6
Troubleshooting CPOS interfaces
This section provides troubleshooting information for common CPOS interface problems.
CPOS interface and serial interface down
Symptom
A CPOS interface directly connected to another device is physically down. The serial interface
created through channelization on the CPOS interface is physically down, and the data link layer
protocol state of the serial interface is down.
Solution
To resolve the problem:
1.
Execute the
display controller cpos
interface-name
command to view the status information
of the CPOS interface.
2.
If the CPOS interface is down and an LOS or LOF error has been generated, verify the following
items:
The optical fiber is connected correctly.
The two ends use different clock mode settings (
master
at one end and
slave
at the other
end).
3.
If the CPOS interface is up but the serial interface is physically down, execute the
display
controller
cpos
interface-name
command. Determine whether the channel to which the serial
interface belongs has alarms generated.
If the channel to which the serial interface belongs has no alarms generated, the
shutdown
command might have been executed for the serial interface. Execute the
display interface
serial interface-number
command to view the status of the serial interface. If the serial interface
status is DOWN (Administratively), execute the
undo shutdown
command to bring up the
serial interface.
4.
If the serial interface is physically up but the data link layer protocol state is down, execute the
display interface serial interface-number
command. Verify that the HDLC chip of the CPOS
interface collects packet statistics correctly.
5.
If the problem persists, collect the following statistics and contact H3C Support:
Execute the
debugging physical packet
command to enable packet debugging on both
devices to verify that they can correctly send and receive packets. Collect packet sending
and receiving statistics.
Execute the
display hardware internal module cpos interface-number
statistics
command in probe view to collect statistics of the CPOS interface.
Execute the
display hardware internal module cpos interface-number
reg
0
command in
probe view to collect the CPLD information of the CPOS interface.
Execute the
display hardware internal module cpos interface-number
reg
1
command in
probe view to collect the FPGA information of the CPOS interface.
Collect the chip register information of the CPOS interface by executing the following
commands in probe view:
−
display hardware internal module cpos interface-number
reg
2
.
−
display hardware internal module cpos interface-number
reg
3
.
−
display hardware internal module cpos interface-number
reg
4
.
