Command History
ModificationRelease
This command was introduced.Cisco IOS XE 3.3SECisco IOS XE 3.3SE
Usage Guidelines
The tracking command overrides the default tracking policy set by the ipv6 neighbor tracking command
on the port on which this policy applies. This function is useful on trusted ports where, for example, you may
not want to track entries but want an entry to stay in the binding table to prevent it from being stolen.
The reachable-lifetime keyword is the maximum time an entry will be considered reachable without proof
of reachability, either directly through tracking or indirectly through IPv6 snooping. After the
reachable-lifetime value is reached, the entry is moved to stale. Use of the reachable-lifetime keyword with
the tracking command overrides the global reachable lifetime configured by the ipv6 neighbor binding
reachable-lifetime command.
The stale-lifetime keyword is the maximum time an entry is kept in the table before it is deleted or the entry
is proven to be reachable, either directly or indirectly. Use of the reachable-lifetime keyword with the tracking
command overrides the global stale lifetime configured by the ipv6 neighbor binding stale-lifetime command.
Examples
This example shows how to define an IPv6 snooping policy name as policy1, place the switch in IPv6 snooping
policy configuration mode, and configure an entry to stay in the binding table for an infinite length of time
on a trusted port:
Device(config)# ipv6 snooping policy policy1
Device(config-ipv6-snooping)# tracking disable stale-lifetime infinite
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
841
tracking (IPv6 snooping)
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