NETGEAR GS748T - ProSafe Smart Switch User Manual

Troubleshooting A-1
v1.1, September 2007
Appendix A
Troubleshooting
This chapter provides information about troubleshooting the NETGEAR GS748T Gigabit Smart
Switch. Information is supplied as:
• A Troubleshooting chart
• Additional troubleshooting suggestions
Troubleshooting Chart
Table A-1 lists symptoms, causes, and solutions of possible problems.
Table A-1. Troubleshooting Chart
Symptom Cause Solution
Power LED is off No power is received Check the power cord connections for the switch at
the switch and the connected device
Make sure all cables used are correct and comply
with Ethernet specifications.
Link/ACT LED is off Port connection is not
working
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 D.
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 attached device is set to auto
negotiate.

NETGEAR GS748T - ProSafe Smart Switch Specifications

General

Model	GS748T
Device Type	Smart Switch
SFP Slots	4
Form Factor	Rack-mountable
Switching Capacity	96 Gbps
MAC Address Table Size	8K entries
VLAN Support	Yes
QoS	Yes
Humidity	10% to 90% non-condensing
RAM	128 MB
Flash Memory	32 MB
Power Device	Internal power supply
Ports	48 x 10/100/1000
Management	Web-based
Operating Temperature	0 - 50 °C
Voltage Required	100-240 VAC
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3z
Features	VLAN support, QoS, port mirroring, SNMP