DoBroadcast Communication Parameter [DBROAD]

Usage

TCP/IP (all platforms)

ALL, NONE, DIRECT (client side)

YES, NO (server side)

ALL

Client usage – with DoBroadcast=ALL (formerly DoBroadcast=YES) a broadcast is performed to search for a server. The broadcast goes first to the local subnet. If HOST= is specified, broadcast packets are also sent to each of the hosts. For TCP, all broadcast packets are UDP packets.
With DoBroadcast=DIRECT (formerly DoBroadcast=NO), no broadcast is performed to the local subnet to search for a database server. Broadcast packets are sent only to the hosts listed in the HOST (IP) communication parameter. If you specify DoBroadcast=DIRECT, the HOST (IP) communication parameter is required.
Specifying DoBroadcast=NONE causes no UDP broadcasts to be used. A TCP/IP connection is made directly with the HOST/PORT specified, and the server name is verified. With TCP/IP, you can choose not to verify the server name by setting the VerifyServerName (VERIFY) communication parameter to NO. The HOST (IP) communication parameter is a required parameter, while the ServerPort (PORT) communication parameter is optional.
DIRECT and NONE, you must specify the server host with the HOST option.
Server usage – setting DoBroadcast=NO prevents the database server from broadcasting to find other servers with the same name. This is useful in certain rare circumstances, but is not generally recommended.

The following command starts a client without broadcasting to search for a database server. Instead, the server is looked for only on the computer named silver.
```
dbisql -x tcpip(DOBROADCAST=DIRECT;HOST=silver) iqdemo
```
On UNIX, the options must be enclosed in quotation marks:
```
dbisql -x "tcpip(DOBROADCAST=DIRECT;HOST=silver)" iqdemo
```