![]() This document describes what a CRC is, how it is used in the Frame Check Sequence (FCS) field of Ethernet frames, how CRC errors manifest on Nexus switches, how CRC errors interact in Store-and-Forward switching and Cut-Through switching scenarios, the most likely root causes of CRC errors, and how to troubleshoot and resolve CRC errors. This document describes details surrounding Cyclic Redundancy Check (CRC) errors observed on interface counters on Cisco Nexus series switches. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. ![]() The information in this document was created from devices in a specific lab environment. Nexus 3000 series switches starting from NX-OS software release 9.3(8).Nexus 9000 series switches starting from NX-OS software release 9.3(8).The information in this document is based on these software and hardware versions: Cisco Nexus 9000 Series NX-OS Fundamentals Configuration Guide, Release 7.x.Cisco Nexus 9000 Series NX-OS Fundamentals Configuration Guide, Release 9.2(x).Cisco Nexus 9000 Series NX-OS Fundamentals Configuration Guide, Release 9.3(x).Cisco Nexus 9000 NX-OS Fundamentals Configuration Guide, Release 10.2(x).For more information, refer to one of these applicable documents: Prerequisites RequirementsĬisco recommends that you understand the basics of Ethernet switching and the Cisco NX-OS Command Line Interface (CLI). This document describes details surrounding Cyclic Redundancy Check (CRC) errors observed on interface counters and statistics of Cisco Nexus switches.
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