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Chapter 4: Configuration
3.
Specify interfaces to the VLANs you just created and assign address-netmask values
to each interface.
The following commands create the interface 'if-internal' with the address-netmask
10.1.1.1/24 for the vlan 'internal' and the interface 'if-external' with the address-
netmask 207.135.89.1/24 for the vlan 'external':
ia(config)# interface create ip if-internal address-netmask 10.1.1.1/24 vlan
internal up
ia(config)# interface create ip if-external address-netmask 207.135.89.1/24 vlan
external up
Note:
In the above commands, the 'up' option enables the interface.
4.
Create a group of load balancing servers and define a virtual IP for the group:
The following load-balance command creates the group called 'www.ctron.com' with
a virtual IP address of 207.135.89.16:80 for TCP traffic:
ia(config)# load-balance create group-name www.ctron.com virtual-ip 207.135.89.16
virtual-port 80 protocol tcp
5.
Add the servers to the group.
The following load-balance command adds the hosts 10.1.1.2 and 10.1.1.3 to the group
'www.ctron.com':
ia(config)# load-balance add host-to-group 10.1.1.2-10.1.1.3 group-name
www.ctron.com port 80
Server and Application Verification
The IA automatically performs the following types of verification for the attached load
balancing servers/applications:
•
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 four 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 four
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 all servers in a load
balancing group or for specific servers.
38
Internet Appliance 1100/1200 Getting Started Guide
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