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G.Fast Profile

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Shonk10
Conversation Starter

I had G.fast 160/30 Installed 12 days ago (9th)

 

all has been working well

 

My Attainable is 400 down 62 up

 

at midnight last night dlm forced a resync with 8ms of interleaving

 

I suspect a smart plug that i turned off and on a few times yesterday (very close to the g.fast modem) caused a bit of burst impulse noise

 

I have never had Interleaving on my line ever

 

2009-2013 24mbit sync with ADSL2 Fastpath

2013-2019 80Mbit Sync with VDSL2 Fastpath

not a single dlm event

 

i have zero interest in any interleaving and my line certainly doesnt need it

 

i had 11crc's in 27months on my VDSL2 and my G.fast line is even cleaner

 

at a guess i would say you have my line on the

 

NGA Profile (G.fast) Stable or Standard

Please can you put a request to get it switched to Speed with Openreach

a dlm reset would also be nice

 

G.Fast1.jpg

 

 

Shonk10
Conversation Starter

on looking into this some more

 

  • ISP's known to use NGA Speed Profile: AAISP, BT, Plusnet, Zen.
  • ISP's known to use NGA Standard Profile: EE, Sky, TalkTalk, Vodafone.

Its just a simple case of talktalk requesting Openreach put my Line dlm on NGA Profile (G.fast) Speed

Community Team

Hi Shonk10,

 

If your connection remains stable with a low error count then DLM should switch off interleaving automatically


Chris

Shonk10
Conversation Starter

It turned out it wasnt an interleaving problem i found this out almost straight after making this post talktalk altered the routing for my connection and sent me off into the middle of wales resulting in a 233% latency jump (6ms to 14ms) for any uk based ip and tbh i was only expecting it to be a temp routing failure that would get resolved within a few days

 

but this has been going on for 2 months now im an online gamer and this has resulted in the worst latency i have ever had in games

 

please can you get this looked into
i think i have been more than patient waiting for it to get resolved by talktalk's routing system

 


Traceroute to my default gateway today 13-07-19 as can be seen by the 2ms latency
its not down to interleaving its down to bad routing

 

Tracing route to host-92-21-176-1.as13285.net [92.21.176.1]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms host-92-21-176-1.as13285.net [92.21.176.1]

Trace complete.


Traceroute to the talktalk dns server today 13-07-19 (this is an anycast dns address with a node very close to the default gateway)

 

Tracing route to public-dns-a.as9105.net [79.79.79.79]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms public-dns-a.as9105.net [79.79.79.79]

 

Traceroute the first 11 Days 05-19 into london internet exchange


Tracing route to host-78-144-14-122.as13285.net [78.144.14.122]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms host-78-151-230-231.as13285.net [78.151.230.231]
3 2 ms 2 ms 2 ms host-78-151-230-236.as13285.net [78.151.230.236]
4 6 ms 6 ms 6 ms host-78-144-9-253.as13285.net [78.144.9.253]
5 6 ms 6 ms 6 ms host-78-144-0-69.as13285.net [78.144.0.69]
6 6 ms 6 ms 6 ms host-78-144-14-122.as13285.net [78.144.14.122]

 


Traceroute into london internet exchange today 13-07-19

 

Tracing route to host-78-144-14-122.as13285.net [78.144.14.122]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 7 ms 6 ms 6 ms host-78-151-229-229.as13285.net [78.151.229.229]
3 6 ms 6 ms 6 ms host-78-151-229-228.as13285.net [78.151.229.228]
4 13 ms 13 ms 14 ms host-78-144-9-199.as13285.net [78.144.9.199]
5 13 ms 13 ms 13 ms host-78-144-14-63.as13285.net [78.144.14.63]
6 14 ms 14 ms 14 ms host-78-144-14-122.as13285.net [78.144.14.122]

 

Traceroute to default gateway and talktalk's dns server 13-07-19

Route.png

Shonk10
Conversation Starter
i just did a lenghy reply here and its been marked as spam by the auto system
plz unspam it
Shonk10
Conversation Starter

Trying to reply again but im sure it will be marked as spam again

 

It turned out it wasnt an interleaving problem i found this out almost straight after making this post talktalk altered the routing for my connection and sent me off into the middle of wales resulting in a 233% latency jump (6ms to 14ms) for any uk based ip and tbh i was only expecting it to be a temp routing failure that would get resolved within a few days

 

but this has been going on for 2 months now im an online gamer and this has resulted in the worst latency i have ever had in games

 

please can you get this looked into
i think i have been more than patient waiting for it to get resolved by talktalk's routing system

 


Traceroute to my default gateway today 13-07-19 as can be seen by the 2ms latency
its not down to interleaving its down to bad routing

 

Tracing route to host-92-21-176-1.as13285.net [92.21.176.1]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms host-92-21-176-1.as13285.net [92.21.176.1]

Trace complete.


