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[boost]

6ms is impressive. The lowest I've seen so far.

Shame your ISP doubles it!

What length do you reckon your copper tail is? What's attenuation reported as?

That isn't the ISP doubling it.   Hop 4 will be at the bRAS location and before any core routing. Liverpool doesnt have a core node, so most likely that will be somewhere like Manchester.   As mentioned in my earlier post 6-7ms is typical to bRAS, its also not unusual to see several hops at the bRAS before it enters the core.

Hop 9 is exiting the core at Ealing. 

Most BTw based ISPs except BTretail use L2TP tunnelling so that you never see any of the BTwholesale routing.  Many years ago I did some trials for Plusnet's RIN network where they didnt use L2TP and I could see clearly from that I went through Manchester.   There used to be another way you could view your routing, but Im not sure if it works on 21CN - I havent tried it. 


I find hop 5 quite interesting though and how things increase by 3ms - yet both hop4 and hop5 resolve to T-MAN (Metropolitan Access Node) but Ive no idea what a T-MAN is - searching throws up something to do with clusters & IPv6 and yet when I look at the next hop after it resolves to BT-UKIP-IPV4.   If someone has more info on that please do enlighten   Im not sure if those particular routers in that cluster could even have low priority to ICMP as note how hop 8 has lower latency, which is typical of prioritising ICMP.

If the access technology yields 6ms, everything thereafter (excluding the native fibre propagation delay, 1ms?) is simply inefficiency.

6ms to 13ms is sloppy design/aged hardware/misconfiguration.

The end

[kitz]

If you want to upload your stats to MDWS then you'll need something like the HG612.

A caveat for N0STIE.    The prices of the HG612 have become silly money recently on Ebay.   Before you purchase please read this thread and avoid certain sellers who are charging extortionate prices.   It may be far more economical to purchase a decent combined unit.
If you want help on this please do ask. 

[kitz]

I'd rather they gave low priority to ICMP rather than dropping UDP, which some of them seem to be doing. Since switching to Infinity I've noticed that NTP has become less reliable. Using tshark I can see that many requests just don't get a reply at peak times. Early in the morning, every request receives a reply.

I totally agree, and I suspect that is what they are doing for those routers reporting 8-9 ms.   It makes the network more efficient by prioritising.

[kitz]

If the access technology yields 6ms, everything thereafter (excluding the native fibre propagation delay, 1ms?) is simply inefficiency.

6ms to 13ms is sloppy design/aged hardware/misconfiguration.

The end

But its not that.    6ms is only the time taken to the bRAS - ie Manchester.  The additional 6ms on top of that bringing it up to 12ms is all the way to London.

When you break that tracert down to its most simplistic form it interprets as

6ms -  EU Premises <-> RAS - Enter the CORE Network at Manchester
12ms - EU Premises <-> London - Exit the CORE at Ealing London.
13ms - EU Premises <-> BBC - extra 1ms to get from Core exit point to the BBC server.

[N0STIE]

A caveat for N0STIE.    The prices of the HG612 have become silly money recently on Ebay.   Before you purchase please read this thread and avoid certain sellers who are charging extortionate prices.   It may be far more economical to purchase a decent combined unit.
If you want help on this please do ask.

Thanks kitz for this link, very useful! Just purchased one HG612 3B for £25.00 unfortunately locked one. I hope this is not that complicated to unlock it. Which firmware should I use to get the best out of it?

[burakkucat]

. . . Just purchased one HG612 3B for £25.00 unfortunately locked one. I hope this is not that complicated to unlock it. Which firmware should I use to get the best out of it?

Please have a read of the initial posting of this thread and take note of the added information coloured red. You should also download a copy of Asbokid's unlocking guide, make a hard-copy print out and carefully read it before attempting to unlock your HG612.

[N0STIE]

Hey bruakkucat,

I will read it carefully before unlocking! Do you suggest turning off BT Agent and how to do it?

[burakkucat]

Do you suggest turning off BT Agent and how to do it?

I don't recommend it but if you really want to do so, the simplest method is to remove the "channel" by which it communicates with Beattie Bellman's HQ.    Once you have the HG612 unlocked, just ask and one of us will explain what change should be made to the configuration.

[N0STIE]

Yes I definietely will. Thanks for help and explanation burakkucat! I will post back in a few days once I get my modem and unlock it.

[boost]

If the access technology yields 6ms, everything thereafter (excluding the native fibre propagation delay, 1ms?) is simply inefficiency.

6ms to 13ms is sloppy design/aged hardware/misconfiguration.

The end

But its not that.    6ms is only the time taken to the bRAS - ie Manchester.  The additional 6ms on top of that bringing it up to 12ms is all the way to London.

When you break that tracert down to its most simplistic form it interprets as

6ms -  EU Premises <-> RAS - Enter the CORE Network at Manchester
12ms - EU Premises <-> London - Exit the CORE at Ealing London.
13ms - EU Premises <-> BBC - extra 1ms to get from Core exit point to the BBC server.

This is where my complete inability to do anything maths related fails me

[michty_me]

I would love to see fastpath at some point. Unfortunately I have never seen it on VDSL. I had VDSL with Zen on my last property and was always interleaved even though the BT engineer stated I had a very good clean line along with full sync.

Now in my new property, I believe the line may be noisier but still not too bad a sync at 75/20. No sign of fastpath here either. Best pings I get are 25ms to bbc from NE Scotland.

[boost]

What ISP/modem?

[michty_me]

I'm still with Zen and using the HG612. I did use a Netgear D6400 for 8days. Currently back in the HG612.

[boost]

I've no idea if it would help or hinder in general but have you looked at the maxDataRate command for the HG612?

You could potentially lower your synch which may allow for a more favourable latency profile?

[michty_me]

I've never even heard if the Max data rate command to be honest.