BT Speedtester

[#1]

I had this query a while back, it depends on what your profile is showing,  mine was 7000 again with a download of only 900 ish, again I couldnt realy have cared less for the same reasons as you, I followed the Kitz route and tweeked my Rwin, it was about 8000 from memory and I put it up to 100000 now my download speed is in the region of 5800-6000.  dont normally notice any difference on what we do only on downloads

[#2]

*Jelv*
I can see the logic in what you're saying; the mismatch in MTU results in fragmentation...
BUT for most people, and for download speed tests definitely, we're looking at traffic FROM the Internet through the router to the PC.
So having the router MTU smaller than the PC shouldn't cause a problem, should it....
(And yes, I know there's traffic the other way but it should mostly be very small acknowledgement packets surely?)
I'm trying to understand this logically and failing so far.
PS I am a mathematician!

[#3]

Not sure of the exact mechanism - but I've seen the difference! I think it is something like if the sender doesn't find the MTU in the router but finds the PC says it will accept 1500, it may send 1500 byte messages. These will then be fragmented by the router. (MTU path discovery should see that the router only accepts smaller packets and the sender should therefore send smaller packets)

[#4]

just tried the BT speedtester again and I am getting an 'Internal Server Error'.  It's been like this all afternoon. is anyone else able to get through to the site?

[#5]

"The system is currently busy. Please try again shortly, however if this problem persists, raise the issue with your service provider."
*Jelv* Yes, I've seen a (significant) difference too, but I don't understand why, which is very frustrating! 

[#6]

Quote

nternal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, speedtester@bt.com and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Apache/1.3.27 Server at speedtester1.speedtester.bt.com Port 80

Just now 

[#7]

gets even better

Quote

This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:   speedtester@bt.com     SMTP error from remote mailer after end of data:     host smtp63.intersmtp.com [62.239.224.236]: 550 5.7.1 Message rejected as spam by Content Filtering. ------ This is a copy of the message, including all the headers. ------ Subject: error message Date: Sun, 23 Mar 2008 17:07:25 -0000 Apache/1.3.27 Server at speedtester1.speedtester.bt.com Port 80

[#8]

What a joke the BT speedtester is. I can't believe it!!

[#9]

They seem to have fixed it:
IP profile for your line is - 7150 kbps
    DSL connection rate: 448 kbps(UP-STREAM)  8128 kbps(DOWN-STREAM)
    Actual IP throughput achieved during the test was - 3264 kbps
Unfortunately they broke something else - all 622mbps of it! 

[#10]

Good to see it's working again.  Just ran a test and speeds seem very low compared to what I normally get.  Any reason for this apart from the time of day?
Test1 comprises of Best Effort Test:  -provides background information.
    IP profile for your line is - 6500 kbps
    DSL connection rate: 448 kbps(UP-STREAM)  7616 kbps(DOWN-STREAM)
    Actual IP throughput achieved during the test was - 2717 kbps

[#11]

Just read the PN update on Broadband network capacity so now I Know why my speed is lower at present.