Shulou(Shulou.com)06/01 Report--

The purpose of this article is to share with you the content of the example analysis of dual-computer redundancy configuration and full redundancy in F5 load balancing. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Serial heartbeat dual-computer redundancy mode

The two F5 BIGIP are connected through the serial port with its own serial line (this serial line is shorter). Each F5 BIGIP monitors the status of the peer equipment through the serial heartbeat line.

In the structure of serial heartbeat, the dual-computer switching process is as follows:

1. The Active device is responsible for generating a high level on the heartbeat line.

2. The Backup device monitors the high level of the opposite end.

3. When the Backup device listens that there is no high power level at the opposite end, convert yourself to an Active device

4. Backup devices send ARP broadcasts, broadcasting all VS and floating IP to the outside, indicating that these addresses are on their own side, causing network traffic to switch.

In the serial heartbeat line of BIGIP, the level mode is mainly used to notify and monitor the status of the peer, and there is no data signal transmission in the serial heartbeat line.

This is also the redundancy recommended by F5.

Second, network heartbeat dual-computer redundancy mode

2. Set Floating IP and Failover Peer IP addresses

4. Configure FailOver: System---System Fail-safe

F5 BIGIP monitors the key processes of FailOver. When the process fails to respond or cannot start, it will trigger BIGIP handover.

In BIGIP design, some important processes are strictly monitored. Once the monitoring system finds that these important processes produce abnormal conditions. The situation at that time can be dealt with through pre-set actions. These processing methods include switching to backup BIGIP, restarting failed BIGIP, restarting abnormal processes, not doing processing, and so on.

4. Full redundancy commonly used in practice

1. Network diagram:

2. Advantages and disadvantages:

This method has good scalability, and the ports can be expanded infinitely through the stack of L2 switches, which can provide a good number of ports for a large number of servers in the background to achieve load balancing.

If a gigabit expansion switch with good performance is used, it can provide load balancing for a large number of servers on the premise of ensuring the speed and quality of network connection, thus greatly improving the concurrent connection processing of application services and providing response speed of application services.

However, this deployment method also has some shortcomings, and the deployment cost is high. If all servers use gigabit network cards, relatively high-end gigabit switches are needed to avoid the decline of network efficiency, such as packet loss caused by the inadaptability between low-end layer 2 and layer 3 switch ports and server network card ports.

Expanding the switch can increase the number of background server farms of load balancing and improve the processing capacity of concurrent connections, but it can not improve the processing capacity of network traffic. On the contrary, if the number of background server farms is too large, the expansion switch often becomes the bottleneck of the network, which further requires the expansion switch to be a full gigabit port in order to achieve port bundling when the network traffic is too large. Through the Trunk way to connect with the BIGIP3400 of the superior, to improve the processing capacity of network traffic.

Thank you for reading! This is the end of the article on "example Analysis of dual-computer redundancy configuration and full redundancy in F5 load Balancer". I hope the above content can be helpful to you, so that you can learn more knowledge. If you think the article is good, you can share it for more people to see!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.