1088 CHAPTER 87: VRRP CONFIGURATIONYou may configure different authentication modes and authentication keys for thestandby groups on an interface. However, the members of the same standbygroup must use the same authentication mode and authentication key.Factors like excessive traffic or different timer setting on switches can cause theBackup timer to time-out abnormally and change the state. To solve this problem,you can prolong the time interval to send VRRP packets and configure a delay forpreemption.Displaying andMaintaining VRRP forIPv6IPv4-Based VRRPConfigurationExamplesThis section provides these configuration examples:■ “Single VRRP Standby Group Configuration Example” on page 1088■ “VRRP Interface Tracking Configuration Example” on page 1091■ “Multiple VRRP Standby Group Configuration Example” on page 1094Single VRRP StandbyGroup ConfigurationExampleNetwork requirements■ Host A needs to access Host B on the Internet, using 202.38.160.111/24 as itsdefault gateway.■ Switch A and Switch B belong to standby group 1 with the virtual IP address of202.38.160.111/24.■ If Switch A operates normally, packets sent from Host A to Host B areforwarded by Switch A; if Switch A fails, packets sent from Host A to Host B areforwarded by Switch B.Configure the authenticationmode and authentication keywhen the standby groupssend and transmit VRRPpacketsvrrp ipv6 vridvirtual-router-idauthentication-modesimple keyOptionalAuthentication is notperformed by defaultConfigure the time interval forthe Master in the standbygroup to send VRRPadvertisementvrrp ipv6 vridvirtual-router-id timeradvertise adver-intervalOptional100 centiseconds by defaultTo do… Use the command… RemarksTo do… Use the command… RemarksDisplay VRRP status display vrrp ipv6 [verbose] [ interfaceinterface-type interface-number [ vridvirtual-router-id ] ]Available in anyviewDisplay VRRPstatisticsdisplay vrrp ipv6 statistics [ interfaceinterface-type interface-number [vridvirtual-router-id ] ]Available in anyviewRemove VRRPstatisticsreset vrrp ipv6 statistics [interfaceinterface-type interface-number [vridvirtual-router-id ] ]Available in userview
