Tracking IP Prefix Reachability

You can use the track command to define an IPv4 prefix object and track its reachability. The show track command displays the tracked information for any specified objects.

show track

• Use to display tracking details for the object you specify.
• Field descriptions
  • Track—Name of the object being tracked
  • IP Route—IP prefix being tracked
  • Virtual router—Virtual router on which the object resides
  • First-hop interface—Outgoing interface to reach the prefix
  • changes—Number of times the object has changed state
  • Tracked by—Application that is doing the tracking
• Example

  host1(config)#show track ERX_Bangalore
  
  

  Track ERX_Bangalore
   IP Route 1.1.1.0 255.255.255.0 reachability
   in virtual router 1
   Reachability is Up
   First-hop interface is FastEthernet3/0
   2 change(s)
  Tracked by:
   Vrrp in virtual router 1

• See show track.

show track brief

• Use to display a one-line summary of all objects being tracked.
• Field descriptions
  • Object—Name of the object being tracked
  • Type—Type of object being tracked
  • Parameter—Parameter type being tracked
  • Value—State of the object being tracked
• Example

  host1(config)#show track brief
  
  

  Object  Type             Parameter        Value
  ERX-WF  IP-route         reachability     Up
  ERX-BNG IP-route         reachability     Up

• See show track brief.

track

• Use to create an IPv4 object and to track its reachability.
• The name of the object must be unique for the chassis.
• Use the vrf keyword to specify the VRF on which the IP prefix resides.
• Example

  host1(config)#track ERX_Bangalore vrf VR1 ip-route 10.10.24.6 255.255.0.0 reachability

• Use the no version to delete the object and stop tracking for that object.
• See track.

Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice.