Dell PowerSwitch S4128F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 797

1. Configure object tracking in CONFIGURATION mode. track object-id 2. Enter the host IP address for reachability of an IPv4 or IPv6 route in OBJECT TRACKING mode. [ip | ipv6] host-ip-address reachability 3. Configure the time delay used before communicating a change in the status of a tracked route in OBJECT TRACKING mode. delay [up seconds] [down seconds] 4. Track the host by checking the reachability periodically in OBJECT TRACKING mode. reachability-refresh interval 5. View the tracking configuration and the tracked object status in EXEC mode. show track object-id Configure IPv4 host tracking OS10 (conf-track-1)# track 2 OS10 (conf-track-2)# ip 1.1.1.1 reachability OS10 (conf-track-2)# do show track 2 IP Host 1.1.1.1 reachability Reachability is DOWN 1 changes, Last change 2017-04-26T06:45:31Z OS10 (conf-track-2)# Configure IPv6 host tracking OS10 (conf-track-2)# track 3 OS10 (conf-track-3)# ipv6 20::20 reachability OS10 (conf-track-3)# delay up 20 OS10 (conf-track-3)# do show track 3 IP Host 20::20 reachability Reachability is DOWN 1 changes, Last change 2017-04-26T06:47:04Z OS10 (conf-track-3)# Set tracking delays You can configure an optional Up or Down timer for each tracked object. The timer allows you to set the time delay before a change in the state of a tracked object communicates to the clients. The time delay starts when the state changes from Up to Down or from Down to Up. If the state of an object changes back to its former Up or Down state before the timer expires, the timer is canceled without notifying the client. If the timer expires and an object's state has changed, a notification is sent to the client. For example, if the Down timer is running and an interface goes down then comes back up, the Down timer is canceled. The client is not notified of the event. If you do not configure a delay, a notification is sent when a change in the state of a tracked object is detected. The time delay in communicating a state change is specified in seconds. Object tracking As a client, VRRP can track up to 20 interface objects plus 12 tracked interfaces supported for each VRRP group. You can assign a unique priority-cost value, from 1 to 254, to each tracked VRRP object or group interface. If a tracked VRRP object is in a Down state, the priority cost is subtracted from the VRRP group priority. If a VRRP group router acts as owner-master, the run-time VRRP group priority remains fixed at 255. Changes in the state of a tracked object have no effect. In VRRP object tracking, the sum of the priority costs for all tracked objects and interfaces cannot equal or exceed the priority of the VRRP group. Layer 3 797