Table of Contents
Advertisement
Appendix C: Troubleshooting
C.1 Power/LED Status Troubleshooting
Problem
Cause
Power LED does
Power cable is not
not light up
connected
Link LED does not
Ethernet cable is not
light up
connected
Invalid Ethernet cable is
used
ACT LED does not
Invalid IP configuration
blink
C.2 Serial Console Troubleshooting
Problem
Cause
Serial console is not
Invalid serial cable
connected
Invalid serial port
configuration of terminal
emulation program
Invalid Console/Data
switch position
Serial console is
IP mode is DHCP, but
halted for few
IP is not assigned
seconds periodically
Cannot login to
Invalid username and/or
console
password
C.3 Remote Console Troubleshooting
Problem
Cause
Cannot connect to
The LS100 is not
the LS100 using
assigned valid IP
telnet
address
Someone is using serial
console
Action
Check power connection
Check Ethernet cable connection
There are two types of Ethernet cables: Straight-through cable
and crossover cable. If you are using an Ethernet hub, use
straight-through cable. If direct connection between the LS100
and remote host is used, use crossover cable instead.
Check IP configuration parameters
Action
Be sure to use a serial console cable (null-modem cable) for
serial console
Check serial port configuration of terminal emulation program:
9600 bps, 8 Data bits, No parity, 1 stop bit, Hardware flow
control
Be sure that Console/Data switch position is Console side.
If IP mode is set to DHCP but IP is not actually assigned
because of DHCP server failure, serial console is halted for few
seconds at every 20 seconds. Change IP mode to the static IP
mode
Use valid username and password. If username and/or
password are lost, perform factory default reset using factory
reset switch. Factory default value of username and password
are both admin
Action
Use serial console to assign valid IP address to the LS100
Exit serial console and retry telnet connection
44
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
