D-Link xStack DXS-3250E Web/Installation Manual page 392

P r o bl em s
Cannot connect to man-
agement using RS-232
serial connection
Cannot connect to
switch management
using Telnet, HTTP,
SNMP, etc.
No response from the
terminal emulation soft-
ware
Response from the ter-
minal emulations soft-
ware is not readable
Self-test exceeds 15
seconds
No connection is estab-
lished and the port LED
is on
Device is in a reboot
loop
P os si bl e C au se
Faulty serial cable
Incorrect serial cable
Software settings
Faulty serial cable
Software settings
The device may not be
correctly installed.
Wrong network address
in the workstation
No network address set
Wrong or missing proto-
col
Faulty ethernet cable
Faulty port
Faulty module
Incorrect initial configura-
tion
Software fault
Page 391
So lu t io n
Be sure the terminal emulator program is set to VT-
100 compatible, 9600 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 configured
Check that your cable is properly connected with a
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.
Replace the serial cable
Replace serial cable for a pin-to-pin straight/flat
cable
Reconfigure the emulation software connection set-
tings.
Replace the serial cable
Reconfigure the emulation software connection set-
tings.
Remove and reinstall the device. If that does not
help, consult your technical support representative.
Configure the network address in the workstation
Configure the network address in the workstation
Configure the workstation with IP protocol
Replace the cable
Replace the module
Replace the module
Erase the connection and reconfigure the port
Download and install a working or previous software
version from the console
Troubleshooting
Troubleshooting Solutions