CCNA 640-802 Certification Exam Training: Frame Relay LMI And LMI Autosense

Are you looking to become CCNA certified? If so, then one of the topics that you will need to learn about is Frame Relay LMI and LMI Autosense. This is a critical component of the 640-802 certification exam, and it’s important to make sure you understand it fully before taking the exam. In this blog post, we will be discussing Frame Relay LMI and LMI Autosense in detail, including how to configure it and how it works. We will also provide some helpful tips to help you better prepare for the 640-802 certification exam.

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Basics of Frame Relay LMI
Frame Relay is a type of wide area network (WAN) protocol that utilizes virtual circuits for transmitting data over a shared medium. It works by creating permanent virtual circuits (PVCs) between two devices and then exchanging data over these PVCs. One of the key components of Frame Relay is the Local Management Interface (LMI). This protocol is responsible for keeping track of the status of the PVCs, making sure that they are always active and available for data transmission. The LMI also includes a feature called LMI Autosense, which allows Frame Relay nodes to automatically detect the version of LMI in use on the network and adjust their settings accordingly. By leveraging this feature, network administrators can quickly deploy Frame Relay networks without having to manually configure each node.

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Cisco IOS Commands for LMI
Frame Relay Link Management Interface (LMI) and LMI Autosense are key components of the Cisco CCNA 640-802 certification exam. It is important to understand the commands related to LMI in order to pass the exam. In this section, we will explore some of the IOS commands for LMI that you should know for the certification exam.
The first command to be aware of is show frame-relay lmi. This command displays the status of LMI operations on a Frame Relay interface. It shows information such as the DLCI numbers, status of each Virtual Circuit (VC), number of packets sent and received, errors, and other important information.
The next command to know is frame-relay lmi-type. This command allows you to set the type of LMI being used on the Frame Relay interface. The three different types available are Cisco, ANSI Annex D, and Q933A. Each one of these LMI types has its own unique characteristics that you should be aware of when setting up your Frame Relay network.
The frame-relay interface-dlci command is also important to know. This command assigns a DLCI number to a Frame Relay virtual circuit. This command must be used in conjunction with the frame-relay map command which maps an IP address to a DLCI. This mapping is necessary for routers to route packets correctly over a Frame Relay network.

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Finally, the frame-relay lmi-autosense command is useful for troubleshooting LMI issues on a Frame Relay interface. This command allows the router to automatically detect what type of LMI is being used on an interface. This can be very helpful if you are having trouble getting an interface to come up correctly.
By understanding the commands related to LMI in the Cisco IOS, you will be able to successfully configure and troubleshoot your Frame Relay networks and pass your CCNA 640-802 certification exam.

Verifying LMI Configuration
Verifying your Frame Relay LMI configuration is a crucial step in making sure your network is functioning properly. To do this, you will need to use two different commands: show frame-relay lmi and show frame-relay map. The former will provide information about the status of the LMI settings on each interface, while the latter will show any configured virtual circuits and the associated frame-relay traffic. It is important to make sure the settings match up and that all virtual circuits are working as expected. This can be done by verifying that the configured LMI autosense setting matches the one reported by show frame-relay lmi. If not, it could indicate a problem with the configuration or with the hardware.