Auto-Negotiation; Troubleshooting - Planet FGSW-2620 User Manual

3.5 Auto-Negotiation

The STP ports on the Switch have built-in "Auto-negotiation". This technology automatically
sets the best possible bandwidth when a connection is established with another network
device (usually at Power On or Reset). This is done by detect the modes and speeds at
the second of both device is connected and capable of, both 10Base-T and 100Base-TX
devices can connect with the port in either Half- or Full-Duplex mode. 1000Base-T can be
only connected in Full-duplex mode.
If attached device is:
• 10Mbps, no auto-negotiation
• 10Mbps, with auto-negotiation
• 100Mbps, no auto-negotiation
• 100Mbps, with auto-negotiation

4. TROUBLESHOOTING

This chapter contains information to help you solve problems. If the Ethernet Switch is not
functioning properly, make sure the Ethernet Switch was set up according to instructions
in this manual.
The per port LED is not lit
Solution:
Check the cable connection of the FGSW-2620.
Performance is bad
Solution:
Check the speed duplex mode of the partner device. The FGSW-2620 is run
at Auto-negotiation mode and if the partner is set to half duplex, then the
performance will be poor.
Per port LED is lit, but the traffic is irregular
Solution:
Check that the attached device is not set to dedicate full duplex. Some devices use
a physical or software switch to change duplex modes. Auto-negotiation may not
recognize this type of full-duplex setting.
Why the Switch doesn't connect to the network
Solution:
Check per port LED on the switch. Try another port on the Switch Make sure the
cable is installed properly Make sure the cable is the right type Turn off the power.
After a while, turn on power again.
8
100Base-TX port will set to:
10Mbps
10/20Mbps (10Base-T/Full-Duplex)
100Mbps
100/200Mbps (100Base-TX/Full-Duplex)