High latency and slow evening speeds (Gigafast 900)

[joshkeegan]

I see I'm not the first to be having this issue, but I'll share anyway...

If anyone has managed to have success in understanding the issue & getting Vodefone to fix it I'd appreciate the help! I have telegraf running on a server and one of the things it's monitoring is ping. I keep 6 months of data, so can share exact timings around the problem. All of the data here is using a wired connection.

I have Gigafast 900 and live in Newport Pagnell. I also have a static IP in case it matters.

Here is my ping to Google (yellow) & Cloudflare (green) graphed over the last 90 days: 

My connection dropped at ~00:17:40 on the 14th of October and came back 2 minutes later with latency doubled (was 10-12ms, now 20-25ms), clearly routing has changed: 

Since then there has been one occurrence of it returning to normal (19th Oct midnight-~4:30) but it has otherwise been consistently worse. It has also been less stable, with evenings seeing large spikes: 

Immediately after the change, each evening also saw significant packet loss, to the point where TV streaming was regularly buffering:

Packet loss in the evenings has improved but otherwise this seems to be persistant. Download speeds are also lower in the evenings (571mbps now at 6pm), with upload speeds still around 900mbps.

Here's a traceroute to Google at the time of writing:

Tracing route to dns.google [8.8.8.8]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  vodafone.broadband [192.168.1.1]
  2    13 ms    13 ms    13 ms  90.247.128.1
  3    23 ms    22 ms    22 ms  63.130.105.134
  4     *        *        *     Request timed out.
  5    26 ms    26 ms    26 ms  216.239.42.41
  6    25 ms    27 ms    26 ms  142.250.215.127
  7    25 ms    25 ms    25 ms  dns.google [8.8.8.8]

This is frustrating, the difference in service is noticable both in the data and also just as a person browing the web. I suspect the answer will be that Vodafone are routing me via somewhere far away and it's oversubscribed so can't keep up in the evenings, but it would be nice to get this fixed... When I first bought gigafast I had a consistent ping of 4-5ms so it feels like performance keeps degrading.

[Kumar123]

Why your internet slows down at night. As mentioned above, the primary reason your internet may get slower at night is network congestion. You can think of this phenomenon like this: The network for your local area is a lot like that which serves your house. There's only so much bandwidth to go around.