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Windows 7: MTU Limit - Test and change your connection's MTU limit

04 Aug 2014   #30

Windows 7 32 bit


Looking at my router, the MTU is set at 1500 but when I ran the command netsh interface ipv4 show subinterfaces, the results suggests that over the wireless connection, the MTU was 1300 (see attached screenshot). I then ran the ping command and only received successful results at 1272 i.e. ping -f -1 -1272.

Any suggestions? I've no real expertise in this area but came across the posts as I've been trying to understand why transfers to and from my ReadyNas have been so slow.


Attached Images
MTU Limit - Test and change your connection's MTU limit-mtu.jpg 
My System SpecsSystem Spec
06 Aug 2014   #31


What wireless device are you using? I think some are limited to 1300.
My System SpecsSystem Spec
06 Aug 2014   #32

Windows 7 32 bit

Thanks for getting back to me.

I have a Sky router (SR101) running to three Netgear WNDAP360 wireless access units (am connected using 2.4ghz band). I've had a look in the admin pages of the netgear wireless points and can't see any reference to setting MTU. If I can't change anything on these wireless points, is it worth setting the network to run at 1272 (i.e. 28 below the 1300 limit) or is this going to cause things to slow down even further?
My System SpecsSystem Spec
24 Jun 2015   #33

Windows 7 Home Premium 32bit
Flipkart Not open


I am MTNL Broadband User. I have 1mbps plan and I am using WIFI. My problem is is not opening in my laptop and my phone also. I tried all your steps but those steps are confusing me and I did not get resolution.

I ping with "ping -f -l 1472"
the reply got request time out. (see the attachment capture1.png )

then i entered "ping -f -l 1462"
I got reply (see the attachment capture2.png )

then I add 28 "ping -f -l 1490"
I got reply:Packet needs to be fragmented but DF set. (see the attachment capture3.png )

If you have any solution, please help me.

Thank you.

Attached Images
MTU Limit - Test and change your connection's MTU limit-capture1.png MTU Limit - Test and change your connection's MTU limit-capture2.png MTU Limit - Test and change your connection's MTU limit-capture3.png 
My System SpecsSystem Spec

31 Dec 2016   #34

98SE/XP/windows7 ultimate 32bit

1500 work fine for me
My System SpecsSystem Spec
1 Week Ago   #35

windows 10 pro

i tried it and cmd says:The filename, directory name, or volume label syntax is incorrect.
please help
My System SpecsSystem Spec

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