HP DECnet-Plus for OpenVMS Alpha and OpenVMS I64, Version 8.3

HP DECnet-Plus for OpenVMS Alpha and OpenVMS I64, Version 8.3 SPD 50.45.19
• Simplified installation and configuration process.
• The Network Control Language (NCL). Network man-
agement is based on DNA CMIP, HP’s implementa-
tion of the OSI international standard Common Man-
agement Information Protocol.
• A graphical network management user interface,
net$mgmt, for improved network management, us-
ing NCL.
• An NCP (Network Control Program) emulator to facil-
itate installation of layered products written for DEC-
net Phase IV.
• Installation using the POLYCENTER Software Instal-
lation utility.
• Support for topologies using multicircuit and multi-
homed end nodes.
• Dynamic connections over X.25 networks.
HP DECnet-Plus for OpenVMS includes OSI implemen-
tation in accordance with current U.S. and U.K. GOSIP
requirements:
• Application, Presentation, and Session layers
— File Transfer, Access, and Management (FTAM)
application
— Virtual Terminal application
— Applicaton Service Elements (ASEs), including
ACSE (Association Control Service Element)
• Transport layer classes 0, 2, and 4
• Lower layers
— OSI addressing formats, supporting large network
topologies
— End system to intermediate system (ES-IS)
routing
— Connectionless Mode Network Service (CLNS)
over local area network (LAN) and wide area net-
work (WAN) , and X.25
— Logical Link Control type 2 (LLC2) for Connection–
Oriented Network Service (CONS) over LAN
— Data Link layer, supporting High-level Data Link
Control (HDLC) for wide area communications (Al-
pha only), ISO 8802-3 (Ethernet CSMA/CD) and
FDDI LANs. HDLC support includes the LAPB
(Link Access Protocol Balanced) protocol for X.25
communications. For Version 8.2, HDLC is sup-
ported only on OpenVMS Alpha systems.
— Physical layer, with CSMA/CD, HDLC (Alpha
only), and FDDI devices supported.
HP DECnet-Plus for OpenVMS offers task-to-task com-
munications, file management, downline system and
task loading, network command terminals, and net-
work resource sharing capabilities using DNA, OSI, and
TCP/IP protocols. DECnet-Plus for OpenVMS commu-
nicates with adjacent and non-adjacent DECnet Phase
IV, Advanced Server/PATHWORKS, DECnet-Plus im-
plementations on other OpenVMS systems and Tru64
UNIX systems, as well as systems running TCP/IP
transports and on OSI-compliant systems from other
vendors.
OpenVMS programs written in native-mode program-
ming languages can use DECnet-Plus for OpenVMS
capabilities.
Depending on the system configuration, networks com-
bining HP DECnet-Plus for OpenVMS systems with
other DECnet, OSI, and TCP/IP products may limit the
functions available if all products do not support equal
features.
Data Link Layer
HP DECnet-Plus for OpenVMS uses Ethernet and FDDI
communications controllers to interface with other net-
work nodes.
LAN connectivity is provided by the CSMA/CD and FDDI
controllers and drivers supporting ISO 8802-2 Logical
Link Control (LLC) Type 1 connectionless service. HP
DECnet-Plus also supports Ethernet Version 2 packet
formats on CSMA/CD devices.
Use of FDDI packets larger than 1500 bytes requires a
Phase V router on the FDDI LAN. The maximum Phase
V FDDI packet size is 4352 bytes for use with other
Phase V network nodes. As with cluster alias support,
you can configure the Phase V router to run the Phase
IV distance vector routing protocol or the Phase V link
state routing protocol.
WAN connectivity is provided by optional X.25 software
supporting host-based synchronous communications in-
terfaces (Alpha-only).
All the synchronous devices support DIGITAL-HDLC
(Alpha-only) and LAPB/E (Alpha-only) and data link pro-
tocols. X.25 for OpenVMS Alpha is required to establish
host-based wide area connections.
HP DECnet-Plus for OpenVMS allows a maximum of
32 circuits on a full routing node and up to four circuits
defined and operational on an end system. This capa-
bility allows a single end system to be connected to up
to four separate LANs or WANs. HP recommends that
the circuits be equal in capacity and connectivity.
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