Technical data

11 Configuring Network Resources
11-8 Creating and Configuring WebLogic Server Domains
Administration Port Capabilities
An administration port provides these capabilities:
! It enables you to start a server in standby state. This allows you to administer a
Managed Server, while its other network connections are unavailable to accept
client connections. For more information on the standby state, see “STANDBY”
on page 6-5.
! It enables you to separate administration traffic from application traffic in your
domain. In production environments, separating the two forms of traffic ensures
that critical administration operations (starting and stopping servers, changing a
server’s configuration, and deploying applications) do not compete with
high-volume application traffic on the same network connection.
! It allows you to administer a deadlocked server instance using the
weblogic.Admin command line utility. If you do not configure an
administration port, administrative commands such as
THREAD_DUMP and
SHUTDOWN will not work on deadlocked server instances.
If a administration port is enabled, WebLogic Server automatically generates an
Administration Channel based on the port settings upon server instance startup.
Administration Port Restrictions
The administration port accepts only secure, SSL traffic, and all connections via the
port require authentication. Because of these features, enabling the administration port
imposes the following restrictions on your domain:
! The Administration Server and all Managed Servers in your domain must be
configured with support for the SSL protocol. Managed Servers that do not
support SSL will be unable to connect with the Administration Server during
startup—you will have to disable the administration port in order to configure
them.
! Because all server instances in the domain must enable or disable the
administration port at the same time, you configure the administration port at the
domain level. You can change an individual Managed Server’s administration
port number, but you cannot enable or disable the administration port for an
individual Managed Server. The ability to change the port number is useful if
you have multiple server instances with the same Listen Address.