High Availability with Floating IP Address

Introduction

Scenario: High Availability with Floating IP Address

This document describes how a company's telephone operations can be maintained during an anynode update through a high-availability configuration.

This scenario represents just one of many possible use cases for anynode's high-availability functionality. The HA capabilities are not limited to the use of a floating IP but can be tailored to various configurations. For example, it is possible to use anynode HA in Azure with a Load Balancer or Traffic Manager.

In our example, two anynode instances (Main and Standby) are operated on virtual machines in an active/passive constellation, which are connected to both a telephone system and a SIP provider. To ensure that telephony remains available during the update of an anynode instance, a floating IP address is used that can be flexibly switched between the two instances.

Two anynode instances (master and standby) run in an active/passive setup on virtual machines, connected to a phone system and SIP provider. A floating IP address allows seamless switching between instances to ensure continuous telephony during updates.

During the update process of the anynode Master instance, the Standby instance becomes active. It takes over the floating IP address from the Master instance, thereby ensuring the continuous functionality of the telephony system.

Once the update is complete, the IP address can be switched back.

In this document, we explain step by step how to set up this high-availability configuration with a floating IP Address and anynode – The Software SBC in an active/passive constellation.