voip packet loss

Compile and install the NIC Driver in linux (NIC packet loss)-Linux Enterprise Application-Linux server application information. The following is a detailed description. Install and compile the NIC Driver In the past two days, I found that the packet loss of a server is very serious. The snmp package can be obtained wh

Recently, my company thought it was a network problem or a data center problem when a packet loss problem occurred on its website. after a long time of troubleshooting, I found that the linux network card was out of the package. Let's share my solution. In the past, the company's system often experienced packet loss du

Let's start by recognizing what a packet loss is, and what kind of phenomenon is being lost to the network: Data is transmitted on the Internet on a packet-by-unit basis, with a packet of NK, no more, no less. That is to say, no matter how good the network line is, how strong the network equipment, your da

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

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 Linux 2.6 (or above) version of the kernel fea

LibPcap packet loss problem-Linux Enterprise Application-Linux server application information. The following is a detailed description. Author: Yu Zhu During this time, we checked the high packet loss rate of LibPcap. Many people mentioned this on the internet, but they always suspect that their problems are different

Https://www.tuicool.com/articles/7ni2yyr Recently work encountered a server application UDP lost packet, in the process of checking a lot of information, summed up this article for more people's reference. Before we begin, we'll use a diagram to explain the process of receiving a network message from a Linux system. First of all, network packets sent through the physical network to the NIC driver will read the message in the network into the ring buf

Previously, we talked about libpcap packet capture, especially in the case of a gigabit network, which results in a large number of packet loss and a long time of searching on the Internet. This is probably a method like PF_PACKET + MMAP, NAPI, and PF_RING, I tested PF_RING + libpcap and found that the packet capture p

connection without packet loss. Then, I directly access and operate the sales system on the workstation in the Central Data Center. Everything is normal, it indicates that the network of the sales server and the central data center is normal. Is there a network problem at the sales office? Try to restart the switch at the sales office and test that the fault still exists.Are all computers in the sales offi

The out-of-order and packet loss of Java Datagram-general Linux technology-Linux programming and kernel information. The following is a detailed description. Accustomed to TCP programming, it is wrong to think that UDP can handle these problems. A udp application must take full responsibility for reliability, including packet

Resolve network packet loss problems in linuxRecently, I encountered problems in my business. I found that the value of overruns is constantly increasing. I learned some related knowledge.It is found that the number is constantly increasing. G, I found that the meanings of these errors, dropped, and overruns are not the same.Eth2 Link encap: Ethernet HWaddr 00: 8C: FA: F1: DA: 78Inet addr: 10.249.2.112 Bcas

Problem DescriptionWhen you use a vro to access the Internet, the network speed is slow or unstable, and packet loss occurs on the ping Internet, as shown in the figure below:Ping packet loss is generally caused by physical connection quality or line congestion. We will analyze and troubleshoot the factors that are mos

This article mainly uses an example to explain in detail how to solve the packet loss problem caused by CISCO router faults? The following article gives me a detailed answer. Recently, some people in my department (Department A) reported that they could not access the network of the higher-level department (Department B. I use the ping command from the computer A1 (IP Address: 10.20.12.11/24) used by this p

H264 video packet loss is inevitable during transmission in the group network, especially when the network environment is poor, transmission of h264 code streams, packet loss will lead to the decoding terminal screen, mosaic is serious, this cutting-edge technology is FEC, NACK, the former is the forward correction tec

Summary of delay commands for simulating packet loss in centosSummary of delay commands for simulating packet loss in linux:First, run the ifconfig command.1. Set latencyLatency: sudo tc qdisc add dev eth0 root netem delay 30 msLatency in the range (10-50 ms): sudo tc qdisc add dev eth0 root netem delay 30 ms 20 msSet

to the client to perform network debugging two months ago. Its Internet cafe covers an area of more than seven hundred square meters and has 120 machines. It is equipped with a dedicated data center and is equipped with switches and servers. I took my laptop to its dedicated data center. The first step was to test the telecom terminal, connect the portable device to the photoelectric converter, configure the portable device with an IP address, ping the telecom DNS, and then call the data center

H3C s5500 is the core and is linked to the s3100 of adjacent buildings. The user reports that the client network in 3100 is unstable. Link mode (5500) network cable (3100 MB photoelectric conversion) optical fiber to adjacent building (MB photoelectric conversion) network cable) First Ping, occasionally packet loss of 3%-5%, and occasionally good .. Strange Check whether the ports 3100 and 5500 are config

whether there is any traffic exception. Network Traffic Analysis Process 1. Overall Network Traffic Monitoring We first use the History Samples historical sampling function of Sniffer Pro to monitor the network utilization on the image link. The following results are obtained: Link to utilization The link actually transmits numbers per second. From the above monitoring results, we can see that in every 40 seconds, the network traffic in this link will peak for 15 seconds, and it is very reg

Cause Analysis of UDP packet loss in linux kernel 1. UDP checksum and error phenomenon: you can use netstat-su to view UDP error packets. Tcpdump packet capture: enable the captured udp packet in wireshark and enable the checksum option. Solution: Find Link faults www.2cto. com2, firewall... cause analysis of UDP

# throughput = byte CNT/Time Interval # Time Interval = cur_time-start_timebegin {# program initializeinit = 0; I = 0 ;} {Action = $1; time = $2; from = $3; To = $4; type = $5; pktsize = $6; flow_id = $8; src = $9; DST = $10; seq_no = $11; packet_id = $12; if (Action = "R" from = 2 to = 3 flow_id = 2) {pkt_byte_sum [I + 1] = pkt_byte_sum [I] + pktsize; If (init = 0) {start_time = time; init = 1;} end_time [I] = time; I = I + 1 ;}}end {# when read over, start to calculateprintf ("%. 2f \ t %.