Transcript SNA Switching Services (SNASw) Overview

SNA Switching
Services (SNASw)
Overview
Leveraging Investments,
Empowering the Enterprise
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Agenda
• Emerging Network Trends
• Status of APPN Networks Today
• Cisco SNASw
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Moving to a
New World Network
Old World Network
New World Network
• SNA-based applications
on enterprise servers
• IP-based applications on
multiple server platforms
• 10- and 16-Mbps shared
campus network
• Media-independent,
high-speed campus
switching
• PBX for separate
voice network
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• Consolidated data, voice,
and video
• Low-speed WAN
connectivity
• High-speed
WAN connectivity
• “Fat” clients
• “Thin” clients
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Leveraging Investments,
Empowering the Enterprise
e-nable the WAN
A consolidated IP intranet that
supports SNA, TCP/IP, voice, and video
e-nable the Data Center
A data center that provides access to
business data and applications
e-nable the Application
Web-enabled access to all applications
e-nable the Campus
A media-independent, high-speed,
switched infrastructure
Cisco Has All of These
Solutions Available Today!
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Today’s Consolidated
Data Network
SNA and TCP/IP Applications
SNASw
TN3270
Server
TCP/IP
Applications
High-Speed Campus
Backbone
DLSw+
DLSw+
DLSw+
TCP/IP
Corporate
Intranet
Web
Server
Internet
TN3270 Client
A Robust IP Infrastructure Can Support
SNA and IP Clients and Applications
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Web Browsers
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e-nable the Data Center
SNA and TCP/IP Applications
SNASw
TN3270
Server
Corporate
Intranet
Web
Server
Internet
e-nable the Data Center
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Leveraging Investments
Roadmap
e-nable
the WAN
e-nable
the Data Center
SNASw, CIP Performance
Enhancements
e-nable
the Application
Cisco WebClient Enhancements,
Cisco Transaction Connection,
TN3270 Enhancements
e-nable
the Campus
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DLSw+ Availability, Scalability,
Performance Enhancements,
CiscoWorks Blue Enhancements
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Gigabit Token Ring
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Empowering the
Enterprise Roadmap
e-nable
the WAN
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Enterprise VPN and
Multiservice Solutions
e-nable
the Data Center
Enhanced TCP/IP
Network Services
e-nable
the Application
End-to-End Network Services
e-nable
the Campus
Gigabit and ATM-Consolidated
Ethernet and Token Ring
Solutions
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Why Enterprises
Choose APPN
• Native SNA routing (95%)
• Reduced FEP dependency (90%)
• Support for Sysplex environment (80%)
• Peer-to-peer communications (20%)
• Native SNA network (10%)
Source: Cisco customers
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What Do Cisco APPN Networks
Look Like Today?
Channel
APPN
DLSw+
Channel
Si
APPN
DLSw+
Channel
APPN
IP
DLSw+
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APPN
APPN
APPN
• 90%—DLSw+ on backbone,
APPN in data center
Channel
APPN
• 10%—Native APPN
across the backbone
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Cisco APPN Goals
• Integrate APPN into the IP infrastructure
• Provide efficient APPN routing
functionality
• Improve APPN scalability
• Reduce APPN complexity
Simplify network design
Reduce configuration requirements
• Improve manageability of APPN
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Introducing:
SNA Switching Services
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What Are
SNA Switching Services?
• New release of APPN
• Branch Extender (BX)
support to improve
scalability
• Enterprise Extender (EX)
support to integrate
APPN into the IP network
• Full HPR support with
updated ARB flow control
• Usability and management
enhancements
• Reduced configuration
requirements
Data Center
Channel
Routers
WAN IP
Routers
SNASw
IP
DLSw+
Access
IP Routers
SNA Clients
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APPN NN versus SNASw BX
Cisco APPN NN
SNASw BX
Full Routing Services
Works with VTAM To
Provide Routing Services
HPR Network Support
over IP: DLSw+
HPR Network Support
over IP: DLSw+, EX
More than 100 Configuration
Commands and Operands
Approximately 30
Commands and Operands
Broadcast Traffic Grows as
Number of Routers Increases
Broadcast Traffic
Eliminated from Network
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What Is Branch Extender?
NN
Channel
Attached
Router
Channel
Attached
Router
• BX looks like an EN
to upstream nodes
Emulated EN
BX
• BX looks like a NN to
downstream nodes
PU2
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Emulated NN
EN
PU2
EN
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Branch Extender
Network Design
• Single (plus backup) VTAM
NN with DLUS
Network
Node
End
Node
Channel
Routers
• Application hosts ENs
• SNASw with BX in the
data center
• Channel-attached routers
bridge to VTAM
No APPN
Broadcast Traffic!
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Data Center
Data Center
Network
SNASw
BX
IP Infrastructure
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What Is Enterprise Extender?
• SNA messages exit
enterprise server using
IP—HPR/IP
• IP routing through the
network using RIP or OSPF
Application
Host
VTAM
NN
Channel
Attached
Router
Channel
Attached
Router
• Flow control, error control,
segmenting end-to-end
using HPR
EX
• Parallel sysplex capable
PU2
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EN
PU2
EN
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Enterprise Extender Network
Design—Two Options
NN/EX
EN/EX
NN/EX
EN/EX
Channel
Routers
IP Data
Center Network
IP Data
Center Network
SNASw/EX
DLSw+
IP Network
Routers
DLSw+
Routers
Option 1: DLSw+ to the Branch
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IP Routers
IP
Infrastructure
IP
Infrastructure
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Channel
Routers
SNASw/EX
Option 2: EX to the Branch
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Remote DLSw+ and
EX Comparison
DLSw+
EX
Message
Sets IP Precedence Sets IP
Priority
Bits
Precedence Bits
Availability
DLSw+ Router
VTAM Recovery
Limitations
Point of Failure
for RTP
Connections
Risks
Mature
New, Untested
(500,000+ Routers)
Remote Routers Minimal Memory,
More Memory,
Minimal Processing More Processing
Overhead
Overhead
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Managing APPN Resources
with Maps and SNAView
• From a Web
browser, access:
SNA resources
(PU and LU sessions)
Topology and
directory information
Path information
Hot links to
other tools
V. 2.1 shipping 9/99
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The Result:
An IP Infrastructure
• Internet-ready,
multiservice-ready
Web
Server
• SNA or IP clients
Parallel
Sysplex
• SNA or IP
applications
TN3270
Server
TCP/IP
SNASw
WebClient
TN3270
Client
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SNA
Client
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Summary
The SNASw solution from Cisco
• Integrates SNA into the IP infrastructure
• Reduces complexity in APPN networks
• Provides a scalable solution
• Interfaces with all architecturally compliant
APPN nodes
• Provides enhanced usability and
management functionality
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