Results 1 to 2 of 2

Thread: slow connection with BT Total Broadband (UK)

  1. #1
    Junior Member
    Join Date
    Jul 2006
    Posts
    13

    Unhappy slow connection with BT Total Broadband (UK)

    1. What type of connection do you have? DSL PPPoA

    2. Who is your ISP and what is your advertised speed from them? iBT Total Broadband 8128/448

    3. What are your current settings now?

    SpeedGuide.net TCP/IP Analyzer


    TCP properties for IP = XX.XXX.XX.XXX ()
    Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; yplus 5.3.03b)
    Notes: Read the Analyzer FAQ if the above is not your IP address.

    TCP options string = 020405a001010402

    MTU = 1480
    MTU is optimized for Windows XP PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.

    MSS = 1440
    MSS is optimized for Windows XP PPPoE DSL broadband. If not, consider raising your MTU value.

    Default TCP Receive Window (RWIN) = 64800
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled TCP Receive Window = 64800

    RWIN is a multiple of MSS
    Other RWIN values that might work well with your current MTU/MSS:
    506880 (MSS x 44 * scale factor of 8)
    253440 (MSS x 44 * scale factor of 4)
    126720 (MSS x 44 * scale factor of 2)
    63360 (MSS x 44)

    bandwidth * delay product (Note this is not a speed test):

    Your TCP Window limits you to: 2592 kbps (324 KBytes/s) @ 200ms
    Your TCP Window limits you to: 1036.8 kbps (129.6 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 115 hops
    TTL value is ok.

    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349) = 01011100 (92)
    Precedence (priority) = 010 (immediate)
    Delay = 1 (low delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 0 (normal cost)
    Check bit = 0 (correct, 8th checking bit must be zero)

    DiffServ (RFC 2474) = No valid DiffServ equivalent. See the TCP Optimizer documentation, or RFCs 2474, 2475, 2597, 2598, 2873.


    4. Please tell us your operating system XP.

    I have just ran a speed test from a tester here in the UK and got these crazy slow results

    ==========================================
    Download Speed: 454 kbps (56.8 KB/sec transfer rate)
    Upload Speed: 32 kbps (4 KB/sec transfer rate)
    ==========================================

    I know I cant get the full
    Download Speed: 8128 kbps
    Upload Speed: 448 kbps
    but those speeds are just wrong , what can I do to speed things up ?

    thanks

    geo g

  2. #2
    Junior Member
    Join Date
    Jul 2006
    Posts
    13
    I have just ran the TCP Optimizer and set it too Optimal settings and it has improved the speed but not by very much ...
    Download Speed: 1563 kbps (195.4 KB/sec transfer rate)
    Upload Speed: 91 kbps (11.4 KB/sec transfer rate)


    My ISP gave me these settings for the MTU/MRU & MSS

    MTU 1500
    MRU 1500
    MSS 1460

    But the analyzer only showed as 1480 ??? so I raised the MTU/MRU too 1520 and MSS to 1480 on my routers config page and they now say MTU is fully optimized for broadband.

    I hope someone can help , thanks.

    SpeedGuide.net TCP/IP Analyzer


    TCP properties for IP = XX.XXX.XXX.X ()
    Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)
    Notes: Read the Analyzer FAQ if the above is not your IP address.

    TCP options string = 020405b40103030301010402

    MTU = 1500
    MTU is fully optimized for broadband.

    MSS = 1460
    Maximum useful data in each packet = 1460, which equals MSS.

    Default TCP Receive Window (RWIN) = 514080
    RWIN Scaling (RFC1323) = 3 bits (scale factor of 6)
    Unscaled TCP Receive Window = 64260

    For optimum performance, consider changing RWIN to a multiple of MSS.
    Other RWIN values that might work well with your current MTU/MSS:
    513920 (MSS x 44 * scale factor of 8)
    256960 (MSS x 44 * scale factor of 4)
    128480 (MSS x 44 * scale factor of 2)
    64240 (MSS x 44)

    bandwidth * delay product (Note this is not a speed test):

    Your TCP Window limits you to: 20563.2 kbps (2570.4 KBytes/s) @ 200ms
    Your TCP Window limits you to: 8225.28 kbps (1028.16 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 51 hops
    TTL value is ok.

    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349) = 01011100 (92)
    Precedence (priority) = 010 (immediate)
    Delay = 1 (low delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 0 (normal cost)
    Check bit = 0 (correct, 8th checking bit must be zero)

    DiffServ (RFC 2474) = No valid DiffServ equivalent. See the TCP Optimizer documentation, or RFCs 2474, 2475, 2597, 2598, 2873.

Similar Threads

  1. Replies: 2
    Last Post: 06-09-06, 07:09 AM
  2. DSL slow over ISDN connection!
    By Snorkerz in forum General Broadband Forum
    Replies: 0
    Last Post: 03-16-06, 02:45 PM
  3. Linksys WRT54G ver4 slow connection?
    By S3NTYN3L in forum Broadband Tweaks Help
    Replies: 4
    Last Post: 12-07-05, 12:21 PM
  4. My connection is much slow after tweak
    By josse81 in forum Broadband Tweaks Help
    Replies: 6
    Last Post: 05-26-05, 05:44 PM
  5. Slow connection and horriable ping
    By masthopesucks in forum General Broadband Forum
    Replies: 3
    Last Post: 05-09-05, 06:42 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •