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Latency/Speed Problem - 2mbit

N/A

Latency/Speed Problem - 2mbit

I'm trying to work out the cause of the very poor performance of my "PlusNet Broadband Premier - Up to 2Mb" account. I'm seeing poor download speeds as well as high/unstable pings. This seems to have got worse in the last week or so.

ADSLGuide speed test results range from 500kbps to 900kbps.
BT Speed Tester results range from 400kbps to 500kbps.


Here are some pings/traceroutes to portal.plus.net done at 4pm on Saturday - I see similar performance at all times between 7am and midnight. I see fewer ping spikes after midnight though.

portal.plus.net [212.159.8.137]
Ping statistics for 212.159.8.137:
Packets: Sent = 86, Received = 86, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds: Minimum = 27ms, Maximum = 127ms, Average = 61ms

connected to pte-ag2

1 <1 ms <1 ms <1 ms 192.168.0.1
2 54 ms 56 ms 75 ms lo0-plusnet.pte-ag2.plus.net [195.166.128.72]
3 119 ms 63 ms 63 ms ge0-0-0-504.pte-gw2.plus.net [84.92.4.90]
4 45 ms 55 ms 47 ms gi5-0-22.pth-gw2.plus.net [212.159.4.5]
5 63 ms 70 ms 69 ms atm0-1-0.ptb-gw1.plus.net [195.166.129.246]
6 73 ms 64 ms 79 ms vlan18.pri.ptb-gw4.plus.net [195.166.129.130]
7 58 ms 52 ms 65 ms if2.ptb-al1.plus.net [195.166.129.39]
8 104 ms 128 ms 87 ms portal.plus.net [212.159.8.137]

connected to ptn-ag2

1 <1 ms <1 ms <1 ms 192.168.0.1
2 44 ms 29 ms 34 ms lo0-plusnet.ptn-ag2.plus.net [195.166.128.53]
3 32 ms 35 ms 41 ms ge1-0-0-204.ptn-gw2.plus.net [84.92.3.106]
4 39 ms 49 ms 35 ms gi4-0-23.pth-gw2.plus.net [212.159.4.21]
5 49 ms 53 ms 56 ms atm0-1-0.ptb-gw1.plus.net [195.166.129.246]
6 42 ms 51 ms 52 ms vlan18.pri.ptb-gw4.plus.net [195.166.129.130]
7 46 ms 43 ms 49 ms if2.ptb-al1.plus.net [195.166.129.39]
8 100 ms 58 ms 88 ms portal.plus.net [212.159.8.137]


MTU size is 1478 - no packet fragmentation detected when running tests.

Router: Netgear DG834G (using wired connection) with firmware version 2.10.22.

DownStream Connection Speed 2272 kbps.

BT Exchange is Woking, which is green - though there are upgrades happening at the moment. Could this be the problem? I don't know how to tell which DSLAM I'm on.

Does anyone have any suggestions?
29 REPLIES
craigbrass
Grafter
Posts: 1,009
Registered: 30-07-2007

Latency/Speed Problem - 2mbit

Do 3 ADSL Guide Speed Tests, 3 PlusNet Portal Speed Tests and 3 BT Speedtests (using the speed test login) and record their results in a text file. Submit your problem as a ticket and put all speed test results in. They will then investigate it.
N/A

Latency/Speed Problem - 2mbit

Hi there,

If the BT speedtester is showing slow speeds, then the problem is probably with your lne or exchange.

If the situation gets better after midnight then you might be seeing the effects of contention at your exchange.

Unfortunately, as you are getting speeds of 400- 500 kbps, BT will deem that to be within their rediculous limits and are unlikely to rush to fix it.

I would imagine that if there is work planned for your exchange, they should fix this then.
craigbrass
Grafter
Posts: 1,009
Registered: 30-07-2007

Latency/Speed Problem - 2mbit

It's still worth chasing up with PlusNet though. They will agree that the speeds you are getting are real bad and may be able to do summin.
N/A

Latency/Speed Problem - 2mbit

From the problems raised by kitz (PN Usergroup) on ADSL guide it would appear not that easy.
N/A

Latency/Speed Problem - 2mbit

thanks for the replies Smiley.

I've raised a ticket with PlusNet after getting a BT speedtester result of ~300kbps after midnight. They passed it on to BT, who have been running some diagnostics on the line. I've just spoken to a BT engineer who says everything seems fine with the connection to the BT network, and can't explain why it's slow.

