The CSE supports two forms for the MD and RDS names: a short name and an extended name. When using the short name, the same name is used for IP address and port number lookup. The extended name, <host name>/<service name>, uses the <host name> for IP address lookup and the <service name> for a port number lookup. <name>/<name> is equivalent to the short form of <name>.
We recommend that you do not use short names because it requires more complicated network administration procedures.
The CSE components with graphical user interfaces include separate entry fields for the hostname and service name entries. You can replace the host name with an IPv4 or IPv6 address and can replace the service name with a port number.
The CSE components concatenate the hostname and service name into a single entry that other non-GUI components use. This concatenation is the extended name form. The CSE supports the following extended name forms:
Specifies a simple hostname, a fully qualified hostname, or an IPv4 address.
Specifies a simple hostname, a fully qualified hostname, or an IPv6 address. Enclosed in square brackets.
Specifies a service name or a port number
When your network uses DNS, use the extended format for the MD name and RDS name. <host name> can be any name the CSE can resolve through the DNS or local hosts file. The CSE uses system libraries to interpret host name and IP address values and can accept any values that the system supports. Include square brackets with IPv6 addresses.
The <service name> can be any name that is defined in the services file or a decimal port number.
The extended name format simplifies network configuration by allowing you to select MD names that do not have the same name in the hosts and services files. For example, you could choose to establish the convention of providing csemd and cserds entries in the services file on every system that has the CSE client or server components that are installed, and identify every MD in your network by the name system/csemd. After installing the CSE on newsystem, everyone in the network can immediately reach that CSE by using the extended name newsystem/csemd. You can use the extended format anywhere that csemd and cserds are the default TCP/IP communications names.
Using the extended name relieves the network administrator from having to assign aliases to system names and to port numbers in all systems in a network for each new MD added to the network. We recommend that you use service names instead of port numbers to simplify network administration.
TCP/IP services also include a local loopback feature to use in simple CSE configurations. The loopback feature uses a more efficient protocol for inter-process communications for programs in the same computer. This reduces overhead in the system for Message Dispatcher to server communications.
The CSE Client to the Message Dispatcher communication uses the normal TCP/IP protocol stack. To use this feature, specify localhost as the hostname when running cse_config. The MD Name is localhost/<cse_port> on the CSE servers system. When running the CSE clients on other workstations, use the CSE server system hostname that is defined in the DNS, not localhost.
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