Installation guide

18-16
Cisco 10000 Series Routers Line Card Hardware Installation Guide
OL-6773-04
Chapter 18 Troubleshooting the Installation
Fast Ethernet and Gigabit Ethernet Line Card Troubleshooting Information
With the optical fiber
cable connected and
the line card
configured under
Cisco IOS, the LINK
LED
blinks.(continued)
The optical fiber cable is the
incorrect type.
Use the correct type of optical
fiber cable for the type of GBIC
module or SFP module installed.
—Y Y
The far-end optics do not match
the line card optics.
Make sure the far-end optics
match the optics on the line card.
The optical fiber cable is too
long.
If the optical fiber cable is longer
than the standards allow, use a
standards-compliant length of
optical fiber cable for the GBIC
module or SFP module being
used.
The fiber optical cable is too
short.
If the optical fiber cable is too
short, the optical receiver can be
overpowered. Use an attenuator or
a longer optical fiber cable to
adjust the optical power seen at
the Cisco 10000 line card.
The optical fiber cable is broken. As an experiment to isolate the
failure, use a small loopback cable
to connect the Cisco 10000 line
card to itself. If the LED lights
under this condition, continue to
investigate cable and far end
equipment failure. Try replacing
the optical fiber cable.
Defective line card Replace the line card.
Table 18-3 Troubleshooting Fast Ethernet and Gigabit Ethernet Line Cards (continued)
Symptom Possible Cause Corrective Action
Fast
Ethernet
Gigabit
Ethernet
Half
Height
Gigabit
Ethernet