User manual

4 POS and CPOS interface configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
4-26 Nortel Networks Inc. Issue 5.3 (
30 March 2009)
Action Command
Check the status and statistics
of the serial interface.
display interface serial interface-number
4.6 Maintaining POS and CPOS interface
4.6.1 Resetting interface statistics
After you run the reset command to reset the statistics of the interface, all the statistics are
reset.
To reset the interface statistics, run the following reset command in the user view.
Action Command
Reset the interface
statistics.
reset counters interface [ interface-type [ interface-number ] ]
4.6.2 Setting loopback to detect whether the interface is normal
Setting the loopback (running the loopback command) causes the interfaces of the router or
the links to not work normally. Confirm the action before you set the loopback to detect the
interface.
When the router is faulty, set the local loopback to detect whether the interface works
normally. To set the local loopback function, run the following commands in the interface
view.
Action Command
Set the loopback on the POS or
CPOS interface.
loopback { local | remote }
Set the local loopback in the E1
channel of the STM-1 CPOS
interface.
e1 e1-number set loopback { local | payload |
remote }