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VRRP official article

Sub-menu level: /interface vrrp

/interface vrrp

interface (string; Default: ) - interface name on which VRRP instance will be running run.

vrid (integer: 1..255; Default: 1) - Virtual Router identifier. Each Virtual router must have unique id number.

priority (integer: 1..254; Default: 100) - priority of VRRP node used in Master election algorithm. Higher number i higher priority. '255' is reserved to Router that owns IP and '0' is reserved for Master router to indicate that it is releasing responsibility.

interval (string; Default: 1) - VRRP update interval in seconds. Defines how often master sends advertisement packets.

preemption-mode (yes,no; Default: yes) - whether master node always has the priority. When set to 'no' backup node will not be elected to be a master until the current master fail even if the backup node has higher priority than the current master.

authentication (ah,none,simple; Default: none) - authentication method to use for VRRP advertisement packets.

Type Description
none should be used only in low security networks (e.g., two VRRP nodes on LAN).
ah IP Authentication Header. This algorithm provides strong protection against configuration errors, replay attacks, and and packet corruption/modification. Recommended when there is limited control over the administration of nodes on a LAN.
simple uses clear text password. Protects against accidental misconfiguration of routers on local network.