D-Link DWS/DXS-3200 manual Problem Management, Troubleshooting Solutions

DXS/DWS 3200 Series User Guide

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.

Problems	Possible Cause	Solution
Cannot connect to man-		Be sure the terminal emulator program is set to VT-
agement using RS-232		100 compatible, 9600 baud rate, no parity, 8 data bits
serial connection		and one stop bit
		Use the included cable, or be sure that the pin-out
		complies with a standard null-modem cable
Cannot connect to		Be sure the switch has a valid IP address, subnet
switch management		mask and default gateway configured
using Telnet, HTTP,		Check that your cable is properly connected with a
SNMP, etc.		valid link light, and that the port has not been dis-
		abled
		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.
No response from the	Faulty serial cable	Replace the serial cable
terminal emulation soft-	Incorrect serial cable	Replace serial cable for a pin-to-pin straight/flat
ware		cable
	Software settings	Reconfigure the emulation software connection set-
		tings.
Response from the ter-	Faulty serial cable	Replace the serial cable
minal emulations soft-	Software settings	Reconfigure the emulation software connection set-
ware is not readable		tings.

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