Installation guide

18-15
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
(continued) With the
cable connected and
the line card
configured under
Cisco IOS, the LINK
LED does not
illuminate.
The optical fiber 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.
—Y Y
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.
With the optical fiber
cable connected and
the line card
configured under
Cisco IOS, the LINK
LED blinks.
The cable is not seated correctly. Unplug and replug the optical
fiber cable.
—Y Y
The GBIC module or SFP
module is not fully inserted or is
seated improperly.
Reinstall the GBIC module or SFP
module.
The optical fiber cable is dirty. Clean the optical fiber cable at
both ends. See the “Cleaning the
Fiber-Optic Connections” section
on page 18-24.
The equipment at the far end is
not operational.
Verify that the far end is enabled
and actively sending a signal
down the cable.
The equipment at the far end is
shut down.
Enable the far end port.
Negotiation is not configured
properly.
Reconfigure negotiation on both
sides. If negotiation is configured
incorrectly, the Cisco 10000 will
enable and disable the laser as it
attempts to negotiate with the far
end.
The port is shutdown. Enable the port.
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