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Grewks94
Beginner
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Message 1 of 11

BT Infrastructure the reason for poor latency in online games?

I've noticed when using traceroute to multiple different game servers, BT takes a very long time before it leaves its own network.


2* Unknown Host * 0.0.0.0 2 0ms
3* Unknown Host * 31.55.187.181 3 14ms
4* Unknown Host * 31.55.187.180 4 13ms
5core2-hu0-17-0-5.southbank.ukcore195.99.127.190 5 14ms
6peer2-et0-1-5.slough.ukcore.bt.ne62.172.103.210 6 13ms

 

Pretty much every single traceroute I make to a London based game server takes this over the top route to leave the BT network.

 

Whilst a buddy who lives 3 doors away, on Sky fibre, takes just two hops to get to the exact same position.

2  97e7fef2.skybroadband.com 151.231.254.242] 5ms
3  be259.pr2.hobir.isp.sky.com 89.200.131.2] 10ms

 

 

The route thereafter is the exact same.

 

I'm sure some will point out that the latency times are 'fine'.....

But that isn't the case for strict latency affected applications such as gaming.

 

I'm guessing there is no other way to decrease my latency than change ISP to Sky?

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10 REPLIES 10
Sage
Sage
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Message 2 of 11

Re: BT Infrastructure the reason for poor latency in online games?

Except that just taking part of a tracert without the full result proves nothing.

Grewks94
Beginner
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Message 3 of 11

Re: BT Infrastructure the reason for poor latency in online games?

"The route thereafter is the exact same".

I have posted part of the tracert, because this is the part with the problem.
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Grewks94
Beginner
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Message 4 of 11

Re: BT Infrastructure the reason for poor latency in online games?

Here's the full tracerts for both.

A sky user, twice the distance from the server than me, both pings in significantly less hops, and with a significantly lower latency.

BT Tracert

1 10.0.0.1 1 1ms
2 * Unknown Host * 0.0.0.0 2 0ms
3 * Unknown Host * 31.55.187.181 3 14ms
4 * Unknown Host * 31.55.187.180 4 13ms
5 core2-hu0-17-0-5.southbank.ukcore195.99.127.190 5 14ms
6 peer2-et0-1-5.slough.ukcore.bt.ne62.172.103.210 6 13ms
7 * Unknown Host * 195.66.224.116 7 14ms
8 * Unknown Host * 0.0.0.0 8 0ms
9 * Unknown Host * 134.213.97.149 9 16ms
10 corea-core6.lon3.rackspace.net 164.177.137.13 10 16ms
11 core6-eaaggr1a.lon3.rackspace.net31.222.133.213 11 17ms
12 * Unknown Host * 134.213.37.197 12 14ms

 

Sky Tracert

1 <1 ms 192.168.1.1
2 5 ms 97e7fef2.skybroadband.com [151.231.254.242]
3 10 ms be259.pr2.hobir.isp.sky.com [89.200.131.2]
4 10 ms rackspace-ip81-27.no-dns-yet.lonap.net [5.57.81.27]
5 * * * Request timed out.
6 13 ms 134.213.97.153
7 14 ms coreb-core6.lon3.rackspace.net [164.177.137.25]
8 12 ms area101.core2-core1.lon.rackspace.net [31.222.133.227]
9 12 ms 134.213.37.197

 

It seems extremely odd to me that BT are essentially sending me through two almost identical destinations, twice.

3 * Unknown Host * 31.55.187.181 3 14ms
4 * Unknown Host * 31.55.187.180 4 13ms
5 core2-hu0-17-0-5.southbank.ukcore195.99.127.190 5 14ms
6 peer2-et0-1-5.slough.ukcore.bt.ne62.172.103.210 6 13ms

Whereas Sky do the same in half the hops

2 5 ms 5 ms 5 ms 97e7fef2.skybroadband.com [151.231.254.242]
3 11 ms 9 ms 10 ms be259.pr2.hobir.isp.sky.com [89.200.131.2]

 

 

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Grewks94
Beginner
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Message 5 of 11

Re: BT Infrastructure the reason for poor latency in online games?

I'm guessing there is no way to reduce these hops on the internal BT network?
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Grewks94
Beginner
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Message 6 of 11

Re: BT Infrastructure the reason for poor latency in online games?

After using a traceroute to a server which is this time outside of the UK, the comparisons are clear.

 

The routing seems to want to kind of 'double up' which just makes zero sense.