The the interesting anomaly other than the slow speedtest is the unstable ping. I'm testing by pinging portal.plus.net every second, with no other activity on the connection. The pings I'm getting right now (10:40pm) are sometimes around 15-20ms, sometimes 20-30, sometimes 50-60, and occasionally there is a spike to 100-200ms.
http://www.l8nc.com/graph.php?jid=8476c59dd1338edce0db699a2d25678e

Here's a few consecutive pings (once per second, taken at 10:45pm):
29ms, 46ms, 21ms, 23ms, 68ms, 17ms, 20ms, 15ms, 19ms, 18ms, 39ms, 24ms, 21ms, 29ms, 18ms, 42ms, 24ms, 20ms, 36ms, 36ms, 16ms, 23ms

Is this normal or strange? Has anyone else seen the same problem? Could my router be to blame for the speeds/latency I'm getting?
N/A

Latency/Speed Problem - 2mbit

Sunday morning seems to be the worst so far..

ADSLGuide: downstream 118kbps
http://www.adslguide.org.uk/tools/speedchart.asp?id=9d16b5231054876d1cd9d16b523

BT SpeedTester: 232kbps

Tracing route to portal.plus.net [212.159.8.137]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.0.1
2 119 ms 83 ms 73 ms lo0-plusnet.pth-ag3.plus.net [195.166.128.64]
3 107 ms 138 ms 85 ms ge0-0-0-403.pte-gw2.plus.net [84.92.4.2]
4 100 ms 77 ms 95 ms gi5-0-22.pth-gw2.plus.net [212.159.4.5]
5 94 ms 91 ms 126 ms atm0-1-0.ptb-gw1.plus.net [195.166.129.246]
6 101 ms 94 ms 79 ms vlan18.pri.ptb-gw4.plus.net [195.166.129.130]
7 108 ms 130 ms 104 ms if2.ptb-al1.plus.net [195.166.129.39]
8 85 ms 92 ms 94 ms portal.plus.net [212.159.8.137]


Pinging portal.plus.net [212.159.8.137] with 32 bytes of data:

Reply from 212.159.8.137: bytes=32 time=169ms TTL=249
Reply from 212.159.8.137: bytes=32 time=151ms TTL=249
Reply from 212.159.8.137: bytes=32 time=102ms TTL=249
Reply from 212.159.8.137: bytes=32 time=64ms TTL=249
Reply from 212.159.8.137: bytes=32 time=120ms TTL=249
Reply from 212.159.8.137: bytes=32 time=72ms TTL=249
Reply from 212.159.8.137: bytes=32 time=130ms TTL=249
Reply from 212.159.8.137: bytes=32 time=111ms TTL=249
Reply from 212.159.8.137: bytes=32 time=84ms TTL=249
Reply from 212.159.8.137: bytes=32 time=100ms TTL=249
Reply from 212.159.8.137: bytes=32 time=135ms TTL=249
Reply from 212.159.8.137: bytes=32 time=86ms TTL=249
Reply from 212.159.8.137: bytes=32 time=225ms TTL=249
Reply from 212.159.8.137: bytes=32 time=216ms TTL=249
Reply from 212.159.8.137: bytes=32 time=118ms TTL=249
Reply from 212.159.8.137: bytes=32 time=239ms TTL=249
Reply from 212.159.8.137: bytes=32 time=178ms TTL=249
Reply from 212.159.8.137: bytes=32 time=267ms TTL=249
Reply from 212.159.8.137: bytes=32 time=236ms TTL=249

Reply from 212.159.8.137: bytes=32 time=135ms TTL=249

Ping statistics for 212.159.8.137:
Packets: Sent = 20, Received = 20, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 64ms, Maximum = 267ms, Average = 146ms

I've tried rebooting the modem/router, and I've tried using a completely different modem/router. The speed and latency problems remain.

My ticket (17046324) is waiting for the PN faults team to look at it on monday.

Am I really the only adsl user getting this? My exchange VP capacity is still reported to be green (Woking). The only explanation remaining in my opinion is contention at the BT exchange at peak times. There must be a lot of (heavy) users sharing my virtual path. How can I get BT to flag this as a lack/misconfiguration of exchange capacity?
N/A

Latency/Speed Problem - 2mbit

Hi kingsgate1, your not the only one having problems this morning, my speeds are appalling.


