Specifications

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16-10
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 16 Configuring Object Tracking
Configuring Object Tracking
Configuring an Object Tracking Delay
You can configure a delay for a tracked object or an object track list that delays when the object or list
triggers a stage change. The tracked object or track list starts the delay timer when a state change occurs
but does not recognize a state change until the delay timer expires. At that point, Cisco NX-OS checks
the object state again and records a state change only if the object or list currently has a changed state.
Object tracking ignores any intermediate state changes before the delay timer expires.
For example, for an interface line-protocol tracked object that is in the up state with a 20 second down
delay, the delay timer starts when the line protocol goes down. The object is not in the down state unless
the line protocol is down 20 seconds later.
You can configure independent up delay and down delay for a tracked object or track list. When you
delete the delay, object tracking deletes both the up and down delay.
You can change the delay at any point. If the object or list is already counting down the delay timer from
a triggered event, the new delay is computed as the following:
• If the new configuration value is less than the old configuration value, the timer starts with the new
value.
• If the new configuration value is more than the old configuration value, the timer is calculated as the
new configuration value minus the current timer countdown minus the old configuration value.
SUMMARY STEPS
1. configure terminal
2. track object-id {parameters}
3. track track-number list {parameters}
4. delay {up up-time [down down-time] | down down-time [up up-time]}
5. (Optional) show track
6. (Optional) copy running-config startup-config
DETAILED STEPS
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
track object-id {parameters}
Example:
switch(config)# track 2 ip route
192.0.2.0/8 reachability
switch(config-track)#
Creates a tracked object for a route and enters tracking
configuration mode. The object-id range is from 1 to
500. The prefix format for IP is A.B.C.D/length, where
the length range is from 1 to 32.
Step 3
track track-number list {parameters}
Example:
switch(config)# track 1 list threshold
weight
switch(config-track#
Configures a tracked list object and enters tracking
configuration mode. Specifies that the state of the
tracked list is based on a configured threshold weight.
The track-number range is from 1 to 500.