Results 1 to 9 of 9

Thread: My Cablenut settings

  1. #1
    Murders & Executions Cypher's Avatar
    Join Date
    Jul 2002
    Location
    Returning video tapes
    Posts
    2,717

    My Cablenut settings

    I'm still on Comcast with 1800/256 speeds. I'm using the onboard LAN for my MB which is an Intel 82547EI Gigabit with CSA. I've used Steeles reg tweaks as always. Well here's the settings I'm running now. I think I can do a little better though:
    CableNut Custom Settings File 1.0
    win2k
    230400
    32768
    1
    200
    480
    640
    819200
    64000
    150400
    0
    12800
    32
    4096
    1
    1
    0
    23360
    8000
    16384
    5000000
    1
    1
    0
    1
    3
    100
    80
    1460
    1460
    30
    0
    23360
    10
    8
    64
    0
    6
    240

    Here's my results:
    TCP options string = 020405b401010402
    MTU = 1500
    MTU is fully optimized for broadband.
    MSS = 1460
    Maximum useful data in each packet = 1460, which equals MSS.

    Default Receive Window (RWIN) = 17520
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 17520

    RWIN is a multiple of MSS
    Other values for RWIN 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:

    Your RcvWindow limits you to: 700.8 kbps (87.6 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 280.32 kbps (35.04 KBytes/s) @ 500ms
    Consider increasing your RWIN value to optimize TCP/IP for broadband.
    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) = 11110000

    Precedence (priority) = 000 (routine)
    Delay = 0 (normal delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 1 (low cost)

    As always any help is greatly appreciated.

  2. #2
    Regular Member j79zlr's Avatar
    Join Date
    Apr 2003
    Posts
    242
    Did you reboot after applying the settings, that TCP analyzer doesn't show the changes.

  3. #3
    Murders & Executions Cypher's Avatar
    Join Date
    Jul 2002
    Location
    Returning video tapes
    Posts
    2,717
    You're right There are a few settings that I think I still missed though. Here's my current results:

    TCP options string = 020405b401010402
    MTU = 1500
    MTU is fully optimized for broadband.
    MSS = 1460
    Maximum useful data in each packet = 1460, which equals MSS.

    Default Receive Window (RWIN) = 23360
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 23360

    RWIN is a multiple of MSS
    Other values for RWIN 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:

    Your RcvWindow limits you to: 934.4 kbps (116.8 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 373.76 kbps (46.72 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) = 11110000

    Precedence (priority) = 000 (routine)
    Delay = 0 (normal delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 1 (low cost)


  4. #4
    SG Enthusiast
    Join Date
    Mar 2002
    Location
    Poland
    Posts
    1,107
    your SG TCP/IP Analyzer result IMVHO looking good
    but TOS=240

    below you can find very few sugestions for experiments
    for your future TOS
    pay attention on (only for easier reading on post)
    tos - value with subfield reserve=0
    vs
    TOS -value with subfield reserve=1
    so "mirror's reflection" tos (reserve=0) ~ TOS (but reserve=1)

    with subfields meaning
    { reserve | cost | reability | throughput | delay | prioryty prioryty prioryty }
    first subfield is mentioned reserve is not shown
    in SG TCP/IP Analyzer result: TypeOfService (TOS)
    only in IP type of service field (RFC1349)=

    so if you want play with TOS you can try:
    tos = # { IP type of service field (RFC1349)} value TOS with reserve=1
    tos=112{ r___1___1___1___0___0_0_0 __} TOS=240
    -tos=92{ r___1___0___1___1___1_0_0 __} TOS=220
    -tos=15{ r___0___0___0___1___1_1_1 __} TOS=143
    -tos=55{ r___0___1___1___0___1_1_1 __} TOS=183
    -tos=59{ r___0___1___1___1___1_1_1 __} TOS=187

