Object Tracking | 681You can assign a unique priority-cost value from 1 to 254 to each tracked VRRP object or group interface.The priority cost is subtracted from the VRRP group priority if a tracked VRRP object is in a DOWN state.If a VRRP group router acts as owner-master, the run-time VRRP group priority remains fixed at 255 andchanges in the state of a tracked object have no effect. For more information on how to track a VRRPobject, see Track an Interface or Object on page 1139.Object Tracking ConfigurationYou can configure the following types of object tracking for a client:• Tracking a Layer 2 Interface on page 681• Tracking a Layer 3 Interface on page 682• Tracking an IPv4/IPv6 Route on page 684For a complete listing of all commands related to object tracking, refer to the FTOS Command Line Interface.Tracking a Layer 2 InterfaceYou can create an object that tracks the line-protocol state of a Layer 2 interface and monitors itsoperational status (UP or DOWN). You can track the status of any of the following Layer 2 interfaces:• 1-Gigabit Ethernet: Enter gigabitethernet slot/port in the track interface interface command (see Step 1below).• 10-Gigabit Ethernet: Enter tengigabitethernet slot/port.• Port channel: Enter port-channel number, where valid port-channel numbers are:• For the C-Series and S-Series, 1 to 128• For the E-Series, 1 to 32 (EtherScale) and 1 to 255 (TeraScale and ExaScale)• SONET: Enter sonet slot/port.• VLAN: Enter vlan vlan-id, where valid VLAN IDs are from 1 to 4094.A line-protocol object only tracks the link-level (UP/DOWN) status of a specified interface. When thelink-level status goes down, the tracked object status is considered to be DOWN; if the link-level status isup, the tracked object status is considered to be UP.Note: In VRRP object tracking, the sum of the priority costs for all tracked objects and interfaces cannotequal or exceed the priority of the VRRP group.
