Multimax Redundancy with VRRP Maxon Guide

Transcription

1 Multimax Redundancy with VRRP Maxon Guide Page 1 Version 1.0 May 2014

2 C ONTACT I NFORMATION In keeping with Maxon's dedicated customer support policy, we encourage you to contact us. TECHNICAL: Hours of Operation: Monday to Friday 8.30am to 5.30pm* Telephone: Facsimile: support@maxon.com.au * Public holidays excluded SALES: Hours of Operation: Monday to Friday 8.30am to 5.30pm* Telephone: Facsimile: sales@maxon.com.au * Public holidays excluded WEBSITE: ADDRESS: Maxon Australia Pty Ltd 36a Gibson Avenue, Padstow Sydney, NSW, Australia 2211 Revision History: Revision # Date Updated by Change log /03/2014 Saroj Pandeya Release version Page 2 Version 1.0 May 2014

3 Contents Introduction Overview Objective Parts Used Application Network Scenarios... 5 Configuration Network Diagram VRRP configuration of Multimax... 8 Page 3 Version 1.0 May 2014

4 Introduction 1.1 Overview Virtual Router Redundancy Protocol (VRRP) is an IETF standard that provides a redundant router mechanism to increase the reliability of existing networks. The VRRP process provides dynamic failover of the forwarding responsibility to a Backup (secondary) router if the Master (primary) router becomes unavailable. VRRP provides the advantage of a single default path that has higher availability without requiring network devices to be reconfigured if a failure occurs. 1.2 Objective This document describes the use of Virtual Router Redundancy Protocol (VRRP) with the Maxon Multimax. VRRP is a method for increasing network uptime through the use of a backup router failover mechanism. In addition to discussing the mechanics of VRRP, this document provides step- by- step instructions for setting up the protocol on Multimax router. 1.3 Parts Used Hardware requirement:! Multimax Dual SIM Router! SIM card! Ethernet cable! Switch! PC Software requirement: No System requirement: Windows 7 (32/64), Windows Vista (32/64), Windows 2008 (32/64), Windows 2003 (32/64), Windows 2000, Windows XP (32/64) Page 4 Version 1.0 May 2014

5 1.4 Application Network Scenarios As shown in the figure below, a single router in a network represents a single point of failure. The inherent danger of this network design is obvious: if the router fails, the internet becomes unreachable. One option is simply to add a second router. This would provide redundancy, but also complicate device and address management. Typically, network managers configure hosts such as PCs and servers with a single static route the default gateway. It is technically possible for hosts to use dynamic routing protocols, and doing so would allow hosts to recognize a secondary router upon the failure of the primary router. However, this option is difficult to manage and is seldom used in practice. A better choice is to use the Virtual Router Redundancy Protocol (VRRP), which eliminates the single point of failure while maintaining a single router s ease of administration. Let s look at the same network running VRRP. In the figure below, the hub now connects to two Multimax routers. As before, the original Multimax router normally forwards traffic, but now there is a backup Multimax router standing by. Page 5 Version 1.0 May 2014

6 In the event that the primary gateway is not contactable, then VRRP ensures that the backup Multimax will automatically take over forwarding responsibilities, with no interruption in connectivity. Page 6 Version 1.0 May 2014

7 Configuration 2.1 Network Diagram 1. Multimax- Master Configuration: LAN IP address: ; Subnet mask: ; Multimax- Backup: LAN IP address: ; Subnet mask: ; 2. Although there are two Multimax in this network, the devices within the LAN only see the primary Multimax. There is only one Multimax visible in the LAN with the virtual IP address PC Configuration: LAN IP address: ; Subnet mask: ; Default gateway: DNS server: Multimax- Master and Multimax- Backup both dial up successfully and connect to the internet. Page 7 Version 1.0 May 2014

8 2.2 VRRP configuration of Multimax 1. Multimax- Master Configuration: 2. Multimax- Backup Configuration: 3. VRRP Item Description Default Enable VRRP Tick to enable VRRP protocol. VRRP (Virtual Router Redundancy Protocol) is an Internet protocol that provides a way to have one or more backup routers when using a statically configured router on a local area network (LAN).Using VRRP, a virtual IP address can be specified manually. Disable Group ID Specify which VRRP group of this router belong to. 1 Priority Enter the priority value from 1 to 255. The larger value has higher priority. 100 Interval The interval that master router sends keep alive packets to backup routers. 10 Virtual IP A virtual IP address is shared among the routers, with one designated as the master router and the others as backups. In case the master fails, the virtual IP address is mapped to a backup router's IP address. (This backup becomes the master router.) Page 8 Version 1.0 May 2014