| Summary information | |
|---|---|
| Default value | 0 | 
| Valid values | 0, or 1024–65535, or system limit | 
| Status | Dynamic | 
| Display level | Comprehensive | 
| Required role | System Administrator | 
The syb_sendmsg port number parameter specifies the port number that Adaptive Server uses to send messages to a UDP (User Datagram Protocol) port with sp_sendmsg or syb_sendmsg.
If more than one engine is configured, a port is used for each engine, numbered consecutively from the port number specified. If the port number is set to the default value, 0 Adaptive Server assigns port numbers.
 Sending messages to UDP ports is not supported on Windows
NT.
Sending messages to UDP ports is not supported on Windows
NT.
A System Security Officer must set the allow sendmsg configuration parameter to 1 to enable sending messages to UDP ports. To enable UDP messaging, a System Administrator must set allow sendmsg to 1. See “allow sendmsg”. For more information on UDP messaging, see sp_sendmsg in the Reference Manual.