Cisco N7K-C7010 Configuration Guide - Page 36

Licensing Requirements Chapter 2 Configuring Basic Interface Parameters Send document comments to [email protected] If you delete a specific configuration for a specified range of interfaces using the interface configuration mode, that configuration is also deleted from the port profile for that range of interfaces only. For example, if you have a channel group inside a port profile and you are in the interface configuration mode and you delete that port channel, the specified port channel is also deleted from the port profile as well. Just as in the device, you can enter a configuration for an object in port profiles without that object being applied to interfaces yet. For example, you can configure a virtual routing and forward instance (VRF) without it being applied to the system. If you then delete that VRF and attendant configurations from the port profile, the system is unaffected. After you inherit a port profile on an interface or range of interfaces and you delete a specific configuration value, that port-profile configuration will not be operative on the specified interfaces. If you attempt to apply a port profile to the wrong type of interface, the system returns an error. When you attempt to enable, inherit, or modify a port profile, the system creates a checkpoint. If the port-profile configuration fails, the system rolls back to the prior configuration and returns an error. A port profile is never only partially applied. Time Domain Reflectometry Cable Diagnostics Beginning with Cisco NX-OS Release 5.0(2) for the Cisco Nexus 7000 Series devices and the introduction of the latest generation of line cards, you can perform cable diagnostics without the use of expensive third party equipment. With the cable diagnostic capabilities embedded directly in the line cards, you no longer need to unplug cables and connect cable testers to diagnose a link fault. Each port on the line card can independently detect cabling issues and report them to the switch software using a new technology called Time Domain Reflectometry (TDR). TDR is a technique used to analyze a conductor by transmitting a pulsed waveform signal into it then examining the polarity, amplitude, and round trip time of the reflected waveform. By estimating the speed of propagation of the signal in the cable and by measuring the time it takes for its reflection to travel back to the source, it is possible to measure the distance to the reflecting point. Also, by comparing the polarity and amplitude of the original pulse with its reflection it is possible to distinguish between different types of faults, for example, open or shorted pairs. Being able to remotely diagnose a cable failure, you can now identify the root cause of a problem more quickly and more effectively, providing your users with a prompt response to connectivity issues. Licensing Requirements The following table shows the licensing requirements for this feature: Product Cisco NX-OS License Requirement The basic interface parameters require 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 Cisco NX-OS licensing scheme, see the Cisco NX-OS Licensing Guide. Note Using VDCs requires an Advanced Services license. 2-12 Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x OL-23435-03