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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)

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
1485176786 1485178146   1360	  0.003	# 24 January 2017 00:06:26 24 January 2017 00:29:06
1486694883 1486706902  12019	  0.002	# 10 February 2017 13:48:03 10 February 2017 17:08:22
1489515279 1489515346     67	  0.001	# 15 March 2017 05:14:39 15 March 2017 05:15:46
1490054175 1490054446    271	  0.007	# 21 March 2017 10:56:15 21 March 2017 11:00:46
1490060016 1490060300    284	  0.646	# 21 March 2017 12:33:36 21 March 2017 12:38:20

Total 257 outages, total time -97439366 seconds (-27066:-29:-26)
Average time between outages:	0 seconds (00:00:00)
Average duration:		-379141 seconds (-105:-19:-1)
Availability:			-216531824.00%
      

“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)
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
1485176400	  1	  1360	 98.43%	# 24 January 2017
1486645200	  1	 12019	 86.09%	# 10 February 2017
1489496400	  1	    67	 99.92%	# 15 March 2017
1490014800	  2	   555	 99.36%	# 21 March 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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