HP DECnet SNA Gateway for Synchronous Transport, V1.4

HP DECnet SNA Gateway for SPD 25.C6.07
Synchronous Transport, Version 1.4
link control protocol (SDLC). The number of links sup-
ported depends on the hardware unit being used (DEC
MicroServer or DEC MicroServer-SP), line speeds re-
quired by the customer, and the electrical interface used.
Table 1 shows the configuration matrix for connecting to
the SNA network.
Table 1
Number of Synchronous Lines Supported
Maximum Line Speed (Kbps)
Electrical Interface 19.2 56/64 128 256
DEC MicroServer
RS232-D/V.24 4 – – –
V.35 44 21
DEC MicroServer-SP
RS232-D/V.24 1 – – –
Lines connected to the DEC MicroServer or DEC
MicroServer-SP should be configured according to
guidelines specified in the HP DECnet SNA Gateway-
ST user documentation.
Features
• NRZI support — Signaling mode for the line(s) from
the Gateway to the IBM system can be set to
NORMAL or NRZI (non-return-to-zero-inverted) so
that line characteristics match those set in the IBM
ACF/NCP LINE macro.
• Support for FULL duplex transmission — Circuits can
be set FULL duplex to allow data to be sent and
received simultaneously on full duplex lines. This
setting corresponds to DATMODE=FULL in the IBM
ACF/NCP PU macro.
• Support for RECFMS — The Gateway can send
Record Formatted Maintenance Statistics (RECFMS)
messages to the IBM system. These messages con-
tain counters requested by the IBM Network Prob-
lem Determination Application (NPDA) using Re-
quest Maintenance Statistics (REQMS) messages.
Not all RECFMS messages are supported by the
Gateway. Refer to the DECnet SNA Gateway-CT
and -ST Management user documentation for more
information.
• A simplified configuration procedure — After in-
stalling Gateway-ST gateway management software,
a single configuration procedure is run which cre-
ates command procedures that define items for the
DECnet database on the load host, and the SNA and
DECnet databases on the Gateway.
• Extended SDLC — Support for Extended Response
Mode SDLC (Modulo 128).
When Using DEC MicroServer Hardware
• Synchronous line support — HP DECnet SNA
Gateway-ST supports up to four SDLC connections
at speeds of 64 Kbs/circuit or less, two connections
at 128 Kbs/circuit, or a single connection at 256 Kbs.
• Session support — HP DECnet SNA Gateway-ST
supports up to 128 concurrent (Logical Unit) sessions
for selected access routines.
When Using DEC MicroServer-SP Hardware
• Synchronous line support — HP DECnet SNA
Gateway-ST supports one SDLC connection at up
to 19.2 Kbps.
• Session support — HP DECnet SNA Gateway-ST
supports up to 32 concurrent (Logical Unit) sessions
for selected access routines.
Loading HP DECnet SNA Gateway-ST Software
The DEC MicroServer requires software to be loaded
into memory before DECnet SNA Gateway operation.
HP DECnet SNA Gateway-ST software is downline
loaded into the hardware across the Ethernet LAN from
an OpenVMS I64, OpenVMS Alpha or OpenVMS VAX
system acting as a DECnet load host system.
Most Itanium, Alpha and VAX systems running Open-
VMS software are supported as Ethernet load hosts
for HP DECnet SNA Gateway-ST. Supported OpenVMS
configurations are described in the OpenVMS Operat-
ing System for I64, Alpha and VAX Software Product
Description (SPD 82.35.xx and 25.01.xx).
DECnet SNA Gateway Management Software
DECnet SNA gateway management software, which is
part of the DECnet SNA Gateway-ST, provides con-
figuration and management functions for use with HP
DECnet SNA Gateway for Synchronous Transport. This
management software allows the gateway administrator
to configure the software executing in the HP DECnet
SNA Gateway-ST system. The administrator can set up
parameters relating to lines, circuits, physical units, logi-
cal units, and other key variables necessary for network-
to-network communications between the DECnet and
SNA networks. In addition, the software allows the ad-
ministrator to manage and diagnose problems related to
the HP DECnet SNA Gateway-ST.
DECnet SNA gateway management software is required
on the HP load host node for HP DECnet SNA Gateway-
ST. It must also be present on any other OpenVMS
node where users want to manage HP DECnet SNA
Gateway-ST and the DEC MicroServer. It is strongly
recommended that the software also be installed on
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