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Thread: For Timestamps!!! i need to know some info!!!

  1. #1
    Regular Member erogic1's Avatar
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    Wink For Timestamps!!! i need to know some info!!!

    First of all, what does this mean -"Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data". i have timestamps on right now and now it says this, so what does it mean??

    And second of all this is a good connection or what??
    TCP options string = 020405ac010303030101080a000000000000000001010402

    MTU = 1492
    MTU seems to be optimized for PPPoE... If you are not on a PPPoE connection, consider increasing your MTU to 1500 for optimal throughput.

    MSS = 1452
    Maximum useful data in each packet = 1440, which is less than MSS because of Timestamps, or other TCP/IP options used.
    MSS is optimized for PPPoE. If you are not on a PPPoE connection, consider increasing your MTU value.

    Default Receive Window (RWIN) = 511104
    RWIN Scaling (RFC1323) = 3 bits
    Unscaled Receive Window = 63888
    RWIN is a multiple of MSS
    Other values for RWIN that might work well with your current MTU/MSS:
    255552 (MSS x 44 * scale factor of 4)
    127776 (MSS x 44 * scale factor of 2)
    63888 (MSS x 44)

    bandwidth * delay product:
    Your RcvWindow limits you to: 20444.16 kbps (2555.52 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 8177.664 kbps (1022.208 KBytes/s) @ 500ms

    MTU Discovery (RFC1191) = ON

    Time to live left = 53 hops
    TTL value is ok.

    Timestamps (RFC1323) = ON
    Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

    Selective Acknowledgements (RFC2018) = ON

    IP type of service field (RFC1349)= 00000000

    So is it good or what??
    thz for any replies!
    AMD 700 Duron
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  2. #2
    Super Good Guy! dannjr's Avatar
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    setting Tcp13230pts to 3 enables Time stamps and scaling setting it to 1 turns on scaling only..
    If you turn on timestamps and on some connections it can make a difference like on mine for some reason..
    Anyway if you turn that on
    MSS will be figured at -52 instead of -40 that small amount may never hurt your connection but it will use more off the MTU..

    Another example
    MTU 1496 with timestamps enabled.
    MSS is 1444 insted of 1456

    To me it really isn't enough to kill the speed but for others it may..
    If it kills it allot there is something else going on that needs to be looked at

  3. #3
    Regular Member erogic1's Avatar
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    Exclamation

    how do u change the setting Tcp13230pts to 3?

    [ 03-16-2001: Message edited by: death ]
    AMD 700 Duron
    384MB ram: PC133
    Geforce2 MX/400
    Sympatico High Speed Edition DSL
    Abit KT7 Motherboard
    WindowsXP Pro

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