When downloading at full speed 10 meg connection drops to websites intermitently

[GhostMjr]

Hi,

I had 20 meg and downgraded to 10 meg.

I have been away from my rents address for months so i can't say how long the issue has been going on.

Basically if i am downloading something at full pelt 1.25mb/s sometimes webpages load sometimes they don't by this i mean they either load slowly or give up and send a time out message.

On my uni 8 meg adsl nildram line this didn't happen but virgin seems to be cutting out with timeout issues intermittently and i am sure it never did this before.

I have a ntl cable modem 250 connected to the free white netgear vm router.


Thanks for your help!


Modem configs here and i am connected to bromley:

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 150
Downstream Frequency : 322750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : 0.5 dBmV
Downstream SNR : 33.4 dB

Item Status Comments
Acquire a Downstream Channel 322750000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 3
Upstream Frequency : 45808000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 47.0 dBmV
Upstream Mini-Slot Size : 2

Req


Init Maint


Per Maint


Short Data


Long Data


(1)


(3)


(4)


(5)


(6)
Modulation Type QPSK QPSK QPSK 16QAM 16QAM
Differential Encoding Off Off Off Off Off
Preamble Length 36 100 100 128 128
Preamble Value Offset 244 6 6 504 504
FEC Error Correction (T) 0 5 5 4 9
FEC Codeword Information Bytes (k) 16 34 34 76 232
Scrambler Seed 338 338 338 338 338
Maximum Burst Size 0 0 0 7 0
Guard Time Size 22 48 48 22 22
Last Codeword Length Fixed Fixed Fixed Short Short
Scrambler on/off On On On On On

Network Access : Allowed
Maximum Downstream Data Rate : 10240000
Maximum Upstream Data Rate : 512000
Maximum Upstream Channel Burst : 1600
Maximum Number of CPEs : 1
Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS Enabled

[Raistlin]

Your connection to a web server requires 2-way traffic. For every piece of data that is sent to you your web browser will send back a confirmation that the data has been received properly and that the next piece can be sent.

Also, the initialisation of the connection in the first place requires the exchange of various pieces of data.

If you're hammering your download you will also probably be swamping your upload with return packets.

You need to leave some bandwidth free in both directions otherwise, as you're finding out, things just don't work properly.

[Sephiroth]

I've got to agree with Rob M based on your "fult pelt" remark. I can reproduce what you report.

Your modem report shows that it is in a proper nominal state. This you would need to know for peace of mind.

This happens on my ADSL2+ line as well - so I can only assume that at your university either transmission conditions weren't as per at home (i.e the pipe from the uni) or you weren't doing the same stuff.