Dell Force10 S25N-S50N FTOS Command Line Reference Guide FTOS 8.4.2.7 E-Series - Page 995

Parameters object-id ip-address/ prefix-len vrf vrf-name Enter the ID number of the tracked object. Range: 1 to 65535. Enter an IPv4 address in dotted decimal format. Valid IPv4 prefix lengths are from /0 to / 32. (Optional) E-Series only: You can configure a VPN routing and forwarding (VRF) instance to specify the virtual routing table to which the tracked route belongs. Defaults None Command Modes CONFIGURATION Command History Version 8.4.1.0 Introduced Related Commands show track track ip route metric threshold Display information about tracked objects, including configuration, current state, and clients which track the object. Configure object tracking on the threshold of an IPv4 route metric. Usage Use this command to create an object that tracks the reachability of an IPv4 route. In order for a route's Information reachability to be tracked, the route must appear as an entry in the routing table. A tracked IPv4 route is considered to match an entry in the routing table only if the exact IPv4 address and prefix length match a table entry. For example, when configured as a tracked route, 10.0.0.0/24 does not match the routing table entry 10.0.0.0/8. If no route-table entry has the exact IPv4 address and prefix length, the status of the tracked route is considered to be DOWN. When you configure IPv4 route reachability as a tracked object, the UP/DOWN state of the tracked route is also determined by the entry of the next-hop address in the ARP cache. A tracked route is considered to be reachable if there is an ARP cache entry for the route's next-hop address. If the next-hop address in the ARP cache ages out for a route tracked for its reachability, an attempt is made to regenerate the ARP cache entry to see if the next-hop address appears before considering the route DOWN. Object Tracking | 995