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Cisco BPX 8600 Series Switches

Rx FIFO Sync Errors

Cisco - Rx FIFO Sync Errors

Document ID: 10805

Updated: Dec 06, 2006

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Introduction

Rx FIFO (first-in-first-out) sync errors indicate that the receive FIFOs used by the BIF-RX circuit either got out of sync with the start of frames or with each other.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

Refer to the Cisco Technical Tips Conventions for more information on document conventions.

What Do the Errors Mean?

These errors mean that two frames have been discarded. However, those frames did not necessarily contain any user data (it is possible that these frames were fillers known as Null BFrames). When these errors occur infrequently, the errors are simply counted. If the errors happen too often, a hardware error is generated because a circuit failure can cause them.

How Can I Make Them Go Away?

Make sure you use the latest firmware. If the errors continue, replace the card.

Related Information

Updated: Dec 06, 2006
Document ID: 10805