Installation guide

18-8
Cisco 10000 Series Routers Line Card Hardware Installation Guide
OL-6773-04
Chapter 18 Troubleshooting the Installation
Channelized Line Cards Troubleshooting Information
T3 level LOOP
LED is blinking.
This LED blinks on line cards
that are in standby mode as part
of a pair of redundant line cards.
An active line card will set these
LEDs to off, unless a T3 level
loopback is initiated on the port.
1. No action is required if the
line card in a redundant pair
is supposed to be in standby
mode.
2. If the line card in a redundant
pair is supposed to be active
and the T3 level LOOP LED
is blinking:
a. Remove the standby line
card.
b. Remove and reinsert the
active line card.
c. Replace the active line
card.
YNN N N
With the optical
fiber cable
connected and
the line card
configured under
Cisco IOS, the
CARRIER LED
does not
illuminate.
The optical fiber cable is not
seated correctly.
Unplug and replug the optical
fiber cable.
Y—Y ——
The optical fiber cable is
plugged in backwards.
Verify that the transmit of the far
end is plugged into the receive of
the Cisco 10000 equipment and
vice versa.
The optical fiber cable is dirty. Clean the optical fiber cable on
both ends. See the “Cleaning the
Fiber-Optic Connections” section
on page 18-24.
The equipment at the far end of
the optical fiber cable is not
operational.
Verify that the far end is enabled
and actively sending a signal
down the optical fiber cable.
The optical fiber cable is the
incorrect type.
Use the correct type of the optical
fiber cable for the line card.
Far-end optics do not match the
line card optics.
Make sure the far-end optics
match the line card optics.
The optical fiber cable is too
long.
If the optical fiber cable being
used is longer than the standards
allow, use a standards-compliant
length of optical fiber cable for the
line card.
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. Be sure
to calculate the optical power
budget.
Table 18-2 Channelized Line Card Troubleshooting Information
Symptom Possible Cause Corrective Action
Ch.
T3
HH
Ch.
E1/T1
Ch.
OC-12/
STM-4
Ch.
OC-3/
STM-1
Ch.
T3