Netgear GS516TNA GS516T Reference Manual - Page 20

CHAPTER 5: TROUBLESHOOTING This chapter provides information about troubleshooting the NETGEAR Model GS516T Copper Gigabit Switch. Table 5-1 lists symptoms, causes, and solutions of possible problems. Table 5-1. Troubleshooting Information Symptom Cause Solution Power LED is off. No power is received at the switch. Check the power cord connections for the switch and the connected device. Make sure all cables used are correct and comply with Ethernet specifications. 1000M or 100M LED is off or intermittent. Port connection is not functioning. Check the crimp on the connectors and make sure that the plug is properly inserted and locked into the port at both the switch and the connecting device. Make sure all cables used are correct and comply with Ethernet specifications. See Appendix C. Check for a defective adapter card, cable, or port by testing them in an alternate environment where all products are functioning. File transfer is slow or performance degradation is a problem. Half- or full-duplex setting on the switch and the connected device are not the same. Make sure the remote link partner is set to auto negotiate. A segment or device is not recognized as part of the network. One or more devices are not properly connected, or cabling does not meet Ethernet guidelines. Verify that the cabling is correct. Be sure all cable connectors are securely positioned in the required ports. Equipment may have been accidentally disconnected. COL LED is blinking yellow excessively. Collisions are occurring on the connected segment. Duplex modes are mismatched. Some collisions are normal when the connection is operating in half-duplex mode. Recheck the link partner settings. troubleshooting 5-1