qos ppt

Transferred from: http://www.aiweibang.com/m/detail/104476372.html?from=pWith the gradual popularization of WEBRTC standard, real-time audio and video communication technology has been paid more and more attention by companies and technicians. For interactive audio and video applications, stability, low latency, and clear and reliable call quality are the basic requirements. In the Internet environment, the quality of voice and video communication is related to the following factors: first, enco

sch_direct_xmit to directly send the sk Sch_direct_xmit first calls qdisc_unlock to release the qdisc root lock, calls supervisor to send SKB through the driver, and then determines the return value. If it is netdev_tx_ OK, it returns the qdisc queue length of qdisc_qlen. If it is netdev, I will not go into details here. If netdev_tx_busy is returned, call dev_requeue_skb to re-import the SKB to the queue. Traffic control also supports control of inbound packets. The kernel calls netif_receive

Copyright Notice: original works, allow reprint, reprint, please be sure to hyperlink form to indicate the original source of the article, author information and this statement. Otherwise, legal liability will be held. http://yutianxuan.blog.51cto.com/481756/100348 More and more routers are bringing this function of QoS. As Network management personnel. The word QOS has more and more appeared in

The Quality of Service (QoS) is a network-attached program specifically for Windows XP Professional users, and the system defaults to calling this program when you install Windows XP. For individual users or campus network users, this program is not practical significance, but also occupy network bandwidth, so it is best to prohibit the system to call the program. To completely disable the QoS program and r

IP QoS Overview 1. Related Protocols [RFC 2474] definition of the differentiated services field (DS field) in the IPv4 and IPv6 Headers[RFC 2475] an architecture for Differentiated Services[RFC 2597] Assured Forwarding PHB Group[RFC 2598] an expedited Forwarding PHB[RFC 2836] per hop behavior identification codes 2. dscp (Differentiated Services codepoint) distinguishes service encoding points In the IPv4 packet header, dscp is the first six bits in t

----------------------------------------------------- Define mppp and insert it into muppp group 1Ppp multilinkPpp multilink group 1!Interface Serial0/1/0Description IPLC to HQ S0/1/0 China CNC # L2025131Bandwidx 1984Ip address 10.254.251.2 255.255.255.252Ip accounting output-packetsEncapsulation pppLoad-interval 30Ppp multilinkPpp multilink group 1 After completion, it will be accompanied Router VPN 10Network 10.254.250.0 0.0.3Network 10.254.250.4 0.0.0.3Network 10.254.251.0 0.0.3Network 192.1

H3C 7503E Qos configuration instance # define two ACLs and two data streams respectively. permit and deny have no effect, only define the data stream acl number 3000 rule 0 permit ip source 192.168.119.0 0.0.0.255 destination 192.168.108.18 0.0.0.0acl number 3001 rule 0 permit ip source 192.168.119.0 0.0.0.255 destination 192.168.108.0 0.0.255 # definition class, introduce acltraffic classifier permit if-match acl 3000 traffic classifier deny if-match

Network Performance Network performance refers to the ability of the network or part of the network to provide inter-user communication mechanisms, and is the basis for ensuring QoE and QoS requirements. KPI Key Performance Indication (KPI)Key performance indicatorsIt is usually an important parameter that can be monitored and measured at the network layer. KQI KQI (Key Quality Indicators) isKey Quality IndicatorsIt is a service quality parameter

Internet Café Router QoS settings are mainly to ensure that every day the machine can have bandwidth, so as to ensure the stability and balance of internet cafes. The Internet Café Router QoS has two most important parts, namely the minimum bandwidth and the maximum bandwidth. Minimum bandwidth can be understood to be guaranteed bandwidth; Maximum bandwidth: When the network is idle, you can fully use th

Linux gateway traffic control (Qos)-Linux Enterprise Application-Linux server application information. The following is a detailed description. Iptables + TC for traffic control the following is the Qos settings of a linux gateway in our subsidiary. Using iptables and TC, we feel that the effect is very good. Instance 1: Traffic control: Eth0 is connected to the Intranet on the firewall, and eth1 is co

Liangzhao Zeng, Boualem benatallah, et. al. QoS-aware middleware for Web Services Composition, tose, 2004 This is an extended version of www03. The content of the two papers is similar, but it is clearer and clearer in many places than that written in www03 (after all, it is written on tose ).Article).1. This article introduces middleware agflow that supports QoS driven Web service composition. The main

Original from: http://blog.chinaunix.net/u/9284/showart.php?id=220696 use TC for flow control (Qos) (2006-12-13) Kang Daoyu Objective: I see the network on the Linux system flow control article a lot of not practical, even if the reference can not quickly write traffic control rules, and there are many errors. I have also written an article, is a lot of web sites cited, thanks to my support, I put an example to write out for everyone to reference

This article explains the mechanism of Ioband The Ioband principle is simple: the Ioband device sets many group, each group has its own weights and thresholds, and Ioband drives QoS control for these group IO requests. Ioband devices are controlled based on token, and different token are allocated according to group weights. The strategy also includes the request based and sector based token control Dm-ioband involves several important data structures

During Enterprise O M, we often find that the traffic increases in some cases when synchronizing data with some or the same server. To ensure the normal operation of the network, we can actually use the QOS provided by windows to limit the bandwidth used during synchronization. Here I will share the following operations: 1. Open the Group Policy on the server that needs to set QOS, start-run-gpedit. msc2.

Application descriptionPurpose: Enable NAT and QOS at the same time on AR1830. The data stream sent from PC1 is defined as 5 with a Gold priority. at least 50% of the ADSL bandwidth must be guaranteed; data Streams sent from PC2 are defined as multimedia (priority 3). At least 20% of the ADSL bandwidth must be guaranteed; Network Management (Priority 7) must ensure 10% of the bandwidth, but when the network is not busy,Each data stream can exceed the

Cisco's QoS speed limit and h3c a little difference, but overall, h3c of the comparison slag, the unit is not the same, the H3C car unit is KPBS, and the Cisco Police speed limit unit is bits per SECONDS,H3C this skipped. The theory of the token barrel is not verbose.Configure the QoS speed-limiting process on the ASA as follows:Steps:Step 1: Create ACLs to match streamsAccess-list rate_limit_lan-2 Extended