Downstream 170 Kbps (21.3 KB/sec) 183 Kbps (inc. overheads)
Upstream 254 Kbps (31.8 KB/sec) 274 Kbps (inc. overheads)

Downstream 208 Kbps (26.0 KB/sec) 224 Kbps (inc. overheads)
Upstream 255 Kbps (31.9 KB/sec) 275 Kbps (inc. overheads)

Downstream 57 Kbps (7.1 KB/sec) 61 Kbps (inc. overheads) :shock:
Upstream 255 Kbps (31.9 KB/sec) 275 Kbps (inc. overheads)




---------------------------------------------------------------------------------------------------------------

24-07-2005 10:26:34 225
24-07-2005 10:26:09 159.7
24-07-2005 11:47:45 96.3 :shock:

----------------------------------------------------------------------------------------------------------------

222 kilo bits per second (Kbps), your service bandwidth will have been quoted to you in kilo bits per second.

61 kilo bits per second (Kbps), your service bandwidth will have been quoted to you in kilo bits per second :shock:
N/A

Latency/Speed Problem - 2mbit

Those speeds look marginally worse than mine.. Smiley

What kind of latency are you getting?
Try these tests in a cmd window:

tracert portal.plus.net
ping -n 20 portal.plus.net
N/A

Latency/Speed Problem - 2mbit

I will raise a ticket tomorrow if there is no improvement, at the moment the "contact us" page won't load due to my poor connection and I got fed up waiting in a queue on the phone.


Tracing route to portal.plus.net [212.159.8.137]
over a maximum of 30 hops:

1 28 ms 29 ms 19 ms lo0-plusnet.pte-ag2.plus.net [195.166.128.72]
2 21 ms 19 ms 20 ms ge0-0-0-504.pte-gw1.plus.net [84.92.4.89]
3 19 ms 19 ms 19 ms gi4-0-23.pth-gw2.plus.net [212.159.4.21]
4 26 ms 30 ms 29 ms atm0-1-0.ptb-gw1.plus.net [195.166.129.246]
5 28 ms 29 ms 29 ms vl4.pri.ptb-gw3.plus.net [195.166.129.226]
6 29 ms 29 ms 29 ms if2.ptb-al1.plus.net [195.166.129.39]
7 35 ms 29 ms 29 ms portal.plus.net [212.159.8.137]

Trace complete.


---------------------------------------------------------------------------


Pinging portal.plus.net [212.159.8.137] with 32 bytes of data:

Reply from 212.159.8.137: bytes=32 time=31ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=26ms TTL=250
Reply from 212.159.8.137: bytes=32 time=26ms TTL=250
Reply from 212.159.8.137: bytes=32 time=26ms TTL=250
Reply from 212.159.8.137: bytes=32 time=26ms TTL=250
Reply from 212.159.8.137: bytes=32 time=29ms TTL=250
Reply from 212.159.8.137: bytes=32 time=29ms TTL=250
Reply from 212.159.8.137: bytes=32 time=29ms TTL=250
Reply from 212.159.8.137: bytes=32 time=28ms TTL=250
Reply from 212.159.8.137: bytes=32 time=28ms TTL=250
Reply from 212.159.8.137: bytes=32 time=28ms TTL=250
Reply from 212.159.8.137: bytes=32 time=28ms TTL=250
Reply from 212.159.8.137: bytes=32 time=28ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250
Reply from 212.159.8.137: bytes=32 time=27ms TTL=250

Ping statistics for 212.159.8.137:
Packets: Sent = 20, Received = 20, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 26ms, Maximum = 31ms, Average = 27ms
N/A

Latency/Speed Problem - 2mbit

Just look at this BT test result Sad It took about 20 mins to complete.

I've been told to do another test between midnight and 7am and then PN will pass it onto BT so they can look into this problem.

19 kilo bits per second (Kbps), your service bandwidth will have been quoted to you in kilo bits per second.
N/A

Latency/Speed Problem - 2mbit

That has to be a record Smiley

As your latency seems fine, I guess I have a different problem. Perhaps it's not VP contention after all.
N/A

Latency/Speed Problem - 2mbit

Quote
That has to be a record Smiley

As your latency seems fine, I guess I have a different problem. Perhaps it's not VP contention after all.


My exchange VP status is RED btw. Just played HL2 deathmatch, ping was around 40-45 but much more laggy then usual.
N/A

Latency/Speed Problem - 2mbit

Just to add my comment...

Im currently getting about 300 on the 2mb Premier package. I appreciate my exchange is red but there seem to be a lot of problems all over a wide range of user from all over the country.

Can anyone from PN please comment?

Ray
N/A

Latency/Speed Problem - 2mbit

Quote
Just to add my comment...

Im currently getting about 300 on the 2mb Premier package. I appreciate my exchange is red but there seem to be a lot of problems all over a wide range of user from all over the country.

Can anyone from PN please comment?

Ray


Hi raybb3uk,

What do you get on the BT speedtest ?