Different Speeds On Different Machines - WHY? (Gigafast)

[JSteve303]

Can anyone help me with this topic? 

I had Gigafast 500 package connected in my home about a month ago - I was using the Vodafone supplied router and over this week swapped it out for a Linksys Velop 3 Node Mesh System. Regardless of the router used, I'm getting totally varied results on my different devices throughout my home. In my kitchen I have an iMac 27", a windows 10 gaming machine and a new Macbook Pro 13" M1. The Macbook is wireless, the iMac & Windows Machine are on ethernet to a node and my wife is also connected with a laptop to a node in an office. 

We can speed-check and get 200mbs, 2 mins later its 457mbs, then on a different machine only get 3mbs, 4mbs max.... The consistancy within 1 property across different devices is just doing my head in.... A TV in the living room is so bad at streaming, you would think we were trying to watch 4K from the 1990's AOL CD.... 

Nothing is solid, certainly not for any length of time in a day, it's so frustrating. Only the gaming windows machine seems to hold a solid connection, everything else including mobiles are all over the place... why is this happening?

We had Plusnet 50mb and it was solid, all day, all night... Now we are either from the future at closer to 500mbps or dial up... 

Help please....  

***extra info - for some reason I have just noticed that one machine when doing the speedtest is connecting to Vodafone UK - while other machines are connected to BT - they have different IP addresses - what's causing this ?*** Is it anything to do with the fact that I have changed the network name to replicate my old name, I did this so all devices could re-connect when I moved from Plusnet (BT) to Vodafone, are they holding onto the BT info?

[clint_flick]

Hi

I would check the values as best you can...

2.4 ghz devices, 5.0 ghz devices and ethernet.

Then the IP address, Default Gateway, and DHCP and DNS numbers.

Wireless LAN adapter WiFi:

Connection-specific DNS Suffix . : broadband
Description . . . . . . . . . . . : Realtek RTL8723BE 802.11 bgn Wi-Fi Adapter
Physical Address. . . . . . . . . : 
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . :
IPv4 Address. . . . . . . . . . . : 192.168.1.77(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 12 December 2020 10:58:48
Lease Expires . . . . . . . . . . : 18 January 2157 17:58:34
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1

Even walk around the property with a smartphone and an analyser if you can.

You certainly have an anomaly from the description you posted.

If in doubt please ask.

[JSteve303]

I’ve solved it... what an effort it was but I had a network Linksys power line plug which I was using to hook up my sky box. So one in the kitchen and one in the office.... this was actually pulling the entire network down randomly whenever data was going from the web to the sky box for on-demand services like iPlayer to tv show downloads. I turned the 2 Linksys plugs off and boom.... everything in the house jumped to 300-500mbs

cant believe it was this causing the issue, basically the slowest connection on the network was killing everything else.... 

Im so happy to have fixed this - but damn it took some time to figure out and was crazy frustrating 

[clint_flick]

Magic.