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Virtual Servers Overview
Virtual Servers in a Class
A virtual server that belongs to a class is called a member of that class. Some virtual
server settings are configured for all virtual servers in a class, and some are
configured individually. These settings are configured on the Class Manager's
Virtual Servers tab. For more information, see Chapter 14, "Creating and
Configuring Virtual Servers."
The Default Class
When you install Enterprise Server, the installer automatically creates a single
class, called
your server instance. You can add additional virtual servers to the default class, but
you cannot delete your default virtual server from the class. You also cannot delete
the default class.
Listen Sockets
Connections between the server and clients happen on a listen socket. Each listen
socket you create has an IP address, a port number, a server name, and a default
virtual server (which becomes associated with the connection group created
automatically for the listen socket). If you want a listen socket to listen on all
configured IP addresses on a given port for a machine, use 0.0.0.0, any, ANY, or
INADDR_ANY for the IP address.
When you install Enterprise Server, one listen socket, ls1, is created automatically.
This listen socket uses the IP address 0.0.0.0 and the port number you specified as
your HTTP server port number during installation (the default is 80). You cannot
delete the default listen socket. If you are not using virtual servers, this one listen
socket is sufficient. However, if you are using virtual servers, you may want to
create multiple listen sockets for your virtual servers.
Since a listen socket is a combination of IP address and port number, you can have
multiple listen sockets with the same IP address and different port numbers, or
with different IP addresses and the same port number. For example, you could
have 1.1.1.1:81 and 1.1.1.1:82. Additionally, you could have 1.1.1.1:81 and 1.2.3.4:81,
as long as your machine is configured to respond to both these addresses.
However, if you use the 0.0.0.0 or ANY IP address, which listens to all IP addresses
on a port, you cannot set up additional IP addresses that listen on the same port for
a specific IP address. For example, if you have a listen socket 0.0.0.0:80 (all IP
addresses on port 80) you cannot also have 1.2.3.4:80.
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. It contains one virtual server member by default for
defaultclass
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