Starting/Terminating A Bert Test On A T1-F Interface; Configuring Error Packets Diffusion Restraint - HP HSR6800 Configuration Manual

Step
16. Set the number of interframe
filling tags.
17. Enable loopback and set the
loopback mode.
18. Send remote control loopback
code.
19. Set the intended bandwidth
for the T1-F interface.
20. Restore the default settings for
the T1-F interface.
21. Shut down the T1-F interface.

Starting/terminating a BERT test on a T1-F interface

BERT is operating as follows:
The local end sends out a pattern, which is to be 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 may view the state and result of the BERT test with the display ft1 serial command.
To start/terminate a BERT test on a T1-F interface:
Step
1. Enter system view.
2. Enter T1-F interface view.
3. Start a BERT test.

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).
If the packet error rate for the detection period exceeds the PER threshold, the interface automatically
shuts down to avoid the risk of error packets diffusion. At the same time, the renew timer starts. When the
timer expires, the interface automatically comes up.
Command
ft1 itf number number
ft1 loopback { local | remote |
payload }
ft1 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 }
bandwidth bandwidth-value
default
shutdown
Command
system-view
interface serial interface-number
ft1 bert pattern { 2^20 | 2^15 }
time minutes [ unframed ]
37
Remarks
Optional.
The default is 4.
Optional.
Loopback is disabled by default.
Optional.
No remote control code is sent by
default.
Optional.
Optional.
Optional.
A T1-F interface is up by default.
Remarks
N/A
N/A
By default, no BERT test is
performed.