Operation Manual – VRRP-HAH3C S7500 Series Ethernet Switches Chapter 1 VRRP Configuration1-4Note:When you map a virtual IP address to the virtual MAC address on an S7500 switch, thenumber of backup groups that can be configured on a VLAN interface is determined bythe chips used. Refer to device specification for detail.1.1.2 Introduction to Backup GroupI. Configurations available on switches in a backup groupVRRP can group switches in a LAN into a virtual router, which is also known as abackup group.You can perform the following configuration on an S7500 switch that belongs to abackup group.Complete these tasks to configure switches in a backup group:Task RemarksConfiguring switch priority RequiredConfiguring preemptive mode for a switch in a backup group RequiredConfiguring authentication type and authentication key for aswitch in a backup group OptionalConfiguring VRRP timer RequiredConfiguring the VLAN interfaces/Ethernet ports to be tracked fora backup group RequiredII. Configuring switch priorityYou can configure the priority of a switch in a backup group. VRRP will determine thestatus of each switch in a backup group according to the priority of the switch. Themaster switch in a backup group is the one currently with the highest priority.Switch priority ranges from 0 to 255 (a larger number indicates a higher switch priority)and defaults to 100. Note that only 1 through 254 are available to users. Switch priorityof 255 is reserved for IP address owners.Note:The priority of the IP address owner is fixed to 255.
