Netgear Switch GSM7248 User Manual download pdf (Page 26)

Managed Layer 2 Switches GSM7224 and GSM7248 Hardware Installation Guide

3-2 Troubleshooting

v1.0, July 2009

Additional Troubleshooting Suggestions

If the suggestions in Table 3-1 do not resolve your problem, refer to the troubleshooting

suggestions in this section.

• Network adapter cards

Make sure that the network adapter cards installed in the PCs are in working condition and that

the software driver has been installed.

• Configuration

If problems occur after you change the network configuration, restore the original

connections. Then find the problem by making the changes, one step at a time. Make sure that

cable distances, repeater limits, and other physical aspects of the installation do not exceed the

Ethernet limitations.

• Switch integrity

You can verify the integrity of the switch by resetting the switch. To reset the switch, use the

Tools > Reset command, or remove AC power from the switch and then reapply AC power. If

the problem continues, contact NETGEAR Technical Support.

• Auto-negotiation

The copper 10/100/1000 Mbps ports negotiate the correct duplex mode and speed if the device

at the other end of the link supports auto-negotiation. If the device does not support auto

negotiation, the switch determines the speed, and the duplex mode defaults to half duplex. The

fiber gigabit ports negotiate speed, duplex mode, and flow control, provided that the attached

device supports auto-negotiation.

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

that all connectors are securely positioned

in the required ports. Equipment might have

been accidentally disconnected.

ACT LED is flashing

continuously on all connected

ports, and the network is

disabled.

A network loop (redundant

path) has been created.

Break the loop by ensuring that there is only

one path from any networked device to any

other networked device.

Table 3-1. Troubleshooting Chart (continued)

Problem Cause Solution

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 32 33 34

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