BT Infinity & FTTx Discussion

ChrisD. · 8 Dec 2020 at 11:15

robj20 said:
Shame you can't change the DNS settings though.

Can you change the DNS server address for DHCP addresses it hands out?

Gimped ISP routers frustrate me massively.

robj20 · 8 Dec 2020 at 11:30

ChrisD. said:
Can you change the DNS server address for DHCP addresses it hands out?

Gimped ISP routers frustrate me massively.

No there are no DNS settings at all.
Soon as I have the spare money in getting an Edgerouter 4.

digitalwolf · 8 Dec 2020 at 12:13

Is anyone using their own router with Sky FTTP?

Is it an easy process? My Asus supports DHCP Option 61.

Silly Goose On The Loose · 8 Dec 2020 at 13:51

Caged said:
The Business version of the hub (no v2 yet unfortunately) has more options - you can set the DNS servers and add static routes. Not bad for the ~£20 they can be bought for.

Apparently it works in bridge mode as well.

Ev0 · 8 Dec 2020 at 23:32

I’m still using the Smart Hub 2 and whilst there’s a couple of niggly things you can’t do it’s been fine.

Did end up disabling dhcp and using the pi-hole for that as couldn’t set the pi-hole as the dns server on the hub..

Avalon · 9 Dec 2020 at 11:27

digitalwolf said:
Is anyone using their own router with Sky FTTP?

Is it an easy process? My Asus supports DHCP Option 61.

FTTP shouldn’t be any different to g.fast or FTTC unless they have gone VLAN, you just need to put in random details in the correct format, obviously Merlin supports 60/61, not sure if the stock fw does.

Silly Goose On The Loose · 9 Dec 2020 at 17:14

Am I missing something or does the FTTP ONT from Openreach only have 1 Gb LAN, how can they ever offer a faster service without needing to replace it.

the-evaluator · 9 Dec 2020 at 17:26

No, you're not missing something. When XG-PON arrives you'll need a new ONT.

robj20 · 9 Dec 2020 at 17:29

Surely it's going to be a while before we need to worry about faster than 1Gb.

Ayahuasca · 9 Dec 2020 at 17:36

robj20 said:
Surely it's going to be a while before we need to worry about faster than 1Gb.

It will be, I know Virgin are trialling 2.2Gbps atm but that’s a different network.

I think the leap might be astronomical from some providers when it does come. I can see some of the independent ISPs going straight to 10Gbps.

Silly Goose On The Loose · 9 Dec 2020 at 17:37

But right now you can't get the full speed on FTTP right? 1 Gb with overheads is less than the speed Openreach provide?

Avalon · 9 Dec 2020 at 17:39

Gigabit said:
But right now you can't get the full speed on FTTP right? 1 Gb with overheads is less than the speed Openreach provide?

Openreach offer 900Mbit iirc.

HungryHippos · 9 Dec 2020 at 17:39

I think i'd be happy on 1gbps for a while yet really. It's overkill so no need to go above right now.

Getting symmetric upload would be great though.

Silly Goose On The Loose · 9 Dec 2020 at 18:04

Avalon said:
Openreach offer 900Mbit iirc.

I'm curious now, is that provisioned at 900Mb or is it 1Gb but they say 900Mb to account for overheads/advertising reasons?

robj20 · 9 Dec 2020 at 18:31

Gigabit said:
I'm curious now, is that provisioned at 900Mb or is it 1Gb but they say 900Mb to account for overheads/advertising reasons?

What do you mean overheads?
It's not like FTTC I pay for 150 and get exactly that for instance, none of this up to rubbish.
I think the slowest speed test I've done I got 148Mb.

Caged · 9 Dec 2020 at 19:06

The Openreach product is 1000Mbps, ISPs will advertise a figure based on what a percentage of their user base are able to obtain. If the connection is capped at 1000Mbps then that's never going to be the average, so 900Mbps (sometimes 940Mbps) is what it gets advertised as.

Silly Goose On The Loose · 9 Dec 2020 at 22:02

robj20 said:
What do you mean overheads?
It's not like FTTC I pay for 150 and get exactly that for instance, none of this up to rubbish.
I think the slowest speed test I've done I got 148Mb.

PPPoE has overheads for a start, you won't get exactly 1Gb.

Silly Goose On The Loose · 9 Dec 2020 at 22:03

Caged said:
The Openreach product is 1000Mbps, ISPs will advertise a figure based on what a percentage of their user base are able to obtain. If the connection is capped at 1000Mbps then that's never going to be the average, so 900Mbps (sometimes 940Mbps) is what it gets advertised as.

Max you can achieve is therefore around 940Mbps because of overheads, e.g. PPPoE.

So 900Mbps makes sense, I see now, thanks.

Silly Goose On The Loose · 10 Dec 2020 at 16:23

I've for a while had an issue with BT Broadband whereby I get terrible ping spikes when I'm torrenting.

Initially I believed this to be a bufferbloat issue so I employed SQM through OpenWrt but although this has reduced the ping spikes from 100s of ms to say up to 50ms, I'm still seeing the problem.

I've had a chat with some people on the OpenWrt forum and SQM should really stop these issues, so they concluded it's likely congestion.

My own tests seem to confirm this, if I cap my download speed to below 20Mb, the issue seems to go away. This is no good as that's more than half of my bandwidth but it does seem to indicate the issue is congestion.

Is there anything I can do about this, or is the solution to change ISP?

digitalwolf · 11 Dec 2020 at 10:15

Gigabit said:
PPPoE has overheads for a start, you won't get exactly 1Gb.

And you're unlikely to get 900Mbps unless you run Cat6 everywhere or spend a fortune on a decent AX router.

Really don't think BT are concerned about the ONT only supporting 1Gb. Takeup on the FTTP 900 package is low compared to FTTP 150. Money talks.

BT Infinity & FTTx Discussion

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