vdsl2 optimize settings

codetr · Post by **codetr** » Tue Jun 23, 2015 1:21 pm

hi all

TCP options string = 020405780103030801010402
MTU = 1440
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput. If you are using a router, it could be limiting your MTU regardless of Registry settings.
MSS = 1400
MSS is not optimized for broadband. Consider increasing your MTU value.
Default TCP Receive Window (RWIN) = 66560
RWIN Scaling (RFC1323) = 8 bits (scale factor: 2^8=256)
Unscaled TCP Receive Window = 260

In Windows 8.1, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the latest TCP Optimizer for tweaking.
You seem to be using Google Chrome. Note that Chrome can modify the TCP Window for sockets it creates under some OSes, and therefore servers may not get your correct RWIN value. You may want to test with a different browser. FAQ
RWIN is not fully optimized. The unscaled RWIN value is lower than it should be. Also, RWIN being close to and above 65535 does not justify the header overhead of enabling TCP 1323 Options. You might want to use one of the recommended RWIN values below.

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
64400 (up to 2 Mbit lines, depending on latency. MSS * 46)
128800 (1-5 Mbit lines, depending on latency. MSS * 46 * 2)
257600 (2-14 Mbit lines, depending on latency. MSS * 46 * 2^2)
515200 (8-30 Mbit lines, depending on latency. MSS * 46 * 2^3)
1030400 (25-60 Mbit lines depending on latency. MSS * 46 * 2^4)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2662 kbps (333 KBytes/s) @ 200ms
Your TCP Window limits you to: 1065 kbps (133 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 44 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)

I use vdsl2

PPPoE
Encapsulation: VCMUX
modem mtu: 1492
win8.1 pro
realtek on board lan

I play online gaming BF4. I've tried dozens of settings, but I'm not sure done.

Post by **Philip** » Tue Jun 23, 2015 9:22 pm

Have you tried the TCP Optimizer ? Just set it to "optimal" and apply the settings to start with.

Your effective MTU seems to be 1440 rather than 1492... It could be imposed by your ISP. If you can't get bigger packets, I'd just set the local MTU at the same number.

You may want to check the Gaming tweaks article here: http://www.speedguide.net/articles/gaming-tweaks-5812
There is also a Network Adapter optimization article linked at the bottom you may want to see.

I hope this helps

codetr · Post by **codetr** » Wed Jun 24, 2015 5:33 am

Philip wrote:Have you tried the TCP Optimizer ? Just set it to "optimal" and apply the settings to start with.

Your effective MTU seems to be 1440 rather than 1492... It could be imposed by your ISP. If you can't get bigger packets, I'd just set the local MTU at the same number.

You may want to check the Gaming tweaks article here: http://www.speedguide.net/articles/gaming-tweaks-5812
There is also a Network Adapter optimization article linked at the bottom you may want to see.

I hope this helps

I doing that I try optimal or custom after restart open again TCP Optimizer still I see same options don't change anything.

ping google.com -f -l 1464 not fragment
ping google.com -f -l 1472 fragmented

my ipv4 mtu is 1492

I try 1440 mtu SG TCP/IP Analyzer I got the same results.