Sybase ETL Server is a scalable and distributed grid engine that connects to data sources, and extracts and loads data to data targets using transformation flows designed using Sybase ETL Development. Sybase ETL Server uses User Datagram Protocol (UDP) broadcasts to inform other servers about urgent events, such as starting and stopping, as well as system failure or crash.
The default port for communication which you can change in the INI file, or by using the command line, is 5124.
All communication between servers is done over TCP/IP on the same port.
Verify there are no firewalls blocking this port and the port is not in use. You can also change the port on all server installations to a different number, if necessary.