Operation Manual – VRRPH3C S5600 Series Ethernet Switches Chapter 1 VRRP Configuration1-2Host 1EthernetSwitchNetworkHost 2 Host 310.100.10.7/24 10.100.10.9/2410.100.10.8/2410.100.10.1/24Figure 1-1 LAN networkingThe networking illustrated in Figure 1-1 requires high stability of the default gateway.Normally, adding egress gateways is used to improve the system reliability. In this case,how to route between multiple egresses needs to be solved.Virtual Router Redundancy Protocol (VRRP), an error-tolerant protocol defined in RFC2338, well solves the problem mentioned above through separating physical devicesand logical devices. In LANs with multicast or broadcast capabilities (such as Ethernet),VRRP can avoid single point failure through establishing backup links withoutmodifying the configuration of dynamic routing protocols and router discoveryprotocols.1.1.1 Introduction to VRRP GroupVRRP allows you to combine a group of LAN switches (including a master and severalbackups) into a VRRP group. The VRRP group functions as a virtual router, forwardingpackets as a gateway.Host 1EthernetMasterNetworkHost 2 Host 3Backup10.100.10.7/24 10.100.10.9/2410.100.10.8/24Actual IP address10.100.10.2/24Actual IP address10.100.10.3/24Virtual IP address10.100.10.1/24Virtual IP address10.100.10.1/24Figure 1-2 VRRP network diagram
