This RowStatus object controls adding or removing a tracked-interface entry for a VRRP virtual router: setting it to active(1) or createAndGo(4) adds the specified interface to the list of interfaces this virtual router monitors for failover purposes, while destroying the entry removes that tracked interface. An administrator uses this to configure exactly which physical or logical interfaces a given VRRP instance should watch, since losing any one tracked interface can trigger the priority reduction and subsequent failover behavior. For example, an administrator might add a WAN uplink interface as a tracked interface here so that losing that specific uplink (rather than any interface at all) triggers this VRRP router to step down in favor of its backup.