Cisco 12406 - Manual (Page 31)

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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter 4 Troubleshooting the Installation
Problem Solving with Subsystems
Troubleshooting the Line Cards
Line cards can be installed in slots in the card cage. As each line card powers up,
a power-on self-test (POST) is performed on the line card memory. A full set of
field diagnostics can also be run on a line card from the system console, providing
a pass/fail message both in the line card alphanumeric LED display and on the
system console.
To help isolate a problem with the line cards, visually check the two alphanumeric
LED displays to determine whether both display banks are on.
The two displays are powered separately. The left display receives power from the
DC-DC converter on the line card. The right display is powered directly from the
backplane. Therefore, even if the line card has not powered up, the right display
could be on. If both displays are off, the line card might not be fully plugged into
the backplane connector, there might be a problem with the MBus module on the
line card, or system power might be off.
If both displays are on, check the message being displayed. As soon as the DC-DC
converter is turned on by the MBus module, the processor on the line card begins
the boot process. Status messages are displayed in the alphanumeric displays as
the boot process continues on the line card.
Table 4-9 provides a list of messages that can be displayed by the line card
alphanumeric LED display. Some of these messages are displayed only for a
fraction of a second; others last for several seconds.
Table 4-9 Line Card Alphanumeric LED Display Messages
LED Display
1
Indications
2
MEM
TEST POST memory test running
LROM
RUN POST memory test has finished running
BSS
INIT Initialize main memory for ROM
RST
SAVE Save reset reason register
IO
RST Reset the I/O system on the card