Siemens RUGGEDCOM ROX II User Manual page 378

Chapter 10
Serial Server
Each device supporting DNP must have a unique address within the collection of devices sending and receiving
DNP messages.
Address Learning for DNP
RUGGEDCOM ROX II implements both local and remote address learning for DNP. A local Device Address Table
is populated with DNP Addresses learned for local and remote DNP devices. Each DNP address is associated with
either a local serial port or a remote IP address.
When a message with an unknown DNP source address is received on a local serial port, the DNP source address
and serial port number are entered into the Device Address Table. When a message with an unknown DNP source
address is received from the IP network, on the IP interface that is configured as the DNP learning interface, the
DNP source address and the IP address of the sender are entered into the Device Address Table.
When a message with an unknown DNP destination address is received on a local serial port, the message is sent
in a UDP broadcast to the network interface configured as the DNP learning interface. When a message with an
unknown DNP destination address is received from the IP network, it is sent to all local serial ports configured as
DNP ports.
NOTE
Learned addresses are not recorded in the Device Address Table.
UDP transport is used during the DNP address learning phase.
An aging timer is maintained for each DNP address in the table, and is reset whenever a DNP message is sent to or
received for the specified address.
This learning facility makes it possible to configure the DNP3 protocol with a minimum number of parameters: a
TCP/UDP port number, a learning network interface and an aging timer.
DNP Broadcast Messages
DNP addresses 65521 through 65535 are reserved as DNP3 broadcast addresses. RUGGEDCOM ROX II supports
DNP3 broadcast messages. DNP broadcast messages received on local serial ports are transmitted to all IP
Addresses in the Device Address Table (whether learned or statically configured).
When a DNP broadcast message is received from the IP network, it is transmitted on all local serial ports
configured as DNP ports.
Section 10.2.1.4
Incoming/Outgoing Serial Connections
The RUGGEDCOM RX5000/MX5000/MX5000RE supports up to 32 TCP/UDP connections per serial port, up to a
total of 128 TCP/UDP connections to the serial server.
Section 10.2.2
Viewing a List of Serial Port Protocols
To view a list of serial port protocols configured on the device, type:
show interfaces serial port protocol
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RUGGEDCOM ROX II
CLI User Guide
Incoming/Outgoing Serial Connections