Cisco Nexus 7000 Series - Guidelines and Limitations; High Availability; Licensing Requirements for Object Tracking; Prerequisites for Object Tracking

Send document comments to nexus7k-docfeedback@cisco.com.
21-3
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 21 Configuring Object Tracking
Licensing Requirements for Object Tracking
See the “Configuring an Object Track List with a Boolean Expression” section on page 21-6 for more
information on track lists.
High Availability
Object tracking supports high availability through stateful restarts. A stateful restart occurs when the
object tracking process crashes. Object tracking also supports stateful switchover on a dual supervisor
system. Cisco NX-OS applies the runtime configuration after the switchover.
You can also use object tracking to modify the behavior of a client to improve overall network
availability.
Virtualization Support
Object tracking supports Virtual Routing and Forwarding (VRF) instances. VRFs exist within virtual
device contexts (VDCs). By default, Cisco NX-OS places you in the default VDC and default VRF
unless you specifically configure another VDC and VRF. By default, Cisco NX-OS tracks the route
reachability state of objects in the default VRF. If you want to track objects in another VRF, you must
configure the object to be a member of that VRF (see the “Configuring Object Tracking for a Nondefault
VRF” section on page 21-12).
For more information, see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration
Guide, Release 4.x and see Chapter 14, “Configuring Layer 3 Virtualization.”
Licensing Requirements for Object Tracking
The following table shows the licensing requirements for this feature:
Prerequisites for Object Tracking
Object tracking has the following prerequisite:
• If you configure VDCs, install the Advanced Services license and enter the desired VDC (see the
Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide, Release 4.x).
Guidelines and Limitations
Object tracking has the following guidelines and limitations:
• Supports up to 500 tracked objects per VDC.
• Supports Ethernet, subinterfaces, tunnels, port channels, loopback interfaces, and VLAN interfaces.
Product License Requirement
NX-OS Object tracking requires no license. Any feature not included in a license package is bundled with the Cisco
NX-OS system images and is provided at no extra charge to you. For a complete explanation of the NX-OS
licensing scheme, see the Cisco NX-OS Licensing Guide.