From: http://www.net42.co.uk/ OS /linux/ppp_gprs_tuning.html
MTU MRU seem to have a drastic effect on usability, but I 've not seen this discussed for GPRS.
This is just a quick note to report a drastic improvement in the usabilityOf GPRS on Linux in 2G service areas (GSM not UMTS) by setting small valuesFor PPP's MTU and MRU parameters.
I have made a quick post to the PPP BOARD ON THE phars
From: http://blog.chinaunix.net/u3/106587/showart_2112287.html
MTU is the largest transmission unit. It plays a key role in networking. If you find that some websites cannot be accessed or large files cannot be uploaded, it may be MTU.. For example, the clientPCSetMTUYes1500And the gateway allowsMTUYes1400For the length of the package1400To1500Between packages,PCDoes not take the initiative to segment (IP
destination address is your own physical hardware address, broadcast address, and the available multicast hardware address ), if yes, the frame will be handed over to"Device Driver"For further processing. At this time, the software we capture can capture data. Therefore, what we capture is to remove the leading synchronization code, the frame start delimiter, and data outside of the FCS. The maximum value is 6.+ 6 + 2 + 1500 = 1514.
According to Ethernet rules, the minimum part of the Ethernet
corrupted.
The binary packet from the line is called a frame. Frames you see from a physical line, in addition to other information, see the preamble and the frame-start character. Any physical hardware will need this information.
The table below shows the full frame format for the MTU transfer in 1500 eight-bit groups (some gigabit Ethernet or even higher-speed Ethernet supports larger frames, called Mega frames). [Note 2] a eight-bit tuple is a eig
The first time I used VPN, I purchased puff VPN, But I encountered many problems in MAC configuration. The general steps are not mentioned. Please search for them on the Internet.
If the network still fails after the correct settings, use a Windows host for testing. If windows can be used but Mac and iPhone cannot, the MTU value may be too large.
Run the following command on the MACOs terminal:
Ifconfig
Generally, the names of two NICs are en0 and
Maximum Transmission Unit
Wikipedia, a free encyclopedia
Maximum Transmission Unit(Maximum transmission unit, MTU) refers to the maximum data packet size (in bytes) that can be passed over a layer of a communication protocol ). The maximum transmission unit parameter is usually related to the communication interface (network interface card, serial port, etc ).
The Internet Protocol allows IP sharding, so that the datagram can be divide
Pppoe frame forming component
Components
Size (in bytes)
NET data load
1 ~ 1 452
TCP Header
20
IP Header
20
PPP Header
2
Pppoe Header
6
The maximum receiving unit of pppoe is 1492, the maximum load of Ethernet is 1500 ETS, The pppoe header is 6 octets, And the PPP protocol ID is 2 (before the PPP package is a two-byte PPP protocol id value) octets, so the MTU of PPP cannot e
normal! Proving not an application-level configuration exception problem! It's probably a problem with the network impact app!In view of the hardware failure when the machine, path changes, the application of SSL protocol interaction packet size anomalies, and prompted Previos fragment lead segment loss and other network problems, F5 personnel recommended to check the MTU settings, and then the customer management and network personnel to say before
Cisco IOS IPSec MTU Remote Denial of Service Vulnerability
Release date:Updated on:
Affected Systems:Cisco IOS 15.3Description:--------------------------------------------------------------------------------Bugtraq id: 63874CVE (CAN) ID: CVE-2013-6694
Cisco IOS is an interconnected network operating system used on most Cisco system routers and network switches.
A Remote Denial of Service (DoS) vulnerability exists in the IPSec Implementation of Ci
1, first open the Start menu, and then expand All Programs--attachment--command prompt, open the command window;
2. In the open window, enter the "netsh interface ipv4 show subinterfaces" command, which is used to query the MTU value of the current system;
3, then continue to enter the "netsh interface IPv4 set subinterface" local connection "mtu=1480 store=persistent" command, and then ente
Ip:ifconfigMtu:netstat-iGateway:netstat-rDns:cat/etc/resolve.confThe gateway IP will be permanently saved in the/etc/sysconfig/network-scripts/ifcfg-eth0 file.IP is modified in/etc/network/interfaces This configuration file is also permanently savedDNS is also permanently saved after modifying the/etc/resolv.conf in this configuration file.To see if the service is started you can use service name statusStart Service service name startShut down service service name stopService SSH RestartLinux ga
http://view.inews.qq.com/a/20161025A0766200QQ in narrowband eraQQ is a narrow band of the most representative of the product, in that network transmission efficiency is lower than the era, we still remember Google's homepage? Why is the simple page of Google so concise?Google was born in 1998, is also in the narrow-band era, you will find its home byte size is less than 1024, why less than 1024 bytes, because the Ethernet MTU (that is, the largest tra
1. Configure Add ip:vi/etc/network/interfaces Modify the following:# The Primary network interfaceAuto Eth0Iface eth0 inet StaticMTU 1410Address 192.168.1.100Address2 #添加多个IP地址Netmask 255.255.255.0Gateway 192.168.1.1Save, restart the NIC service networking restart or/etc/init.d/networking restart2. Modify dns:vi/etc/resolv.conf Add the following contentNameServer 114.114.114.114nameserver 114.114.115.115Permanently change DNS (do not restore after reboot):1) chkconfig NetworkManager off2) Servic
As usual, assume you're installed with fc6. make sure your yum works well, repository is set to the official URL and your list.
1) Yum install mplayer2) Yum install mplayer-Gui3) vi/etc/mplayer. confVo = SDLAo = SDL4) In control panel, set sound
This is a set of serialized articles used to record the entire process of connecting a Bluetooth handle with big eyes. I would like to use this document to give my missing sleep that week.
This article is equivalent to a (public) personal diary. Do
Ignore the level of performance? No this is the great taboo of the perfect work. The level of the image is the key to the perfect effect of the photographic works, can be divided into light and shade levels, color levels, the depth of the scene and
Super Simple 3 steps to teach you to draw a big heat of this year's diffuse shadow! If the designer wants to play good diffuse shadow, need to control the range and direction of the shadow, the interface bogey many large range of shadows, otherwise
Recently, using tcpdump to study and analyze TCP parameters, the results of the grab package under Linux at first made me wonder that Ubuntu and Debian had the same phenomenon on hand.
The specific is to catch the sender of the TCP data segment of
Nbsp; it was very exciting when Sony first announced that PlayStation3 would be able to run Linux directly. Initially, it was difficult to install Linux directly. The user-defined script of the installation programs supported by the PS3 is used to manually convert the FedoraCore5 or 6 installation DVDs into a system running with a special PS3 kernel. Person
It was exciting when Sony first announced that Pla
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