TCP/IP Protocol

This appendix describes the format of a listen address when the protocol between two machines is TCP/IP. It also gives you the protocol- and platform-specific information to set up connection data entries.

Listen Address Format

A listen address is a unique identifier used for interprocess communications. A Communications Server has two kinds of listen addresses. It uses one to receive messages from local processes and the other to receive messages from remote Communications Servers.

This section describes the format of the listen address used to receive messages from remote processes when the network protocol is TCP/IP.

Note: To view or change your instance's listen addresses, use the Configuration-By-Forms (cbf) utility or Configuration Manager (vcbf).

When you install Ingres Net on a machine that is using the TCP/IP protocol, the listen address has two possible formats, as follows:

ax[n]

or

ppppp

where:

• a

  Is an alphabetic character (case is not significant)

• x

  Is an alphabetic character or a decimal digit (0-9)

• n

  Is a numeric digit from 0 - 7, inclusive

• p

  Is a numeric digit. The range depends on your operating system. For specific details, see your operating system documentation.

The format ax[n] is the default format, where ax is the installation ID (found in II_INSTALLATION) and n = 0. The digit n is incremented by 1 for each successive Communications Server started in an installation. For example, if the installation has three Communications Servers using the default format for their listen addresses, the addresses are ax0, ax1, and ax2.

Network Address Format

The network address in a TCP/IP environment has the following format:

host_name | ip_address

where:

• host_name

  Is the name of the remote node in character form

• ip_address

  Is the internet address of the remote node in the following format:

  For IPv4: d.d.d.d (For example: 123.45.67.89) dotted decimal

  For IPv6: x:x:x:x:x:x:x:x (For example: fe80::208:dff:fe7c:fecd%3) colon-hexadecimal

Connection Data Entry Information

Windows

Protocol: wintcp or tcp_ip

Network Address: See Network Address Format.

Listen Address: See Listen Address Format.

UNIX

Protocol: tcp_ip

Network Address: See Network Address Format.

Listen Address: See Listen Address Format. 

VMS

Protocol: tcp_wol | tcp_dec

• Use tcp_wol if the protocol between the two machines is Wollongong TCP/IP or Multinet TCP/IP when running in Wollongong emulation.
• Use tcp_dec if the protocol between the two machines is TCP/IP Services for OpenVMS or Multinet TCP/IP when running in TCP/IP Services emulation.

Network Address: See Network Address Format.

Listen Address: See Listen Address Format.

MVS

When you install Ingres Net on an MVS machine using the TCP/IP protocol, the listen address is stored in the IGWFPSVR macro:

INSTALL = xx
TYPE = tcp_ibm | tcp_knet | tcp_sns
PORT = ax[n] | ppppp

where:

• xx

  Is the installation ID

• tcp_ibm

  Is the Ingres keyword indicating the IBM TCP/IP protocol

• tcp_knet

  Is the Ingres keyword indicating the KNET TCP/IP protocol

• tcp_sns

  Is the TCP/IP protocol for SNS TCP/IP

• ax[n] ppppp

  Is the listen address

Connection Data Entry Information:

Protocol: tcp_ibm | tcp_knet

Network Address: See Network Address Format.

Listen Address: See Listen Address Format.