Traffic congestion can cause input/output discards on interface links, especially when translating between link speeds (10Gbps to 1Gbps for example). In most cases, an error counter will be incremented on the interface, which helps when locating where the loss occurred. If a frame becomes errored from point to point on a connection due to cabling issues, duplex problems, or other layer 1 events, the receiver will determine that the data is corrupted and drop it. The two most common causes of network packet loss are: This is the third article of our series on TCP, covering all that you need to know to troubleshoot performance problems impacting business critical applications. After considering how TCP opens and closes connections, we will now examine problems that can happen to a connection in progress, specifically network packet loss.
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