Step-by-Step Guide#
This section provides a step-by-step guide on how to use ANLT Utility to do interactive ANLT test.
Note
⚡️ You can use tab key to auto-complete a command to speed up your input speed.
SSH to ANLT Utility#
After running the ANLT Utility SSH Server, use another console to SSH to ANLT Utility.
Connect#
First, you need to connect to your tester using the command connect.
If you don’t know which ports you will use at the time of connecting to the port, just leave the option --ports empty as the example shows below. You can reserve ports later.
xoa-utils > connect 10.10.10.10 yourname
Reserve Port#
Then, reserve a port on the tester using the command port, as shown in the example below.
Note
You can only work on one port at a time in one console window. If you want to simultaneously work on multiple ports, you can open multiple console windows.
xoa-utils[123456] > port 0/0
Start ANLT Logging#
Start ANLT logging by anlt log.
xoa-utils[123456][0/0] > anlt log -f mylog.log
Note
This commands continuously displays the log messages on the screen so you can keep track of your ANLT actions.
To quit the continuous display mode, press Control-z.
Use one terminal to view the ANLT protocol trace, and use another to execute ANLT commands, as shown in the screenshot below.
Set ANLT Shadow Configuration#
After disabling link recovery on the port, you can start setting ANLT shadow configuration using an config, lt config, lt im, and lt alg as the example shown below.
xoa-utils[123456][0/0] > an config --off --no-loopback
xoa-utils[123456][0/0] > lt config --on --preset0 ieee --mode interactive
Note
The initial modulation of each serdes on a port is by default PAM2 (NRZ). If you want to change them, you can use lt im, otherwise do nothing.
Important
an config, lt config, and lt im only change the shadow ANLT configuration. To apply the configuration, you need to run anlt start, otherwise your changes will not take effect on the tester.
Start ANLT#
After configuring the ANLT shadow configuration, you should execute anlt start to apply the shadow configuration and let the ANLT tester to start the ANLT procedure.
xoa-utils[123456][0/0] > anlt start
Use one terminal to view the ANLT protocol trace, and use another to execute ANLT commands, as shown in the sreenshot below.
Control LT Interactive#
If you run LT (interactive), you will need to manually control the LT parameters using the LT Control Commands shown in LT Group, for example:
xoa-utils[123456][0/0] > lt preset 0 2
xoa-utils[123456][0/0] > lt inc 0 pre3
xoa-utils[123456][0/0] > lt inc 0 main
xoa-utils[123456][0/0] > lt dec 0 post
xoa-utils[123456][0/0] > lt status 0
xoa-utils[123456][0/0] > lt trained 0
xoa-utils[123456][0/0] > lt txtapget 0
xoa-utils[123456][0/0] > lt txtapset 0 0 0 1 56 0
Check AN Status#
Check AN statistics by an status.
xoa-utils[123456][0/0] > an status
[AN STATUS]
Mode : enabled
Loopback : allowed
Duration : 2,068,747 µs
Successful runs : 1
Timeouts : 0
Loss of sync : 0
HCD : IEEE_800GBASE_CR8_KR8
HCD negotiation fails : 0
FEC result : RS_FEC_KP
FEC negotiation fails : 0
RX TX
Link codewords : 2 1
Next-page messages : 0 0
Unformatted pages : 0 0
Check LT Status#
Check LT statistics by lt status.
xoa-utils[123456][0/0] > lt status 0
[LT STATUS]
Is enabled : true
Is trained : true
Failure : no_failure
Initial mod. : nrz
Preset0 : standard tap values
Total bits : 2,201,372,480
Total err. bits : 24
BER : 1.09e-08
Duration : 2,000,250 µs
Lock lost : 2
Frame lock : locked
Remote frame lock : locked
Frame errors : 1
Overrun errors : 1
Last IC received : Preset 3
Last IC sent : Preset 3
TX Coefficient : c(-3) c(-2) c(-1) c(0) c(1)
Current level : 0 0 1 44 0
: RX TX RX TX RX TX RX TX RX TX
+ req : 0 0 0 0 2 2 1 1 0 0
- req : 0 0 0 0 2 2 0 0 0 0
coeff/eq limit reached : 0 0 0 0 0 0 0 0 0 0
eq limit reached : 0 0 0 0 0 0 0 0 0 0
coeff not supported : 0 0 0 0 0 0 0 0 0 0
coeff at limit : 0 0 0 0 0 0 0 0 0 0
Stop ANLT and Restart#
To stop and start ANLT again:
xoa-utils[123456][0/0] > anlt stop
xoa-utils[123456][0/0] > anlt start