    PS but manuals concerning on TypeOfService(TOS)
    ...TOS (Type Of Service) A field in an IP packet (IP datagram)
    that is used for quality of service (QoS).
    The TOS field is 8 bits, broken into five subfields
    ...
    from TechEncyclopedia http://www.techweb.com/encyclopedia/...m=TOS&x=21&y=7 second meaning hehehe
    above is NOT quotation from EG 116th Ed 1020 F.E. by Encyclopedia Galactica Publilishing Co,. Terminus

    so easier to explain:
    IMVHO should be
    ...The TOS field is 8 bits, broken into five subfields...
    and additional
    reserve sixth subfield ...
    BTW as above NOT shown by in SG TCP/IP Analyzer TOS detailed result
    - only in IP type of service field (RFC1349)

    exactly:
    TOS value >> string >> five factors (ON | off) for PPP;D;T.R,C and reserve
    subfield meaning; with options for priority as folow:
    1. Precedence (priority)= eight options (compilations 0&1 options as below)
    000=routine (default)
    001=priority
    010=immediate
    011=flash
    100=flash overide
    101=CRITIC/ECP
    110=internetwork control
    111=network control

    2. Delay = two options (1=YES; 0=no)
    3. Throughput = two options (1=YES; 0=no)
    4. Reliability = two options (1=YES; 0=no)
    5. Cost = two options (1=YES; 0=no)
    ... reserve = none option = 0

    value rage 0-255; in registry not present by default (not present means TOS=0)
    converted to string & read in results
    SG TCP/IP Analyzer as IP type of service field (RFC1349)= 00000000
    yours sample for TOS=240
    IP type of service field (RFC1349) = 11110000
    Precedence (priority) = 000 (routine)
    Delay = 0 (normal delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 1 (low cost)

    not show reserve = 1

    but if someone see on your result
    one can read SG TCP/IP Analyzer IP type of service field (RFC1349)
    BUT from right to left 0 | 0 | 0 | 0 | 0 | 000 exactly as TOS subfields
    - simply read as follow r | C | R | T | D | PPP

    Unfortuately in my case TOS value not working for me
    one can say that tweaking value o TOS setting is unclear
    me ... NONE
    Last edited by Andrzej; 09-20-03 at 05:01 AM.

  5. #5
    Murders & Executions Cypher's Avatar
    Join Date
    Jul 2002
    Location
    Returning video tapes
    Posts
    2,717
    Thanks Andy. I'm trying to learn how to do all of this and I appreciate the help. Here's my recent results and a screeny of my current CN settings.

    TCP options string = 020405b401010402
    MTU = 1500
    MTU is fully optimized for broadband.
    MSS = 1460
    Maximum useful data in each packet = 1460, which equals MSS.

    Default Receive Window (RWIN) = 23360
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 23360

    RWIN is a multiple of MSS
    Other values for RWIN 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:

    Your RcvWindow limits you to: 934.4 kbps (116.8 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 373.76 kbps (46.72 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) = 11110000

    Precedence (priority) = 000 (routine)
    Delay = 0 (normal delay)
    Throughput = 1 (high throughput)
    Reliability = 1 (high reliability)
    Cost = 1 (low cost)


    Settings screeny:


    Am I missing anything here?

  6. #6
    Dr Tweak mnosteele52's Avatar
    Join Date
    Jul 2001
    Location
    Chesapeake, VA
    Posts
    11,912
    Everything looks perfect, how is your speed?


  7. #7
    Murders & Executions Cypher's Avatar
    Join Date
    Jul 2002
    Location
    Returning video tapes
    Posts
    2,717
    Hey Steele,
    Seems very fast to me. I'm trying to learn how you guys do these tweaks like I was saying and wanted to make sure I was on the right path. Thanks for all the help.

  8. #8
    SG Enthusiast
    Join Date
    Mar 2002
    Location
    Poland
    Posts
    1,107
    ...How...ect - carefully

  9. #9
    Murders & Executions Cypher's Avatar
    Join Date
    Jul 2002
    Location
    Returning video tapes
    Posts
    2,717
    LOL

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
  •