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Object Tracking: IPv6 Route Tracking is not Stateful Switchover (SSO)-aware and cannot be used with Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP) in SSO mode.

Enhanced Object Tracking (EOT) provides complete separation between the objects to be tracked and the action to be taken by a client when a tracked object changes. Thus, several clients such as Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP) can register interest with a tracking process, track the same object, and each take different a action when the object changes.

Each tracked object is identified by a unique number that is specified on the tracking CLI. Client processes use this number to track a specific object.

A tracking process periodically polls tracked objects and notes any change in value. The changes in the tracked object are communicated to interested client processes, either immediately or after a specified delay. The object values are reported as either up or down.

The Object Tracking: IPv6 Route Tracking feature expands EOT functionality to allow the tracking of IPv6 routes.

SUMMARY STEPS

1.    track timer interface {seconds | msec milliseconds}


2.    track object-number interface type number ipv6 routing


3.    carrier-delay


4.    delay {up seconds [down seconds] | [up seconds] down seconds}


5.    end


6.    show track object-number

Device(config)# track timer interface 5

Device(config)# track 1 interface GigabitEthernet 0/0/1 ipv6 routing

Device(config-track)# carrier-delay

Device(config-track)# delay up 30

Device(config-track)# end

Device# show track 1

1.    track timer ipv6 route {seconds | msec milliseconds}


2.    track resolution ipv6 route {bgp | eigrp | isis | ospf | static } resolution-value


3.    track object-number ipv6 route ipv6-address/prefix-length metric threshold


4.    delay {up seconds [down seconds] | [up seconds] down seconds}


5.    ipv6 vrf vrf-name


6.    threshold metric {up number [down number] | down number [up number ]}


7.    end


8.    show track object-number

Device(config)# track timer ipv6 route 20

Device(config)# track resolution ipv6 route eigrp 300

Device(config)# track 6 ipv6 route 2001:DB8:0:ABCD::1/10 metric threshold

Device(config-track)# delay up 30

Device(config-track)# ipv6 vrf VRF1

Device(config-track)# threshold metric up 254 down 255

Device(config-track)# end

Device# show track 6

1.    track timer ipv6 route {seconds | msec milliseconds}


2.    track object-number ip route ip-address/prefix-length reachability


3.    delay {up seconds [down seconds] | [up seconds] down seconds}


4.    ipv6 vrf vrf-name


5.    end


6.    show track object-number

Device(config)# track timer ipv6 route 20

Device(config)# track 4 ipv6 route 2001:DB8:0:AB82::1/10 reachability

Device(config-track)# delay up 30

Device(config-track)# ipv6 vrf VRF2

Device(config-track)# end

Device# show track 4