ArcticWolf Posted February 12, 2006 CID Share Posted February 12, 2006 I have a 3meg down/800k up connection, and through a router.. which I can't seem to change the MTU which is 1452, that means an MSS is 1412. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
ROM-DOS Posted February 12, 2006 CID Share Posted February 12, 2006 ArcticWolf ~ run TCP/IP analyzer to check your MTU, then you can try Cablenut Settings Calculator to make YOUR own .css file. . .run a tracert from the command prompt, to determine your latency. . . .under 'Cablenut Setting Files', you may want to copy 'Printable Settings' and 'save as' in Notepad. Then insert the settings manually into Cablenut Adjuster ~ then 'SAVE as' ~ to create YOUR .css file ~ then 'Save to Registry' in Adjuster. Quote Link to comment Share on other sites More sharing options...
trogers Posted February 12, 2006 CID Share Posted February 12, 2006 Hi Artic Wolf, We can try to use the TCP Optimizer to set the MTU to its highest value if this value is not a limitation imposed by your modem/router. In the latter case, adjustment has to be made by tweaking the driver of the hardware. Download the TCP Optimizer at www.speedguide.net and do the following: General Settings tab: Custom settings - check Modify All Network Adapters - check network adapter selection - your NIC MTU - 1500 TTL - 64 TCP Receive Window - blank MTU Discovery - Yes Black Hole Detect - No Selective Acks - Yes Max Duplicate ACKs - 2 TCP 1323 Options: Windows Scaling - uncheck Timestamps - uncheck Advanced Settings tab: Max Connections per Server - 10 Max Connections per 1.0 Server - 20 LocalPriority - 5 Host Priority - 6 DNSPriority - 7 NetbtPriority - 8 Lan Browsing speedup - optimized QoS: NonBestEffortLimit - 0 ToS: DisableUserTOSSetting - 0 ToS: DefaultTOSValue - 240 MaxNegativeCacheTtl - 0 NetFailureCacheTime - 0 NegativeSOACache Time - 0 LAN Request Buffer Size - 32768 Then select "Apply Changes" and reboot to take effect You can use the feature in TCP Optimizer to find the value of your largest MTU. Open TCP Optimizer, set MTU to 1500, click 'Largest MTU', then enter any website address and click 'Start'. Your comp will send out pings and establish your system's largest MTU value. If your largest MTU value is more than 1452 we can make a ccs file for you following the value. Quote Link to comment Share on other sites More sharing options...
trogers Posted February 12, 2006 CID Share Posted February 12, 2006 If after trying both and MTU is still set at 1452, here is a ccs file for this setting. After loading this ccs file and speed testing, you can make modifications to the following 2 fields and see if it works better: DefaultReceiveWindows - 62128 Tcp13230pts - 0 RWIN setting of 124256 is suitable for latency range of 150-300 ms. RWIN setting of 62128 is suitable for latency less than 150 ms. Quote Link to comment Share on other sites More sharing options...
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