1-5z Virtual router IP address-to-real MAC address mapping. When there is an IP address owner in theVRRP group, a virtual router IP address may correspond to two MAC addresses, a real MACaddress of the IP address owner and a virtual MAC address created by default. In this case, youcan map virtual router IP addresses to the real MAC address. Then hosts send packets to the IPaddress owner for layer 3 forwarding according to the real MAC address.z You need to configure the mapping between the IP addresses of the VRRP group and the MACaddress before enabling VRRP feature on an S5600 Ethernet switch. If VRRP is already enabled,the system does not support this configuration.z The number of virtual router IP addresses that can be mapped with the virtual router MAC addressis determined by the chips of the switches in the VRRP group.z A switch can belong to multiple VRRP groups. However, the number of VRRP groups supported bya switch is determined by the chip it uses. Refer to device specification for details.VRRP TimerThere are two types of VRRP timer, the VRRP advertisement interval timer and the VRRP preemptiondelay timer.VRRP advertisement interval timerz The master advertises its normal operation state to the switches within the VRRP group by sendingVRRP packets once in each specified interval (determined by the adver-interval argument).z You can adjust the interval for a master to send VRRP advertisements by setting the VRRPadvertisement interval timer. If a backup does not receive the VRRP advertisements from themaster after a period three times of the specified interval, it considers itself as the master andsends out VRRP advertisements to reelect the master.VRRP preemption delay timerz The backup may not receive a VRRP advertisement within a period three times of the specifiedinterval due to excessive network traffic or network instability. In this case, you can configure theVRRP preemption delay for backups.z If you configure the preemption delay for a backup, the switch preempts the master if it does notreceive a VRRP advertisement from the master after it waits for a period three times of theadvertisement interval and the period specified by the preemption delay.VRRP Tracking
