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Introductionto

Terminal Emulation

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ngAgenda

• TNVT100/220

• TN3270 & TN5250

• SNA SDLC 3270 & 5250

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ngAll TN Host Connections

• TNVT100/220, TN3270, TN5250• TN = Telnet

• Protocol = TCP/IP• Transmission Control Protocol / Internet

Protocol

• Network Architecture = Ethernet• IEEE 802.3 Standards

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• Unix Hosts• IBM: RS6000• HP: HP9000• DEC: VAX• PC: SCO• PC: Linux

• Windows NT– Requires Telnet

Demon• Georgia Soft• Ataman

DEC LAT: NOT SUPPORTED!LAT not compatible with TCP/IP on same Ethernet

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• HHP solutions supported– TN Client (direct connect)– Universal Gateway (controller)

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• Typical wired environment

Ethernet

UNIX HostNT Server

PC PCPC

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• RF TN Client (direct connect solution)

UNIX HostNT Server

Ethernet

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• RF Universal Gateway solution

UNIX HostNT Server

Ethernet

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• Segmented RF SystemSegmented could be through a

router within a building or campus environment, or over a WAN

Ethernet

UNIX Host NT Server

Ethernet

Router

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ngTN3270 & TN5250

• IBM 3270 Hosts– ES9000– S370– S390– AS/400

• IBM 5250 Host– AS/400

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ngTN3270 & TN5250

• Solutions supported– TN Client (direct connect)– Universal Gateway (controller)

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ngTN3270 & TN5250

• Typical wired connection

Ethernet

PC PCPC

MainframeIBM AS/400

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ngTN3270 & TN5250

• RF TN Client (direct connect solution)

Ethernet

MainframeIBM AS/400

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ngTN3270 & TN5250

• RF Universal Gateway solution

Ethernet

MainframeIBM AS/400

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ngTN3270 & TN5250

• Segmented RF solution

Ethernet Ethernet

Mainframe

Router

IBM AS/400

Segmented could be through arouter within a building or campus

environment, or over a WAN

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ngRequired TN Config. Information

• Host IP address/addresses• Subnet mask• Terminal IP addresses• Universal Gateway IP address/addresses

– If used

• Router (gateway) IP address– If used

• Access Point IP addresses– If using IP on Access Points

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ngTN Client or Universal Gateway?

• TN Client– 15 terminals or less– Lower hardware cost– Less hardware to fail– Less network traffic– Load configuration to

each terminal– Debug logs stored in

terminal

• Universal Gateway– Large or complex

systems– Holds all terminal

configurations– Dial in support

• trouble shooting• access to logs

– IBM SNA SDLC• Host not Ethernet

connected

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ngIBM SNA SDLC 3270 / 5250

• IBM 3270 Hosts– ES9000– S370– S390– AS/400

• IBM 5250 Host– AS/400

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ngIBM SNA SDLC 3270 & 5250

• Host Protocol = SNA• SNA: Synchronous Network Architecture

– *** Synchronous *** (requires external clocking)

• Host Network Architecture = SDLC• SDLC: Synchronous Data Link Control

– V.24 connection, RS232 38400 BPS– V.35 connection, 57600 BPS

• Star topology from controller to terminals

• Token Ring

• Not currently supported!

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ngIBM SNA SDLA 3270 & 5250

• Controller based solution

3270 Controller•3274-51C cluster controller•16 terminals per controller•Multiple controllers definable

5250 Controller•5294-1 cluster controller•8 terminals per controller•Multiple controllers definable

3270 Terminal•3278 Model 2 emulation

5250 Terminal•5251 Model 11 emulation

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ngIBM SNA SDLC 3270 & 5250

• If no TCP/IP addresses, how do they communicate?

IBM AS/400IBM 5294 controller

Modem Eliminator

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

Host: 3CPU: FF

LUs: 0 - 7(3270: 2 - 17)

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ngIBM SNA SDLC 3270 & 5250

• Typical wired connection (single controller)

IBM AS/400IBM 5294 controller

Modem Eliminator

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

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ngIBM SNA SDLC 3270 & 5250

• Typical wired connection (multi controller)

IBM AS/400IBM 5294 controller

Modem Eliminator

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

IBM 5294 controller

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ngIBM SNA SDLC 3270 & 5250

• Typical wired connection (remote controller)

IBM AS/400

IBM 5294 controller

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

5251 Terminal

Modem

Modem

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ngIBM SNA SDLC 3270 & 5250

• RF solution

IBM AS/400

Modem Eliminator

Ethernet

Universal Gateway(IBM Controller)

Dolphin 7200(IBM Terminal)

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ngIBM SNA SDLC 3270 & 5250

• Segmented RF Solution

Ethernet

IBM AS/400

Modem Eliminator

Ethernet

Router

Segmented could be through arouter within a building or campus

environment, or over a WAN

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ngIBM SNA SDLC 3270 & 5250

• Remote RF Solution

IBM AS/400

Modem

Modem

Ethernet

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ng • Required Configuration Information

IBM SNA SDLC 3270 & 5250

IBM AS/400IBM 5294 controller

Modem Eliminator5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

5291 Terminal

Host Address in HEXPU Address in HEXLU #s enabledLine SpeedMax Data SizeNRZ or NRZIFull or Half Duplex

Host: 3CPU: FF

38400

521NRZFull

LUs: 0 - 7(3270: 2 - 17)

Universal Gateway

RF Terminals

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Questions?