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Chapter 12: Web Hosting Configuration Guide
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:
Specify maximum number of
connections for all servers in the
group.
Note:
This limits the number of connections for each server in the group, not the total
number of connections for the group.
Verifying Servers and Applications
The IA automatically performs the following types of verification for the attached load-
balancing servers:
•
Verifies the state of the server by sending a ping to the server at 5-second intervals. If
the IA does not receive a reply from a server after 4 ping requests, the server is
considered to be down.
•
Checks that an application session on the server can be established by doing a simple
TCP handshake with the application on the configured physical port of the server at
15-second intervals. If the IA does not receive a reply from the application after 4 tries,
the application is considered to be down.
You can change the intervals at which pings or handshakes are attempted and the number
of times that the IA retries the ping or handshake before considering the server or
application to be down. You can change these parameters for al servers in a load-balancing
group or for specific servers.
You can change the ping intervals and the number of retries by entering the following
Configure-mode commands:
Set ping interval for all servers in
specified group.
Set ping interval for specific
server.
Set number of ping retries for all
servers in specified group.
Set number of ping retries for
specific server.
198
load-balance set group-conn-threshold
<group name>
limit
load-balance set group-options
name>
<seconds>
ping-int
load-balance set server-options
<seconds>
ping-int
load-balance set group-options
name>
ping-tries
load-balance set server-options
<number>
ping-tries
Internet Appliance User Reference Manual
<maximum connections>
<group
<ipaddr>
<port number>
port
<group
<number>
<ipaddr>
<port number>
port
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