Nutanix Certified Associate Practice Exam

What is a likely cause of receiving high CRC errors on a host interface?

1. Incorrect link speeds on the switch

2. The interface is incorrectly configured with Jumbo Frames

3. A physical layer network problem

4. A misconfigured bond

The correct answer is: The interface is incorrectly configured with Jumbo Frames

Receiving high CRC (Cyclic Redundancy Check) errors on a host interface typically indicates issues with data integrity as it travels over the network. When examining the cause of these errors, one common factor is the configuration of the network interfaces involved. Jumbo Frames allow for larger packet sizes than standard Ethernet frames, which can improve network efficiency, particularly in environments dealing with large amounts of data. However, if one side of the communication path is configured for Jumbo Frames and the other side is not, this mismatch can lead to the transmission of packets that are larger than what the receiving device can handle. As a result, packets may become malformed during transmission, leading to CRC errors that are counted when packets are received but cannot be correctly interpreted. While link speed mismatches, physical layer network problems, and misconfigured bonds can also contribute to CRC errors, issues stemming from Jumbo Frame configurations are particularly prominent in environments that utilize advanced networking features but do not have uniform settings across devices. Ensuring consistent frame sizes across network components is essential for maintaining data integrity and reducing error rates on the network.