simulate packet loss

1 Introduction to Analog delay transferNetem and Tc:netem are a network emulation function module provided by Linux 2.6 and above kernel versions. The function module can be used to simulate complex Internet transmission performance in a well-performing LAN, such as low bandwidth, transmission delay, packet loss and so on. Many distributions of Linux with Linux 2

1 Introduction to Analog delay transmission Netem and Tc:netem are a network emulation module provided by the Linux kernel version 2.6 and above. This function module can be used to simulate complex Internet transmission performance in a well performing LAN, such as low bandwidth, transmission delay, packet loss, and so on. Many distributions Linux that use the L

lower layer. If pending is returned, release our mypacket in ptsendcomplete; otherwise, the mypacket will be released immediately in this function. 3. When the lower-level miniport driver sends mypacket, it will call ndismsendcomplete 4. NDIS then calls passthru's ptsendcomplete. In this function, we should release mypacket and notify the upper-layer protocol driver to release their packet. Packet

Bandwidth or flow rate unit: Kbps Kbyte/sec Kilobytes per second Mbps Mbyte/sec Megabytes per second Kbit Kbits/sec Mbit Mbits/sec 1 , Analog Delay Transfer# TC Qdisc Add dev eth0 root netem delay 100msThis command sets the transmission of the eth0 NIC to a delay of 100 milliseconds to send.In a more realistic case, the delay value will not be so accurate, there will be a certain flu

UDP (packet length, packet collection capability, packet loss and process structure selection)UDP Packet Length: the theoretical length of a UDP packet What is the theoretical length of udp data packets and what is the proper udp

good.Internet programming is different because routers on the Internet may set the MTU to a different value. If we assume that the MTU is sending data to 1500来, and the MTU value of a network passing through is less than 1500 bytes, then the system will use a series of mechanisms to adjust the MTU value so that the datagram can reach its destination smoothly. Because the standard MTU value on the Internet is 576 bytes, it is best to use UDP data-length controls within 548 bytes (576-8-20) for U

between two routers, regardless of packet length or link transfer rate. queue delay and packet loss Queue Delay ratio LA/R is called flow intensityIf la/r >1, the average rate at which the bit arrives in the queue exceeds the rate at which the queue is transferred, the increase in the queue tends to be unbounded, and the queuing delay tends to be infinite. The

in front of the Libpcap capture packet, especially in the gigabit network conditions, a large number of drops, online search for a long time, probably all Pf_packet +mmap,napi,pf_ring and other methods, I pf_ring+libpcap experiment, The detection of gigabit network conditions, capturing the performance of the packet is very good, almost no packet

For an online chat window provided by slice, use httpanalyzer to analyze the packet sent by the window, and then simulate the packet to send the message. The headers obtained through the software are as follows: We can get the post address through the header:/chats/sendmessage. ashx page, and then cookie. The data of post is as follows: For example, the

expected ID, it is determined that packet loss occurs. The packet loss ID is sent back to the server. When the server receives a packet loss response, it resends the lost packet. It i

This is a BDP test in rhca, which is also a very common simulation of latency and packet loss. I will share it with you now. We also use the application software to test TCP/UDP comparison. When we test the impact of BDP on TCP/IP, we all need some network latency and packet loss simulation, many commercial software ca

I don't know how to say it. In short, the boat, from the mouth, I can not see HUANGFA and impoverished! I'm not going to say anything except cursing!Prior to BBR, there are two kinds of congestion control algorithms, based on packet loss and delay-based, regardless of which is based on detection, in other words, packet loss