Multicast communication
is used to communicate among SAS middle-tier applications in a single
SAS deployment (the set of applications connected to the same SAS
Metadata Server). When installation is performed with the SAS Deployment
Wizard, the wizard generates a default multicast address that is based
on IP address of the SAS Metadata Server. The combination of multicast
address and multicast UDP port number must be different for each SAS
deployment and also different from any other multicast applications
at your site.
The multicast communication
includes all the information that is needed to bootstrap the SAS middle-tier
applications. Because this information includes the SAS environment
credentials (such as the sasadm account name and its password), time
to live (TTL) and encryption options are provided to secure the multicast
communication.
Multicast
options are specified as JVM options. Multicast options provide the
ability to tune and change the behavior of the multicast communication
that occurs within the SAS deployment. The multicast address and UDP
port number must match the values in the Web application server's
start-up script (for example,
SASServer1.bat)
and the environment.properties file located in the
SAS-config-dir\Lev1\Web\Applications\RemoteServices directory.
Administering multicast
options typically involves the following:
-
setting options such as the multicast
address
-
configuring security with a multicast
authentication token
-
configuring the bind address that
is used for multicast communication