Cisco’s HDLC Configuration and Troubleshooting for the CCNA 640-802 and CCENT Certification Exams

Are you preparing to take the Cisco CCNA 640-802 or CCENT certification exams? If so, you need to know how to properly configure and troubleshoot HDLC (High-Level Data Link Control). HDLC is a layer 2 data link protocol that provides reliable communications between network devices. Understanding and mastering this protocol is essential for success on the certification exams. In this blog post, we will discuss HDLC configuration and troubleshooting for the Cisco CCNA 640-802 and CCENT certification exams. Read on to learn more!

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What is HDLC?
High-level Data Link Control (HDLC) is a data link protocol developed by the International Organization for Standardization (ISO). It is commonly used in data communication networks, especially in Wide Area Networks (WANs) and Metropolitan Area Networks (MANs). HDLC provides reliable data transfer between two connected devices by providing error detection and correction. The protocol is based on the exchange of frames which contains control and data information. HDLC uses a sliding window mechanism to optimize data transfers.

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HDLC Configuration
The HDLC (High Level Data Link Control) protocol is an important part of the Cisco Certified Network Associate (CCNA) 640-802 and CCENT certification exams. To help you prepare for these exams, it is important to understand how to configure and troubleshoot HDLC.
The first step in configuring HDLC is to configure the encapsulation type. This can be done with the encapsulation hdlc command, which will apply HDLC to all physical interfaces that don’t already have another encapsulation type. Next, you must configure the IP address for each interface that will be using HDLC, which is done with the ip address command.

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To test your configuration, use the show interface command. This command will show the status of all of your configured interfaces, and should show that HDLC is active on the desired interfaces. If there are any errors, you can use the debug hdlc command to get more detailed information about what is causing the issue. Finally, use the show running-config command to save your configuration so that it will remain in effect even after a device reboot.

HDLC Troubleshooting