Download Siemens RUGGEDCOM RSG2200 User guide

RUGGEDCOM ROS
User Guide
Chapter 5
Setup and Configuration
Address Learning for TIN Mode 1
When a message with an unknown source address is received from the IP network, it is learned on the IP
address and IP port. If a message with the same source address is received from another IP address and/or IP
port, the address will be relearned.
The aging time will be reset whenever a unicast TIN message is received from a particular source address.
The address will be removed from the table when the aging time expires.
Address Learning for TIN Mode 2
When a message with an unknown source address is received from the IP network, it is learned on the IP
address. If a message with the same source address is received from another IP address and/or IP port, it will
be learned again, and another entry will be created in the Dynamic Device Address Table (TIN addresses will be
duplicated).
Aging time will be reset whenever a unicast TIN message is received from a particular source address.
The address will be removed from the table when the aging time expires.
Section 5.4.3.4
Address Learning for DNP
For the DNP protocol, both the local and remote concepts of address learning are implemented. Source
addresses are learned from messages received from the network for specific IP Addresses. Source addresses
from messages received from the serial ports are learned for specific local serial ports.
Although the DNP protocol can be configured for TCP or UDP transport, UDP transport is used during the
address learning phase as it supports all types of IP addresses: unicast, multicast and broadcast.
When a message with an unknown source address is received from the local serial port, the address is learned
on that port and the local IP address.
When a message with an unknown source address is received from the IP network, on IP interface that is
configured as learning interface, it is learned on the IP address of the sender and serial port is unknown.
When a message with an unknown destination address is received from a serial port, a UDP broadcast datagram
is transmitted on the UDP port configured for the DNP protocol. The IP interface that transmits this broadcast is
the one configured as the learning interface.
When a message with an unknown destination address is received from the IP network, it is sent to all DNP serial
ports.
All learned addresses will be kept in the Device Address Table until they are active. They will also be saved in
non-volatile memory and recovered if the device reboots, so the learning process does not have to be repeated
because of, for example, an accidental power interruption.
The aging timer is reset whenever a message is received or sent to the specified address.
This concept makes the DNP protocol configurable with the minimum number of parameters: an IP port, a
learning IP interface and an aging timer.
Address Learning for DNP
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