability of the network during initial startup or when the Virtual Controller goes down

by allowing only one OAW-IAP to self-elect as a Virtual Controller.

Preference to an OAW-IAP with 3G/4G Card

The Master Election Protocol prefers the OAW-IAP with a 3G/4G card, when electing a Virtual Controller for the

AOS-W Instant network during the initial setup. The Virtual Controller is selected based on the following criteria:

l If there is more than one OAW-IAP with 3G/4G cards, one of these OAW-IAPs is dynamically elected as the

Virtual Controller.

l When an OAW-IAP without 3G/4G card is elected as the Virtual Controller but is up for less than 5 minutes,

another OAW-IAP with 3G/4G card in the network is elected as the Virtual Controller to replace it and the

previous Virtual Controller reboots.

l When an OAW-IAP without 3G/4G card is already elected as the Virtual Controller and is up for more than 5

minutes, the Virtual Controller will not be replaced until it goes down.

OAW-IAP135 is preferred over OAW-IAP105 when a Virtual Controller is elected.

Preference to an OAW-IAP with Non-Default IP

The Master Election Protocol prefers an OAW-IAP with non-default IP, when electing a Virtual Controller for the

AOS-W Instant network during initial startup. If there are more than one OAW-IAP with non-default IPs in the

network, all OAW-IAPs with default IP will automatically reboot and the DHCP process is used to assign new IP

addresses.

Manual Provisioning of Master OAW-IAP

In most cases, the master election process automatically determines the best OAW-IAP that can perform the role of

Virtual Controller, which will apply its image and configuration to all other OAW-IAPs in the same AP management

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Alcatel-Lucent IAP93 Podręcznik Użytkownika Strona 82