R3303-HP HSR6800 Routers Interface Configuration Guide

33
Step Command Remarks
17. Send remote loopback control
code.
sendloopcode { fdl-ansi-llb-down |
fdl-ansi-llb-up | fdl-ansi-plb-down
| fdl-ansi-plb-up |
fdl-att-plb-down | fdl-att-plb-up |
inband-llb-down | inband-llb-up }
Optional.
No remote loopback control code
is sent by default.
18. Set the intended bandwidth
for the CT1 interface.
bandwidth bandwidth-value Optional.
19. Shut down the CT1/PRI
interface.
shutdown
Optional.
A CT1 interface is up by default.
20. Return to system view
quit N/A
21. Enter the view of the
synchronous serial interface
created on the CT1 interface.
interface serial
interface-number:set-number
N/A
22. Set the CRC mode.
crc { 16 | 32 | none }
Optional.
By default, 16-bit CRC is adopted..
Note:
1. B8ZS = Bipolar 8 zero substitution; 2. ESF = Extended super frame; 3. LOS = Loss of signal; 4. AIS = Alarm
indication signal; 5. LFA = Loss of frame align
Starting/terminating a BERT test on a CT1 interface
Bit error rate test (BERT) operates as follows:
The local end sends out a pattern, which is looped over somewhere on the line and back to the local end.
The local end then checks the received pattern for the bit error rate, and by so doing helps you determine
whether the condition of the line is good. To this end, you must configure loopback to allow the
transmitted pattern to loop back from somewhere on the line, for example, from the far-end interface by
placing the interface in far-end loopback.
You can display the state and result of the BERT test with the display controller t1 command.
To start/terminate a BERT test on a CT1 interface:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter CT1 interface view.
controller t1 number N/A
3. Start a BERT test.
bert pattern { 2^20 | 2^15 } time
minutes [ unframed ]
By default, no BERT test is
performed.
Configuring error packets diffusion restraint
Error packets diffusion occurs when the error packet received on one timeslot spreads to other timeslots.
You can suppress error packet diffusion by configuring three parameters: detection period (detect-timer),
renew-timer (renew-timer), and PER threshold (threshold).