How can I fix the mtu value of the D-link router!

First, we will introduce what is the mtu value ~ The mtu value is the abbreviation of Maximum Transmission Unit, which indicates the Maximum data packet transmitted over the network. The Unit of MTU is byte.
What is the use of mtu values? When your online website cannot be opened, it is difficult to connect to the network and the link is slow. At this time, you need to fix the mtu value ~
Now let's get started. Most network devices use 1500 MTS. If the MTU of the router is larger than the MTU of the Gateway (Telecom Department), large data packets will be split and transmitted. This will produce a lot of data packet fragments, increase the packet loss rate, and reduce the network speed. Setting the MTU of A vro to a smaller or the same as the MTU of a telecom service provider can reduce packet loss. Similarly, setting the MTU of a computer to a smaller or the same as the MTU of a local router can also reduce packet loss. In general, we only need to set the MTU value of the router.
How can we detect the mtu value on the service ~
"Start" menu → "program → attachment → command prompt ":
The parameters of ping-f-l 14xx www.google.cn are described as follows:
L-l 14xx parameter: sends a fixed-length data packet. 14xx indicates the package size to be tested. In the preceding formula,-l is L in lower case (not 1 ).
*-F parameter: notifies the router not to change the data packet size without authorization.
* Www.google.cn: Any host on the Internet can also use other host names or IP addresses.
Observe the feedback results and determine the MTU value of the telecom service provider device.
L if the packet can be pinged, it indicates that the packet does not need to be split and can be sent out through the gateway.
If:
Packet needs to be fragmented but DF set.
Indicates that data packets must be split and sent. In this case, reduce the packet length and then execute the ping command above. Try the packet length several times from 1400 to 1472. Add the packet length to the packet header by 28 bytes to obtain the MTU value.
Tested, by modifying the mtu value in the vro, you can successfully resolve the problems of "cannot open web pages on QQ", "cannot open some websites or links", and "cannot log on to MSN" After accessing the Internet through the vro. (Please set MTU is 1480) and "Email attachments cannot be sent.
This is basically done ~~ Share some nice mtu values
• 1500. the maximum value of the Ethernet information package is also the default value. Is a typical setting of network connections without PPPoE and VPN. Is the default setting for most routers, network adapters, and switches.
• 1492. Optimal PPPoE Value
• 1472. Use the maximum ping value (information packets greater than this value will be split first)
• 1468. Optimal DHCP Value
• 1430. Optimal Values for VPN and PPTP
• 576. standard value for dial-up connection to ISP
Modify the mtu value of the vro (take DI-504 as an example ):

Author "computer Tips"