Traceroute to the talktalk dns server today 13-07-19 (this is an anycast dns address with a node very close to the default gateway)

 

Tracing route to public-dns-a.as9105.net [79.79.79.79]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms public-dns-a.as9105.net [79.79.79.79]

 

Traceroute the first 11 Days 05-19 into london internet exchange


Tracing route to host-78-144-14-122.as13285.net [78.144.14.122]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 2 ms 2 ms 2 ms host-78-151-230-231.as13285.net [78.151.230.231]
3 2 ms 2 ms 2 ms host-78-151-230-236.as13285.net [78.151.230.236]
4 6 ms 6 ms 6 ms host-78-144-9-253.as13285.net [78.144.9.253]
5 6 ms 6 ms 6 ms host-78-144-0-69.as13285.net [78.144.0.69]
6 6 ms 6 ms 6 ms host-78-144-14-122.as13285.net [78.144.14.122]

 


Traceroute into london internet exchange today 13-07-19

 

Tracing route to host-78-144-14-122.as13285.net [78.144.14.122]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms aurora.shonk.org [192.168.0.1]
2 7 ms 6 ms 6 ms host-78-151-229-229.as13285.net [78.151.229.229]
3 6 ms 6 ms 6 ms host-78-151-229-228.as13285.net [78.151.229.228]
4 13 ms 13 ms 14 ms host-78-144-9-199.as13285.net [78.144.9.199]
5 13 ms 13 ms 13 ms host-78-144-14-63.as13285.net [78.144.14.63]
6 14 ms 14 ms 14 ms host-78-144-14-122.as13285.net [78.144.14.122]

 

Traceroute to default gateway and talktalk's dns server 13-07-19

Route.png

Shonk10
Conversation Starter

I have done a visual representation for you

 

Red = Old optimal route

Blue = Current bad route

 

the jump off into carmarthenshire results in 4ms extra latency to get to carmarthenshire

then 4ms to get back ontrack

 

hence the jump from 6ms to 14ms

 

Route2a.png

Community Team

Hi Shonk10,

 

Are you experiencing any actual problem with your service? 


Chris

 

 

Shonk10
Conversation Starter

Yes my latency is 230% of what it should be

 

 

Shonk10
Conversation Starter

This also affects real world throughput
with a default TCP window size and 6ms of RTT i can download 87.38 Mbit a second
with a default TCP window side and 14ms of RTT i can download 37.45 Mbit a second


hence it not only destroys my online gaming latency
it actually affects my throughput


Bandwidth-delay Product and buffer size
BDP (160 Mbit/sec, 6.0 ms) = 0.12 MByte
required tcp buffer to reach 160 Mbps with RTT of 6.0 ms >= 117.2 KByte
maximum throughput with a TCP window of 64 KByte and RTT of 6.0 ms <= 87.38 Mbit/sec.

 

Bandwidth-delay Product and buffer size
BDP (160 Mbit/sec, 14.0 ms) = 0.28 MByte
required tcp buffer to reach 160 Mbps with RTT of 14.0 ms >= 273.4 KByte
maximum throughput with a TCP window of 64 KByte and RTT of 14.0 ms <= 37.45 Mbit/sec.

Community Team

Hi Shonk10,

 

Can you run 3 speed tests at different times of day on the My Account speed checker on a device connected by Ethernet cable to your router (can you try to make sure that no other devices/applications accessing the internet at the time)

 

Can you also run a set of pings and a set of traceroutes to www.google.co.uk and post the results

 

https://help2.talktalk.co.uk/how-do-i-perform-ping-or-traceroute 

 

Thanks
Chris

Shonk10
Conversation Starter

I have shown you far more accurate than a traceroute to google in dublin ireland

i have shown you a traceroute to linx london (the primary peer point for the whole of the uk with everyone else) solely on talktalks internal network and pointed out exactly what the problem is

and why its a problem

 

Im beeing routed to a talktalk pop (point of presence) in totally the wrong direction and a total latency nightmare

 

talktalk have pop's in cardiff and newport i should be on the cardiff pop for traffic routing

and at worst in overloaded periods newport

 

not some backwater pop in the middle of wales 8ms away

 

i request you pass this up for resolution

there is zero need to do speed tests for you

 

Community Team

Hi Shonk10,

 

I've raised this to our network team, can you bump the thread tomorrow and we'll check for updates


Chris

Shonk10
Conversation Starter

thanks

Community Team
Shonk10
Conversation Starter

bump

Community Team

Hi

 

I've mailed our network teams for an update.  We will post back as soon as we get a reply.

 

Thanks

 

Karl. 

Community Team

Hi

 

Our network teams are saying there are no issues identified with the routing on your circuit.  Are you still experiencing issues with your connection.

 

Thanks

 

Karl. 

Shonk10
Conversation Starter

yes

Community Team

Hi

 

I've passed this back over to networks to query the routing path.

 

Thanks

 

Karl.