57
DarkStar User Guide
4: Troubleshooting
www.xkl.com
4.2.2 Networking Issues
This section covers issues related to interface connections, configuration, and operation.
DXMOS fails to load /
600-second timeout.
Incorrect TFTP boot configuration.
TFTP server unavailable or unreachable.
Incorrect configuration data (e.g. wrong IP
address, wrong routes, etc.)
Boot DXMOS from flash image, correct the
boot TFTP configuration entries, save the
corrected configurations in
startup-
config
or a remote DHCP config, then
reload DXMOS.
Either correct TFTP server availability or
boot DXMOS from flash image.
Verify that systems interposed between
this system and the TFTP server are
configured to forward packets.
Miniboot (embedded in
gateware) or Boot fails.
Corrupted gateware or Boot on startup
flash chip.
Contact XKL technical support.
TABLE 4.2
Networking Troubleshooting Matrix
Symptom
Possible Cause
Possible Solution
Interface down.
Fiber not connected.
Dirty fiber.
Failed laser or XFP/SFP module(s).
Connect with clean fiber.
Replace failed component. DarkStar
modules are hot-swappable.
LOS (Loss of Signal) or LOL
(Loss of Lock) on client or
wave interfaces.
Incorrect encapsulation type.
Incorrect switch configuration.
Verify encapsulation types at transmit and
receive endpoints and ensure they are the
same.
System reports erroneous
XFP/SFP receive power
values.
External BERT is connected at different
clock rate from system.
Excessive uncompensated dispersion in
the link.
Synchronize BERT.
Compensate link dispersion.
Insufficient receive optical
power / Insufficient
transmit optical power /
interface status flapping
up/down.
No wave laser transmission.
Laser administratively disabled.
Low optical power from customer
equipment.
Laser failure.
Run diagnostics and /or replace laser.
Verify optical receive power and interface
state using a
show interface
command. If necessary, execute
no
laser shutdown
to enable the affected
interface(s).
Investigate external customer equipment.
Replace laser module.
TABLE 4.1
System Troubleshooting Matrix
Symptom
Possible Cause
Possible Solution