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7.6 Ethernet Interface
The rack mount SSPA Ethernet Port (J9) supports several IP network protocols to
provide a full featured remote M&C interface over an Ethernet LAN.
•
IPNet protocol – redirection of standard Paradise Datacom LLC serial proto-
col over UDP transport layer protocol. This protocol is fully supported in
Paradise Datacom LLC’s Universal M&C software.
•
SNMPv1 protocol - protocol intended for integration into large corporate
NMS architectures.
In order to utilize either of the protocols listed above, the relevant interface option has
to be turned on. Refer to
Section 7.6.1.2
(Setting IPNet interface) and
Section 7.6.2.4
(Configuring RM SSPA unit to work with SNMP protocol) for details.
Of course, standard IP level functions such as ICMP Ping and ARP are supported as
well. There is currently no support for dynamic IP settings, all IP parameters.
7.6.1 IPNet Interface
7.6.1.1 General Concept
Satcom system integrators are recognizing the benefits of an Ethernet IP interface.
These benefits include:
•
Unsurpassed system integration capabilities;
•
Widely available and inexpensive set of support equipment (network cable;
network hubs);
•
Ability to control equipment over Internet;
•
Ease of use
Implementation of the raw Ethernet interface is not practical due to the limitations it
places on M&C capabilities by the range of a particular LAN. It is more practical to use
an Ethernet interface in conjunction with the standard OSI (Open System Interconnect)
model to carry a stack of other protocols. In an OSI layered stack, an Ethernet
interface can be represented as a Data Link layer. All upper layers are resolved
through a set of IP protocols. In order to keep data bandwidth as low as possible
(which is important when M&C functions are provided through a low-bandwidth service
channel) the IP/UDP protocol set is used as the Network/Transport layer protocol on
Teledyne Paradise Datacom SSPAs.
UDP (User Datagram Protocol) was chosen over TCP (Transmission Control Protocol)
because it is connectionless; that is, no end-to-end connection is made between the
SSPA unit and controlling workstation when datagrams (packets) are exchanged.
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