Slow FTTP: Difference between revisions
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* '''Run a test:-''' |
* '''Run a test:-''' |
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*# Our Control Page will allow you to run an 'End to End' test, this may if Openreach's systems detect a fault, in which case, do get in touch. eg: <tt>GTC_FTTP_SERVICE_1005 Possible fault in the Openreach network.</tt> |
*# Our Control Page will allow you to run an 'End to End' test, this may if Openreach's systems detect a fault, in which case, do get in touch. eg: <tt>GTC_FTTP_SERVICE_1005 Possible fault in the Openreach network.</tt> |
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== Single thread Vs multi thread performance problems == |
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Sometimes a speed problem occurs for single-thread transfers, whist multi-thread transfers are OK. Broadly speaking, single thread Vs multi-thread speeds should be very similar, and near the top end of the speed of your circuit. |
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These can be tricky to diagnose and fix, as sometimes the problem is down to congestion in the back-haul network. |
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As well as testing the usual things (Different computer/router/directly-wired etc) to help diagnose, we suggest using iperf3 rather than http based speed tests as iperf3 is usually more reliable. |
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Support staff can give access to our own iperf server, and then you can run tests such as: |
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Single thread transfer from us to you (testing your download) |
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iperf3 -R -c <speedtest server> |
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10-thread transfer from us to you (testing your download) |
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iperf3 -R -P 10 -c <speedtest server> |
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Single thread transfer from you to us (testing your upload) |
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iperf3 -c <speedtest server> |
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10-thread transfer from you to us (testing your upload) |
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iperf3 -P 10 -c <speedtest server> |
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Running these at different times of day will give a picture as to whether single-thread is a problem, and if it's a problem due to the time of the day. |
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== I may have packet loss == |
== I may have packet loss == |
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Get in touch with us about what you find. |
Get in touch with us about what you find. |
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[[File:FTTP-loss.png|frame|none| |
[[File:FTTP-loss.png|frame|none|Intermittent low levels of packet loss]] |
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'''Wrongly configured OLT''' |
'''Wrongly configured OLT''' |
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Packet loss with an odd pattern like this was seen after a CityFibre OLT was upgraded in March 2023 and apparently have some wrong configuration and caused around 5% loss: |
Packet loss with an odd pattern like this was seen after a CityFibre OLT was upgraded in March 2023 and apparently have some wrong configuration and caused around 5% loss: |
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[[File:FTTP-misconfig-olt.png|frame|none| |
[[File:FTTP-misconfig-olt.png|frame|none|Loss caused by a missconfigured CityFibre OLT after being having a firmware upgrade]] |
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==Slow CityFibre since migrating== |
==Slow CityFibre since migrating== |
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