How to: change and check windows mtu size as part of network troubleshooting, you may need to check or change the maximum transmission unit (mtu) on your windows machine network interface card. the mtu is the size of a network packet that can be communicated in a single network transmission.. Microsoft windows server 2003, microsoft windows 2000, and microsoft windows xp use a fixed mtu size of 1500 bytes for all ppp connections and use a fixed mtu size of 1400 bytes for all vpn connections. this is the default setting for ppp clients, for vpn clients, for ppp servers, or for vpn servers that are running routing and remote access.. Mtu is maximum transmission unit and it's the size of the biggest packet that can be sent without being fragmented. by defaultt it's set to 1500 on windows systems (and on most of other types of systems)..
I double check my neutron-dnsmasq.conf file to make sure the mtu was set at 1454, via dhcp configuration. it was. so, i checked the mtu settings on the windows image and it was in fact 1500.. On windows xp, vista and 7, click on start button and click on “run“, type “cmd” and click “ok“. on windows 8, right click at bottom left corner and select “ command prompt (admin )”. 2 type the below command and hit enter to check current mtu value .. Ping test to determine optimal mtu size on router. 41 people found this helpful in last 30 days. in windows, go to start and select run. type in cmd (windows 2000/xp) or command (windows 98/me) into the open: field. hit check the bottom or back panel of your netgear device..