2Gb FTTP Broadband Slower Than BT VDSL?

I've recently switched to a 2Gb symmetrical FTTP broadband connection from a provider called ZZOOMM, the speeds are very good as you can see below, although I note on TBB speed checker the upload is always low, must be a 1Gb connection on TBB's side? Anyway, since switching web pages seem to load very slow, and Netflix and streaming services seem to buffer or go to low quality mode, this is despite me getting claimed speeds in excess of 2Gb/s on Netflix's fast.com.. Can anybody give me any pointers? Latency seems fine as well everything seems fine but real world responsiveness on the web is poor?

The upload limit almost certainly isn't anything to do with TBB: they will have a proper symmetrical connection in a data centre. It could be your client device; or it could be Zzoomm's network not being as symmetrical as they claim. Filling 2Gbps on a consumer device (especially Windows) can be difficult.

DNS problems can cause general poor browsing experience. But that would not cause streaming services to buffer or switch to lower bitrates.

Do all client devices behave the same? For example, streaming to a PC versus streaming to a TV with a Roku / Firestick or similar?

Does Zzoomm supply the router, and are you connecting all devices into it, or do you have some sort of LAN of your own? The problem may be in your LAN. Look for broadcast storms with wireshark; check spanning tree is running and preventing loops. Try turning off any wifi extenders you have and running everything *directly* into the router.

Also configure BQM if you can, then see if you see any pattern of packet loss to the router from the outside.

In reply to a post by lewisp8:

must be a 1Gb connection on TBB's side?

Or a provider between Zzzoom and ThinkBroadband's network having a limit on traffic per user from Zzzoom. (perhaps down to how much Zzzoom pay).

Thanks for the reply,

The router supplied is Zyxcel 10Gb router connected to the ONT via 10GbE Cat 6 cable which is plugged in to a 10Gb ethernet adapter in to a Mac, I've connected the ONT directly to the PC and still has the same behaviour. In regards to the upload every other speed test including iperf seems to show nearly band on 2Gb up and down across a veriety of servers hence my suspicion of it being on the TBB side.

Streaming on other devices has the same result, oddly if you manually set bit rate / quality to highest setting its fine with no buffering.

I'll have a play about with DNS settings

In reply to a post by lewisp8:

. In regards to the upload every other speed test including iperf seems to show nearly band on 2Gb up and down across a veriety of servers hence my suspicion of it being on the TBB side.

There are thousands of interconneted networks on the "inter" net.

maybe @seb will see this and comment.

Maybe best to have a word with Zzoomm, but looking sat their facebook page they do seem to be having a lot of problems, some is to do with their router, but since you are on 2Gb/s you get a Zyxel which should be better. The other thing is maybe TBB checker can't cope, try another one.

With all the hype that Zzoomm is putting out, they should be amazing. I have had another letter from them advertising their broadband, must be the 6th in less than 4 weeks.

Does your public IP address reported on speedtest sites match what your router thinks your external IP is?

In reply to a post by jchamier:

In reply to a post by lewisp8:

must be a 1Gb connection on TBB's side?

Or a provider between Zzzoom and ThinkBroadband's network having a limit on traffic per user from Zzzoom. (perhaps down to how much Zzzoom pay).

That isn't a thing.

I would also be querying the single stream speed.

Best to check single thread perf. with another machine (or two) could be processor (or software) bound by the machine running the test.