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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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This page has information to those customers who have kindly offered to help in diagnosing the ongoing peak time slow throughput problems we've been seeing in February and March 2017.
*'''Update March 28''' This has been fixed! a BIG thank you to all the customers involved. More details on the status page https://aastatus.net/2358
==Summary==
On TalkTalk DSL circuits we've been seeing slow single thread TCP throughput in the evenings.
This has been reported to TalkTalk by other ISPs, and it's also been seen on TalkTalk EAD and EoFTTC circuits.
This page was written 2017-03-10 and we expect to need to run tests over the next 7 days.
===Installing iperf3
iperf3 on linux systems should be available in your normal software repositories,
Debian based systems:
sudo apt-get install iperf3
This will listen on the default port of 5201. It will run on the console, so may be best run in a screen session or as a background daemon (-D option) as otherwise it will stop if you close the console etc.
If you are using a systemd-based Linux, and would like iperf3 to start automatically on each boot see https://scottlinux.com/2014/12/08/how-to-create-a-systemd-service-in-linux-centos-7/
===IPs to allow:===▼
Please allow these IPs to access your machine on TCP port 5201▼
90.155.53.38▼
▲Please allow these IPs to access your machine on TCP port 5201. These are three machines in different datacentres on the A&A network.
2001:8b0:0:53::38▼
81.187.30.90▼
90.155.23.30
▲ 90.155.53.38
2001:8b0:0:23::30
▲ 81.187.30.90
2001:8b0:0:30::90
▲ 2001:8b0:0:53::38
Here is a pre-made rule for a FireBrick, change the IPs in the target-ip= element to your own:
<syntaxhighlight lang=xml>
<rule name="TTiperf" source-ip="81.187.30.90 90.155.23.30 90.155.53.38 2001:8b0:0:23::30 2001:8b0:0:30::90 2001:8b0:0:53::38" target-ip="217.169.31.51 2001:8b0:119c:acf2::3" target-port="5201" action="accept"/>
</syntaxhighlight>
==Let us know you're up==
==What we'll then do==
We will then run
UPDATE
=Many thanks!=
=Results=
Here is an example from 11 March:
[[File:Tt-examples.png]]
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