H3C Technologies H3C SecBlade LB Cards - Manual (Page 11)

5
Layer 7 server load balancing
Figure 5 Network diagram
Layer 7 server load balancing comprises the following elements:
• Cluster—A cluster consists of an LB product and multiple servers to provide specific services.
• LB product—A device that distributes different service requests to multiple servers.
• Server—A server that responds to and processes different service requests.
• Server group—A real service group is a logical concept. Servers can be classified into different
groups according to the common attributes of these servers. For example, servers can be classified
into static storage server group and dynamic switching server group according to their functions; or
they can be classified into music server group, video server group and picture server group
according to the services they provide.
• VSIP—Virtual service IP address of the cluster, used for users to request services.
• Server IP—IP address of a server, used by the LB product to distribute requests.