Network Speed Optimizer

By wazza
Sep 20, 2006
  1. Does any one know of a free network speed optimizer?
  2. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    go to
    theres 2
    a few more dp google be sure and check around first before installing unknown softs
    do a search for tcpip reg settings
  3. wazza

    wazza TS Rookie Topic Starter Posts: 69

    Is there any program in particular that you have used?
  4. jobeard

    jobeard TS Ambassador Posts: 9,315   +618

    four settings are effective on Windows
    1. tcp window size (Recv window 65535)
      [HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \Tcpip \Parameters \Interfaces \{Adapter-id}]
      TCPWindowSize = 17520
    2. mtu size (use 1492, not 1500)
      Network Type	MTU (bytes)	Details
      Ethernet	  1500	 
      [COLOR="RoyalBlue"]IEEE              802.3/802.2	1492	[/COLOR] 
      PPPoE	          1492	        Optimal MTU for PPPoE over ATM is 1454
      X.25	           576	        Dialup Connection
      Ethernet (Jumbo)	         >=9000	Gigabit networking
    3. ackdelay (see KB article)
      Note SMB Signing requires that SMB commands are processed synchronously, so a client is only allowed to send the next SMB command when it receives ACK of the previous one (Only one outstanding). This means that a client can max sent 5 SMB Commands/sec, as it has to wait for the Server's 200 ms ACK delay before it is allowed to sent the next SMB Command. This can cause very low performance when copying small files to a Server with SMB signing enabled (Imagine copying 1000 files of 1 Kbyte).
    4. Selective acknowledgments (SACK) (described in RFC 2018)
      [HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \Tcpip \Parameters]
      SackOpts = 1 (Enabled = 1, Disabled = 0, Default = 1)
  5. tipstir

    tipstir TS Ambassador Posts: 2,387   +106

    TCP Optimzer

    With my network and Cable Modem Dwn: 15,000 Mbp and Upl: 2,000

    Speed Easy Test #1

    TCP Optimizer Settings Page #1

    TCP Optimizer Advance Settings Page #2

    Speed Easy Test #2
  6. wazza

    wazza TS Rookie Topic Starter Posts: 69

    Thanks for the help.
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