OS10 Enterprise Edition User Guide Release 10.4.0E(R3)


Interface/object tracking

You can monitor the state of any interface according to the virtual group. OS10 supports a maximum of 10 track groups and each track group can track a maximum of five interfaces.

If the tracked interface goes down, the VRRP group’s priority decreases by a default value of 10 — also known as cost. If the tracked interface’s state goes up, the VRRP group’s priority increases by priority-cost.

The lowered priority of the VRRP group may trigger an election. As the Master/Backup VRRP routers are selected based on the VRRP group’s priority, tracking features ensure that the best VRRP router is the Master for that group. The priority cost of tracking group must be less than the configured priority on the VRRP group. If the VRRP group is configured as Owner router (priority 255), tracking for that group is disabled, regardless of the state of the tracked interfaces. The priority of the Owner group always remains at 255.

For a virtual group, track the line-protocol state or the routing status of any interface with the interface command. Enter an interface type and node/slot/port[:subport] information, or VLAN number:
  • ethernet — Physical interface (1 to 48)
  • vlan — VLAN interface (1 to 4093)

For a virtual group, track the status of a configured object with the track command and use the object number. You can also configure a tracked object for a VRRP group with this command before you create the tracked object. No changes in the VRRP group’s priority occur until the tracked object is defined and determined to be down.

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