Network Router User Manual

SmartSwitch Router User Reference Manual 235
Chapter 17: Web Hosting Configuration Guide
Optional Group or Server Operating Parameters
There are several commands you can specify that affect the operating parameters of
individual servers or the entire group of load balancing servers. In many cases, there are
default parameter values and you only need to specify a command if you wish to change
the default operation. For example, you can specify the policy to be used for distributing
the workload for a group of load balancing servers. By default, the SSR assigns sessions to
servers in a round-robin (sequential) manner.
Specifying Load Balancing Policy
The default policy for distributing workload among the load balancing servers is “round-
robin,” where the SSR selects the server on a rotating basis without regard to the load on
individual servers. Other policies can be chosen for the group, including least loaded,
where the server with the fewest number of sessions bound to it is selected to service a
new session. The weighted round robin policy is a variation of the round-robin policy,
where each server takes on new sessions according to its assigned weight. If you choose
the weighted round robin policy, you must assign a weight to each server that you add to
the load balancing group.
To specify the load balancing policy, enter the following command in Configure mode:
Note:
These policies only affect groups created with the parameter protocol tcp; groups
created with the parameter protocol udp are load-balanced using a fixed IP-hash
policy.
Specifying a Connection Threshold
By default, there is no limit on the number of sessions that a load balancing server can
service. You can configure a maximum number of connections that each server in a group
can service.
To specify the connection threshold for servers in the group, enter the following command
in Configure mode:
Note:
This limits the number of connections for each server in the group, not the total
number of connections for the group.
Specify load balancing policy.
load-balance set policy-for-group <group
name>
policy <policy>
Specify maximum number of
connections for all servers in the
group.
load-balance set group-conn-threshold
<group name> limit <maximum connections>