wan load balancing router

message (instead of the backend server IP) and forwards it directly to the server. TCP connection is established, that is, the three-time handshake is established directly between the client and the server, the load balancer device is just a router-like forwarding action. In some deployment situations, in order to ensure that the server back-up can be correctly returned to the

, and can connect to different ISPs, enjoy more services; with dynamic and automatic load balancing strategy, backup and load balancing can be performed without manual intervention. line faults are automatically shielded/restored, and traffic is automatically re-allocated when a fault occurs. In addition to all common

application protocol (such as Http/ftp/mysql, etc.). Example: Lvs,f5.2, another is called L7,osi the highest layer, the application layer. At this point, the load balancer can understand the application protocol. Example: Haproxy,mysql Proxy.Note: Many of the load balancing devices above can do a four-tiered load or s

scalability of the LVS cluster system.compared with Vs/tun, this method does not have the overhead of IP tunneling, but requires that the load scheduler and the actual server have a NIC attached to the same physical network segment, the server network device (or device alias) does not make ARP response, or can redirect the message (Redirect) To the local socket port. ?? The advantages and disadvantages of three LVS

, the more the overall expansion capability can be improved, and the more it depends on the WAN egress bandwidth. In general, LVS-DR is suitable for building scalable Load Balancing systems, whether it is Web server, file server, and video server, it has excellent performance. The premise is that you must purchase a series of valid IP addresses for the actual de

OverviewIn our previous Windows platform distributed architecture practice-load balancing, we discussed the load balancing of Web sites through NLB (Network load Balancer) under the Windows platform and demonstrated its effectiveness through stress testing, which can be said

OverviewIn our previous Windows platform distributed architecture practice-load balancing, we discussed the load balancing of Web sites through NLB (Network load Balancer) under the Windows platform and demonstrated its effectiveness through stress testing, which can be said

OverviewIn our previous Windows platform distributed architecture practice-load balancing, we discussed the load balancing of Web sites through NLB (Network load Balancer) under the Windows platform and demonstrated its effectiveness through stress testing, which can be said

improvements, coupled with a variety of load balancing strategies, intelligent traffic management, The best load balancing requirements can be achieved.Here is a look at the market, the more mainstream of several categories of products.F5 big-IP load balancer (LTM)Big-IP pr

load balancing can be effective, then you can find a set of devices to form a virtual whole. In this whole, one is master and the others are backup. These routers use the VRRP protocol to determine the current status, backup upgrade to master, and other information. If master hangs up, select who will be the new master, which can be filtered by the priority configured by the device itself. Sum up: Through

four-layer load balancing , that is, mainly through the message of the destination address and port, coupled with the load Balancer device settings of the server selection method, determine the final choice of internal server.In the case of common TCP, the load balancer device, when it receives the first SYN request f

types of load balancing implementations are: Software-based load balancing. Software-based load Balancing includes special software that is installed on the server in a load-b

capacity , so that the cluster system accommodates more real servers. But LVS/DR needs to rewrite the MAC address of the request message, so all servers must be in the same physical network segment.3.3 ArchitectureLVS set up a server cluster system consists of three parts: the most front-end load Balancing layer (Loader Balancer), the middle of the server group layer, with server array, the lowest level of

into global IP addresses on the NAT router when communicating with the outside world. Additional Benefits of Load balancing High scalability High concurrent requests can be better addressed by adding or reducing the number of servers. (server) Health Check The load balancer can improve reliability by checking the heal

, enable NLB on the appropriate adapter, and then configure the cluster's IP address. cause : You have added the IP address of the cluster to the network adapter that is not already enabled for NLB. Solution : Remove the IP address of the cluster from the TCP/IP properties of the incorrect adapter, enable NLB on the appropriate adapter, and then configure the cluster's IP address. For more information about enabling NLB, see Installing Network

Software load Balancing is generally implemented in two ways: the implementation of soft load based on operating system and the implementation of soft load based on third party application. LVS is a kind of soft load based on Linux operating system, Haproxy is an open source

enterprise should consider the SQL Server database server performance and speed and security. However, for a long time, the SQL Server database server has only a "hot standby" solution and no "load balancing" and "cluster" solutions.With the advent of the database router software icx, a better clustering solution is provided for the MS SQL Server based database

One of Linux load Balancing software LVS (concept article) A brief introduction of LVSLVS is the short name of Linux virtual server, the Linux VM, a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now that LVS is already part of the Linux standard kernel, Before the Linux2.4 kernel, the use of LVS must be recompiled to support the LVS function module

backbone network from conventional third layer to comprehensive third-layer, fourth-layer switching function, its unique WAN integration capability and the access control based on layer fourth exchange have played a key role in secure and orderly network data transmission. In addition, Cabletron SmartSwitch router provides different levels of prioritization for specific business application data exchange b

used as MySQL, mail or other non-web load balancing, we often use it as a MySQL (read) load balancing;Four, with a strong monitoring server status of the page, the actual environment we combine Nagios Mail or SMS alarm, this is also I like it one of the reasons;Five, Haproxy support virtual host. When doing a