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This page is under construction, and a lot doesn't make much sense.

This page shows my network availability and performance statistics connected to the Australian National Broadband Network. It bases on earlier pages that I wrote for the DSL and satellite connections.

I had hoped that with the advent of the NBN, this page would no longer be needed. Unfortunately, this has proven not to be the case. While I don't have issues with throughput, the availability has been the worst I have ever experienced, with outages of up to 48 hours. It's not clear where the problem lies, but I have observed serious issues with the DHCP authentication that my ISP uses. More here when I understand the situation better.

The graphs show:

The graphs were made with gnuplot, and I'm not very happy with the smoothing. In particular, the right-hand side of smoothed graphs has too much influence, and it's easy to get the false impression that the link status or TCP speed have changed significantly in the last few minutes. If anybody can point me at a way to fix this problem, I'd be grateful.

Click on the graphs for a 1600x1200 version.

NBN link statistics NBN link statistics

NBN link statistics NBN link statistics

NBN link statistics NBN link statistics

Detailed outage information

This section monitors the NBN for outages. I have a program that evaluates the outage information and produces detailed outage information. Here's the information on the past 10 outages, along with the overall statistics:

Start time End time  Duration   Badness        from                    to
                     (seconds)

1477326660 1477326746     86	  0.002	# 25 October 2016 03:31:00 25 October 2016 03:32:26
1479024682 1479024886    204	  0.002	# 13 November 2016 19:11:22 13 November 2016 19:14:46
1479515108 1479523583   8475	  0.007	# 19 November 2016 11:25:08 19 November 2016 13:46:23
1479524161 1479524329    168	  6.228	# 19 November 2016 13:56:01 19 November 2016 13:58:49
1479557450 1479557508     58	  0.109	# 19 November 2016 23:10:50 19 November 2016 23:11:48
1480029138 1480029486    348	  0.008	# 25 November 2016 10:12:18 25 November 2016 10:18:06
1484139401 1484139570    169	  0.001	# 11 January 2017 23:56:41 11 January 2017 23:59:30
1484139896 1484140033    137	 11.043	# 12 January 2017 00:04:56 12 January 2017 00:07:13
1484140235 1484140337    102	 17.822	# 12 January 2017 00:10:35 12 January 2017 00:12:17
1484142924 1484142991     67	  1.392	# 12 January 2017 00:55:24 12 January 2017 00:56:31

Total 252 outages, total time -91829327 seconds (-25508:-8:-47)
Average time between outages:	0 seconds (00:00:00)
Average duration:		-364402 seconds (-101:-13:-22)
Availability:			-834811904.00%
      

“Badness” is an attempt to quantify the effect. It's the reciprocal of the number of seconds per hour that the link was up between failures (i.e. 3600 / uptime).

And here is the summary information for the past 10 days with a less than 100% record:

Date        Outages   Duration  Availability    Date
                      (seconds)
1463580000	  2	  1096	 98.73%	# 19 May 2016
1467208800	  1	   267	 99.69%	# 30 June 2016
1473170400	  1	   692	 99.20%	#  7 September 2016
1474984800	  1	 13867	 83.95%	# 28 September 2016
1477314000	  1	    86	 99.90%	# 25 October 2016
1478955600	  1	   204	 99.76%	# 13 November 2016
1479474000	  3	  8701	 89.93%	# 19 November 2016
1479992400	  1	   348	 99.60%	# 25 November 2016
1484053200	  1	   169	 99.80%	# 11 January 2017
1484139600	  3	   306	 99.65%	# 12 January 2017
      

The dates in the left columns are in UNIX time_t format to ease further processing. I also have lists of all individual outages, or summaries per day.


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