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Systems Network Architecture
(SNA)
Onno W. Purbo
[email protected]
Outline
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Beberapa Definisi
Beberapa Konfigurasi Interkoneksi SNATCP/IP
Beberapa Contoh Barang
Beberapa Definisi
SNA Related Definition
System Network Architecture
(SNA)
APPC
Virtual Telecommunication
Access Method (VTAM)
Synchronous Data Link
Controller (SDLC)
TCP/IP Related Definition
TCP/IP
Transmission Control Protocol
(TCP)
InterNet Protocol (IP)
Interkoneksi SNA-TCP/IP
Why? (Dari BusTech)
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In today's corporate world, information, in
the form of data is located across the entire
enterprise, from desktop to mainframe. The
need to share this information in a distributed
heterogeneous environment is crucial to the
success of the mission critical-business
applications. In this environment, the rich
data content of the mainframe, which
commonly stores 70% of corporate America's
data, plays an ever-increasing roll. The
protocol of choice to achieve this
interoperability is TCP/IP.
Why? … continue ..
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Mainframe based TCP/IP protocol stacks have
become common place. Approximately 65%
of installed mainframes support TCP/IP, in
one form or another. Mainframe based TCP/IP
has two primary uses, access to legacy data
and file transfer.
In a typical implementation, access to legacy
data is accomplished via a telnet service
called TN3270E. In effect, TN3270E is a
standard 3270 screen protocol within the
headers and trailers that make up the telnet
packet.
Traditional SNA Network
Emulate Terminal & Hardware
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Emulation sessions replaced dedicated
terminal and printer hardware, but still
relied on an SNA LAN and WAN.
Remote offices were connected to the
mainframe via SDLC-attached remote
controllers.
Typical TCP/IP WAN
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Typically, an SNA WAN consists of
remote controllers connected over
source route bridges or SDLC leased
lines. The SNA WAN is generally not
integrated with the routed TCP/IP WAN.
TCP/IP WAN + SDLC LC
Use Mainframe TCP/IP Stack
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The mainframe TCP/IP stack allows for
the creation of a TCP/IP-only LAN and
WAN.
Cost Consideration
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the
the
the
the
cost
cost
cost
cost
of
of
of
of
the new gateways
re-engineering
upgrading
retraining
Channel Connected Solutions
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IBM Channel Connections
IBM Channel-Attached Control Units
SNA Gateway
The PCI Bus
Microsoft SNA Server
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Flexible Network Administration
Full SNA Application Support
SNA Server is a flexible LAN-to-SNA gateway
that provides SNA communications for LANbased services and multiple platform PC
workstations running a variety of network
protocols.
SNA Server employs a client/server
architecture that is tightly integrated with,
and leverages the strengths of, Windows NT
Server.
Microsoft SNA Server
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SNA Server can be configured as an IBM PU
2.0, PU 2.1, APPN® LEN node, and can
support multiple DSPU devices.
LU services provided are LU 0, 1, 2, 3, and LU
6.2. SNA API support is comprehensive,
including APPC, CPI-C, CSV, LUA/RUI,
LUA/SLI, and EHNAPPC.
SNA Server supports direct TN3270 access to
host applications through a Windows NT
Server-based TN3270 service.
Increased LAN Protocol Choice
SNA Server
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SNA Server offers flexibility and greater
choice.
Platform for Growth
Extra Layer of Security
Branch-Based Deployment
Model
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Remote SNA Servers connect to the
host via SDLC or LLC.
Centralized deployment model
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Channel-attached SNA Servers provide
support for TCP/IP clients.
Distributed deployment
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Remote SNA Servers connect via TCP/IP
to central site SNA Servers, sharing the
channel-attached host links.
Contoh Barang
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NetShuttle
Enterprise Express Adapter
NetShuttle
Enterprise Express Adapter