User manual

Nortel Secure Router 8000 Series
Configuration -WAN Access 2 Serial interface configuration
Issue 5.3 (
30 March 2009) Nortel Networks Inc. 2-13
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 ] ]
2.4.2 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.
Only physical synchronous serial interfaces support the loopback command in the interface view. The
channelized serial interfaces do not support the loopback command in the interface view. For the E1/T1
channel on the CPOS interfaces, the channel loopback can be implemented. For details, refer to the
"E-carrier and T-carrier Interface Configuration" in this manual.
Action Command
Set the loopback on the serial
interface.
loopback
Configure the loopback mode on
the HSSI interface.
loopback { local | remote }