Fiber And Cabling - Cisco NCS 2000 series Troubleshooting Manual

General Troubleshooting
Caution
Solution
this, perform an external switch if a switch has not already occurred. Refer to the procedures in the
Troubleshooting, on page

Fiber and Cabling

This section explains problems typically caused by cabling connectivity errors. It also includes instructions
for crimping CAT-5 cable and lists the optical fiber connectivity levels.
Bit Errors Appear for a Traffic Card
Problem
Solution
The errors can be caused by synchronization problems, especially if pointer justification (PJ) errors are reported.
Moving cards into different error-free slots will isolate the cause. Use a test set whenever possible because
the cause of the errors could be external cabling, fiber, or external equipment connecting to the NCS.
Troubleshoot low optical levels using the
Faulty Fiber-Optic Connections
Problem
Solution
Solution
LAN Cables, on page
Solution
XFP Connectors, on page
Warning
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams
or view directly with optical instruments. Statement 1051.
Warning
Laser radiation presents an invisible hazard, so personnel should avoid exposure to the laser beam.
Personnel must be qualified in laser safety procedures and must use proper eye protection before
working on this equipment. Statement 300
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid
99.
A traffic card has multiple bit errors.
Faulty cabling or low optical-line levels.
Possible Cause
Bit errors on line (traffic) cards usually originate from cabling problems or low optical-line levels.
A card has multiple alarms and/or signal errors.
Possible Cause Faulty fiber-optic connections. Fiber connection problems usually occur in conjunction
with alarms.
Refer to the appropriate trouble-clearing procedure in
Faulty CAT-5 cables.
Possible Cause
Faulty CAT-5 cables can be the source of alarms and signal errors. Complete the
60.
Faulty Gigabit Interface Converters (GBICs).
Possible Cause
Faulty GBICs can be the source of alarms and signal errors. See the
61.
Faulty Fiber-Optic Connections, on page
Alarm Troubleshooting, on page 99
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
Fiber and Cabling
Alarm
59.
Crimp Replacement
Replace Faulty SFP, SFP+, or
59