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Copyright © 2000 - 2005 KEMP Technologies, Inc. All Rights Reserved.
1. Home
An introduction page.
2. Virtual Services
A list of virtual services on the balancer, summarizing the properties of each and giving the options to modify
or delete services, or create a new service.
2.1. Add Virtual Service
Here the Virtual IP (VIP) address, port and protocol are defined. The VIP address and port must be typed
manually into the text fields and the protocol is selected from the pull-down list.
2.2. Virtual Service Properties
Here the properties of the virtual service are set, and the real servers are added (or removed).
Activate or Deactivate Service
This checkbox gives you the option to activate or deactivate a virtual service. The default is checked - active.
Service Check for the Virtual Service
This provides a list of checks for well-known services, as well as lower level checks for TCP/UDP or ICMP. With
the service checks, the real servers are checked for the availability the selected service. With TCP/UDP the
check is simply a connect attempt.
The following health-check methods may be specified.
http Http checking is enabled
https Https (SSL) checking is enabled
smtp The (simple mail transfer protocol) is used.
nntp The (network news transfer protocol) is used.
ftp The (file transfer protocol) is used.
telnet The (telnet protocol) is used.
pop3 The (postoffice – mail client protocol) is used.
imap The (imap – mail client protocol) is used.
tcp A basic TCP connection is checked.
dns A DNS request is sent to the Real Servers port. This checking method is only valid when using
a UDP protocol.
udp A dummy zero length UDP packet is sent to the port.
icmp An ICMP ping is sent to the Real Server.
Service nickname
This text field allows you to assign a nickname to the Virtual Service being created, or change an existing one.
Content Switching and Persistence Options
This section allows you to select whether persistence is enabled for this service, to set the type of persistence
and the persistence timeout value, and to enable or disable content switching.
If persistence is enabled it means that a client connection to a particular real server via the balancer is
persistent, in other words the same client will subsequently connect to the same real server. The timeout
value determines for how long this particular connection is remembered.
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