R3204P16-HP Load Balancing Module Load Balancing Configuration Guide-6PW101

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Figure 8 Relationship between the components of the server load balancing module
• Real service group: A group of real services.
• Real services: Entities that process services in a cluster (such as servers in Figure 1, and Figure 3,
and f
irewalls Figure 5.
• V
irtual service: A logical entity that faces users. A virtual service can correspond to multiple real
services.
Server load balancing is implemented through the following procedure: After a user sends a request to
the virtual service of the LB device, if a persistence method is specified in the virtual service, and matched
persistence entries exist, the request is distributed according to the persistence entries; otherwise, the
virtual service obtains the information of the related real service group, and then it distributes the request
to a real service in the group based on the algorithm configured in the real service group. See Table 5
f
or the introduction to the persistence method.
Configuration task list
Perform the tasks in Table 1 to configure server load balancing.
Table 1 Server load balancing configuration task list
Task Remarks
Configuring global parameters
Allows you to enable the saving of the last hop information and
unidirectional traffic detection.
The saving of the last hop information must be enabled on a level 2 LB
device in firewall load balancing, and unidirectional traffic detection
must be enabled on an LB device in DR server load balancing. This task
is optional in other cases.
By default, the saving of the last hop information function and
unidirectional traffic detection function are disabled.
Creating a real service group
Required
Allows you to create a real service group, and configure the real
service group parameters.
By default, no real service group exists in the system.
Creating a real service
Required
Allows you to create a real service and add the real service to the real
service group.
By default, no real service exists in the system.