In reply to a post by Glovepup:

As I am using a supplied modem which I do not have access too, I am unable to see the sync speeds of the line like I could when on FTTC previously. I have searched the internet on this, unless I buy my own capable g.fast router I do not believe I will have access to this info?

As I said, there's also https://www.dslchecker.bt.com/. Unfortunately, because you're on a TalkTalk line, it probably won't accept your phone number (non-BT). You could try the address checker but I don't think that shows observed speeds.

Therefore, you probably have to take Talktalk's word for it that you are getting a 350M sync speed, unless you buy/borrow another G.fast modem.

Do you have a two-box setup: an Openreach supplied G.fast modem, plus a Talktalk-supplied router?

In reply to a post by Glovepup:

2. I have been using my macbook pro (2018) with a USB-C to ethernet adapter

That's helpful.

Try opening Activity Monitor, then right-click the dock icon and select "Dock Icon > Show CPU History", and see what it does during a speedtest. Note: if you have a dual-CPU machine then you'll likely see four graphs due to hyperthreading. If any two of them go to 100%, then you're CPU-bound.

Also: which USB-C ethernet adapter do you have? Depending on the model, it might be:

* A Thunderbolt to ethernet adapter (best)
* A USB 3.0 or 3.1 ethernet adapter (probably fine)
* A USB 2 ethernet adapter (will limit throughput)

The fact that it's physically a USB-C connector alone doesn't tell you which of these it is.

Just trying with two or three other devices - e.g. desktop PCs, other laptops - can be helpful. If they all flatline at the same throughput then it's unlikely that they are the limiting factor. That would leave your router, the line, and Talktalk's network.

In reply to a post by Glovepup:

3. Led to believe it's capable of reaching such speeds.

If it's a two-box setup then in principle you ought to be able to plug your laptop directly into the modem and configure a PPPoE session. I've done this with VDSL, but not G.fast.

macOS supports it.

You may need to find out your PPPoE username and password to use - ideally extracted from your router's configuration.

I know that some of Talktalk's LLU lines ignore username/password for authentication, using the physical line location instead to authenticate, but don't know about their Openreach footprint. It *might* work with a random username/password. Depends how much you want to experiment

In reply to a post by Glovepup:

Test completed, 300mb!

So it looks like the TT router is limiting your speed - have you checked for any NAT acceleration options (sometimes called CTF) - also make sure you don't have any QoS settings enabled. The router cpu may not be fast enough to handle NAT at your G.fast speeds. Perhaps ask on the TT forums if someone with your router gets the full speed?

You could look at replacing the router with a third party model if you want the full download speed.

Could we worth checking your MTU settings on the TT router. If it negotiates a low MTU during PPP stage, that will limit your throughput too, especially if you are also hitting a CPU (packet per second) limit on the router.

In reply to a post by brookheather:

In reply to a post by Glovepup:

Test completed, 300mb!

So it looks like the TT router is limiting your speed - have you checked for any NAT acceleration options (sometimes called CTF) - also make sure you don't have any QoS settings enabled. The router cpu may not be fast enough to handle NAT at your G.fast speeds. Perhaps ask on the TT forums if someone with your router gets the full speed?

You could look at replacing the router with a third party model if you want the full download speed.

Unfortunately there are not any options to change on the Wifi Hub... think another router might be the best option here.

In reply to a post by chrisdev:

Could we worth checking your MTU settings on the TT router. If it negotiates a low MTU during PPP stage, that will limit your throughput too, especially if you are also hitting a CPU (packet per second) limit on the router.

No MTU setting on it, it's rather simple the Wifi Hub.

In reply to a post by candlerb:

In reply to a post by Glovepup:

As I am using a supplied modem which I do not have access too, I am unable to see the sync speeds of the line like I could when on FTTC previously. I have searched the internet on this, unless I buy my own capable g.fast router I do not believe I will have access to this info?

As I said, there's also https://www.dslchecker.bt.com/. Unfortunately, because you're on a TalkTalk line, it probably won't accept your phone number (non-BT). You could try the address checker but I don't think that shows observed speeds.

Therefore, you probably have to take Talktalk's word for it that you are getting a 350M sync speed, unless you buy/borrow another G.fast modem.

Do you have a two-box setup: an Openreach supplied G.fast modem, plus a Talktalk-supplied router?

In reply to a post by Glovepup:

2. I have been using my macbook pro (2018) with a USB-C to ethernet adapter

That's helpful.

Try opening Activity Monitor, then right-click the dock icon and select "Dock Icon > Show CPU History", and see what it does during a speedtest. Note: if you have a dual-CPU machine then you'll likely see four graphs due to hyperthreading. If any two of them go to 100%, then you're CPU-bound.

Also: which USB-C ethernet adapter do you have? Depending on the model, it might be:

* A Thunderbolt to ethernet adapter (best)
* A USB 3.0 or 3.1 ethernet adapter (probably fine)
* A USB 2 ethernet adapter (will limit throughput)

The fact that it's physically a USB-C connector alone doesn't tell you which of these it is.

Just trying with two or three other devices - e.g. desktop PCs, other laptops - can be helpful. If they all flatline at the same throughput then it's unlikely that they are the limiting factor. That would leave your router, the line, and Talktalk's network.

In reply to a post by Glovepup:

3. Led to believe it's capable of reaching such speeds.

If it's a two-box setup then in principle you ought to be able to plug your laptop directly into the modem and configure a PPPoE session. I've done this with VDSL, but not G.fast.

macOS supports it.

You may need to find out your PPPoE username and password to use - ideally extracted from your router's configuration.

I know that some of Talktalk's LLU lines ignore username/password for authentication, using the physical line location instead to authenticate, but don't know about their Openreach footprint. It *might* work with a random username/password. Depends how much you want to experiment

Wanted to say thanks for your detailed reply, turns out it is the TalkTalk Wifi hub. Connecting directly to the modem improves the speed.

Edited by deleted (Wed 30-Oct-19 20:52:42)

Excellent, just a shame that Talktalk don't supply a router that's up to the job!

Out of interest, how did you get your PPPoE username/password? Did you pick them yourself at ordering time, or does TalkTalk provide them, or did it work with arbitrary values?

In reply to a post by candlerb:

Excellent, just a shame that Talktalk don't supply a router that's up to the job!

Out of interest, how did you get your PPPoE username/password? Did you pick them yourself at ordering time, or does TalkTalk provide them, or did it work with arbitrary values?

It just worked using DHCP on the lan config.

In reply to a post by candlerb:

Excellent, just a shame that Talktalk don't supply a router that's up to the job!

Out of interest, how did you get your PPPoE username/password? Did you pick them yourself at ordering time, or does TalkTalk provide them, or did it work with arbitrary values?

Talktalk residential don't use PPP.

It's IPoE (DCHP) and it will assign an IP to ANY router connected to your landline.