 

* Unknown Host * 31.55.187.177 3 11ms
* Unknown Host * 31.55.187.176 4 15ms

core1-hu0-12-0-3.southbank.ukcore195.99.127.44 5 12ms
peer6-hu0-6-0-6.telehouse.ukcore.195.99.127.3 6 14ms

t2c3-et-3-3-0-0.uk-lon1.eu.bt.net166.49.211.238 7 11ms
166-49-211-38.eu.bt.net 166.49.211.38 8 22ms

 

Once again, every hop on the BT network seems to be a 'dual' one.

Running the test on both Sky and Virgin routes show a 50% reduction in the number of hops.

 

This doesnt look sensible, let alone optimal or efficient.

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Sage
Sage
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Message 7 of 11

Re: BT Infrastructure the reason for poor latency in online games?

You are correct in that there is no way for you to reduce the hops but you are following a red herring and, no disrespect, do not understand networking.

As regards the hops within BT's or any other ISP's network although you may not be directed by what you consider is the most direct route but by the fastest available at the time.

From the only full tracerts you've posted you've only shown a difference of 2milliseconds difference in latency.

Grewks94
Beginner
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Message 8 of 11

Re: BT Infrastructure the reason for poor latency in online games?

"You don't understand networking" seems to be a common answer from someone looking to divert the attention away from who is clearly at fault here, BT.

 

The internet is full of threads, slating BT's routing, and even when i provide proof, it is attempted to be shot down once again.

 

Another example of how the BT network is to blame is here.

* Unknown Host * 31.55.187.177 3 11ms
* Unknown Host * 31.55.187.176 4 15ms
core1-hu0-12-0-3.southbank.ukcore195.99.127.44 5 12ms
peer6-hu0-6-0-6.telehouse.ukcore.195.99.127.3 6 14ms
t2c3-et-3-3-0-0.uk-lon1.eu.bt.net166.49.211.238 7 11ms
166-49-211-38.eu.bt.net 166.49.211.38 8 22ms

 

This time to a server outside of the UK, where once again every hop inside the BT network is being almost 'duplicated'.

 

Criticizing my knowledge of networking is pretty condescending when you don't understand that each packet is sent through a network route. The ping from my router to the end server is virtually irrelevant compared to the route each packet takes.

More hops = More latency + Increased chances of packet loss.

 

Going through the same IP range twice will never be the 'fastest route', compared to going through it once.

This.....

* Unknown Host * 31.55.187.177 3 11ms
* Unknown Host * 31.55.187.176 4 15ms
core1-hu0-12-0-3.southbank.ukcore195.99.127.44 5 12ms
peer6-hu0-6-0-6.telehouse.ukcore.195.99.127.3 6 14ms
t2c3-et-3-3-0-0.uk-lon1.eu.bt.net166.49.211.238 7 11ms
166-49-211-38.eu.bt.net 166.49.211.38 8 22ms

 

Will always be slower than this 

* Unknown Host * 31.55.187.177 3 11ms
core1-hu0-12-0-3.southbank.ukcore195.99.127.44 5 12ms
166-49-211-38.eu.bt.net 166.49.211.38 8 22ms

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Sage
Sage
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Message 9 of 11

Re: BT Infrastructure the reason for poor latency in online games?

Yert they both have the same latency. Would you like to explain that one?

THIS may help you.

It is also pretty condescending of you to think I may not perhaps know more about networking than you.

As this thread is getting nowhere I'll now bow out.

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Grewks94
Beginner
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Message 10 of 11

Re: BT Infrastructure the reason for poor latency in online games?

How can you say the latency is the same?

 

So you're suggesting that this -

 

10.0.0.1 1 1ms
* Unknown Host * 0.0.0.0 2 0ms
* Unknown Host * 31.55.187.181 3 14ms
* Unknown Host * 31.55.187.180 4 13ms
core2-hu0-17-0-5.southbank.ukcore195.99.127.190 5 14ms
peer2-et0-1-5.slough.ukcore.bt.ne62.172.103.210 6 13ms
* Unknown Host * 195.66.224.116 7 14ms
* Unknown Host * 0.0.0.0 8 0ms
* Unknown Host * 134.213.97.149 9 16ms
corea-core6.lon3.rackspace.net 164.177.137.13 10 16ms
core6-eaaggr1a.lon3.rackspace.net31.222.133.213 11 17ms
* Unknown Host * 134.213.37.197 12 14ms

 

 

Is the same as this -

 

10.0.0.1 1 1ms
* Unknown Host * 0.0.0.0 2 0ms
* Unknown Host * 31.55.187.181 3 14ms

 

 

Because latency = 14ms on both.

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