Net8 Administrator's Guide
Release 8.1.6

Part Number A76933-01

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Protocol Addresses

A network object is identified by a protocol address. When a connection is made, the client and the receiver of the request (listener, Oracle Names server, or Oracle Connection Manager) are configured with identical protocol addresses.

The client uses this address to send the connection request to a particular network object location, and the recipient "listens" for requests on this address, and grants a connection based on its address information matching the client information.

This appendix includes the following sections:

ADDRESSes and ADDRESS_LISTs

Protocol address are comprised of ADDRESS and ADDRESS_LIST elements:

ADDRESS 

Purpose: 

Defines a protocol address. This parameter may be embedded under ADDRESS_LIST or DESCRIPTION. A DESCRIPTION is typically only used in a tnsnames.ora or listener.ora file.

See Also: Each protocol has its own required parameters needed in the address, as explained in "Protocol Parameters"

Example: 

(address=
 (protocol=tcp)
 (host=sales-pc)
 (port=1521))
 

ADDRESS_LIST 

Purpose: 

Defines a list of addresses that share common characteristics.  

Example: 

 (address_list=
  (load_balance=on)
  (address=
   (protocol=tcp)
   (host=sales-pc)
   (port=1521))
  (address=
   (protocol=tcp)
   (host=hr-pc)
   (port=1521)))
 (address_list=
  (address=
   (protocol=tcp)
   (host=finance-pc)
   (port=1521)))
 

Protocol Parameters

The listener, Oracle Names server and Oracle Connection Manager are identified by protocol addresses. The table below describes the parameters used by the supported Oracle protocols:

Protocol  Parameter  Description 

All 

PROTOCOL 

Indicates the type of network on which the TNS-based application resides 

Bequeath 

PROGRAM 

Identifies the Oracle8i executable 

Bequeath 

ARGV0 

Identifies the service name 

Bequeath 

ARGS 

Identifies the source of the connection (local client) 

IPC 

KEY 

Indicates a way of identifying the server. Oracle Corporation recommends using the name of the service 

Named Pipes 

SERVER 

Indicates the name of your Oracle8i server computer  

Named Pipes 

PIPE 

Indicates the pipe name you use to connect to your server (the same PIPE keyword you specified on server with Named Pipes). This name can be any arbitrary name. 

LU6.2 

LU_NAME 

Identifies the Oracle8i server; must be a fully-qualified name 

LU6.2 

LLU or LOCAL_LU 

Identifies the local LU alias. This parameter cannot be used with LLU_NAME 

LU6.2 

LLU_NAME or LOCAL_LU_NAME 

Specifies the local LU name; must be a fully qualified name. This parameter cannot be used with LLU. 

LU6.2 

MODE or MDN 

Identifies the log mode entry of the LU6.2 network; the value is typically ORAPLU62 

LU6.2 

PLU or PARTNER_LU_NAME 

Identifies the Oracle8i server; must be a fully qualified name.This parameter cannot be used with PLU_LA. 

LU6.2 

PLU_LA or PARTNER_LU_LOCAL_ALIAS 

Identifies the partner LU alias of the Oracle8i server. This parameter cannot be used with PLU. 

LU6.2 

TP_NAME or TPN  

Identifies the transaction program name of the host machine. This parameter is not required for a connection to an MVS host. 

SPX 

SERVICE 

Defines the name of the TNS-based application on the network 

TCP/IP and TCP/IP with SSL 

HOST 

Identifies the host name or IP address of the machine 

TCP/IP and TCP/IP with SSL  

PORT  

Identifies the host name of IP address of the machine 

Recommended Port Numbers

Oracle Corporations recommends the following port numbers:

Port  Description 

1521 

Default listening port for client connections to the listener. In future releases, this port number may change to the officially registered port number of 2483 for TCP/IP and 2484 for TCP/IP with SSL. 

2481 

Recommended and officially registered listening port for client connections to the Oracle8i JServer option using TCP/IP 

2482 

Recommended and officially registered listening port for client connections to the Oracle8i JServer using TCP/IP with SSL 

2484 

Recommended and officially registered listening port for client connections to the listener using TCP/IP with SSL 

1575 

Default and officially registered listening port for client connections to an Oracle Names server using TCP/IP or TCP/IP with SSL 

1630 

Default and officially registered listening port for client connections to Oracle Connection Manager 

1830 

Default and officially registered listening port for administrative commands to Oracle Connection Manager 

Port Number Limitations

Oracle Corporation allows port numbers from 1 to 65535. Port numbers below 1024 are reserved for use by privileged processes on many operating systems.

If your listener is configured to use a port number below 1024, you will not be able to start it using LSNRCTL utility. LSNRCTL, even if itself running as root, cannot start the listener as root (on UNIX systems), however, you can always run listener executable (tnslsnr) as a root. This can be done by entering the command tnslsnr listener_name at the operating system prompt. Note that after the listener has been started it can be further administered (including stopping it) by LSNRCTL utility.


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