Troubleshooting - TP-Link TL-SG3109 Cli Reference Manual

Troubleshooting

This section describes problems that may arise when installing the and how to resolve these issue. This section
includes the following topics:
•
Problem Management — Provides information about problem management with the device.
•
Troubleshooting Solutions — Provides a list of troubleshooting issues and solutions for using the device.
Problem Management
Problem management includes isolating problems, quantifying the problems, and then applying the solution.
When a problem is detected, the exact nature of the problem must be determined. This includes how the problem
is detected, and what are the possible causes of the problem. With the problem known, the effect of the problem is
recorded with all known results from the problem. Once the problem is quantified, the solution is applied. Solutions
are found either in this chapter, or through customer support. If no solution is found in this chapter, contact Cus-
tomer Support.
Troubleshooting Solutions
Listed below are some possible troubleshooting problems and solutions. These error messages include:
•
Cannot connect to management using RS-232 serial connection
•
Cannot connect to switch management using Telnet, HTTP, SNMP, etc.
•
Self-test exceeds 15 seconds
•
No connection is established and the port LED is on
•
Device is in a reboot loop
•
No connection and the port LED is off
•
Add and Edit pages do not open.
•
Lost password.
P r o bl e m s
Cannot connect to manage-
ment using RS-232 serial
connection
Cannot connect to switch
management using Telnet,
HTTP, SNMP, etc.
TL-SG3109/TL-SL3428/TL-SL3452 Gigabit Managed Switch Family CLI Reference Guide
P os s i bl e C a u s e
Page 338
S ol ut i o n
Be sure the terminal emulator program is
set to VT-100 compatible, 38 400 baud
rate, no parity, 8 data bits and one stop bit
Use the included cable, or be sure that the
pin-out complies with a standard null-
modem cable
Be sure the switch has a valid IP address,
subnet mask and default gateway config-
ured
Check that your cable is properly con-
nected with a valid link light, and that the
port has not been disabled
Ensure that your management station is
plugged into the appropriate VLAN to
manage the device
If you cannot connect using Telnet or the
web, the maximum number of connections
may already be open. Please try again at
a later time.