Transcript Document

Migrating Printing
from SNA to TCP/IP
The LRS Philosophy
1
Reasons for Migrating
• IP offers obvious advantages
over SNA
–
–
–
–
Lower costs
Single network protocol for all printing
Easier steps to adding printers
Open TCP/IP protocol supported by numerous
output devices
– Higher performance and dependability
2
IP Printing Options
from MVS
• Various points for SNA to IP ‘bridge’
• Many ways to ‘bridge’ gap between SNA and IP
– SNA Emulation/Gateway
• Server level
• Desktop SNA emulations
3
LRS IP Philosophy
• LRS philosophy of IP printing: Begin at the
source
• Send SYSOUT data directly from MVS across
TCP/IP to printer
• No intermediate emulation
• Data never touches ‘SNA world’
4
LRS IP Printing Options
• LRS offers various options for
printing host output via TCP/IP
– VPS/TCPIP
• LPR/LPD
• Sockets
• BIP™ Support
– VPS/AnyQueue™
– VPS/Email
5
LPR/LPD Printing
• Advantages
– Ubiquitous
• Almost every TCP/IP host supports LPD
• Disadvantages
– Inefficient
• Overhead associated with LPR/LPD
– Separators and checkpointing do not work as
well as with SNA
6
Sockets Printing
• Advantages
– Efficient
• No need to ‘stage’ data before processing
• LPR/LPD ‘control file’ and associated processing not needed
– Separators work as they do in SNA
– Commands and checkpointing also work as expected
• Disadvantages
– Servers generally do not support Direct Sockets
connection
• Direct sockets connection cannot be made to UNIX or NT
servers
7
BIP
• BIP (Bi-directional Internet Printing) enhances
VPS/TCPIP Direct Sockets support
• Advantages
– Greater control
•
•
•
•
Two-way communication with printer
Recoverability
Status messages
Cancel key
• Disadvantages
– Same as ‘sockets printer’
• Does not work through servers
• Some printers do not support BIP; most do
8
BIP Features
• Recoverability
– ‘Remembers’ last page printed
– Restarts at proper page after error or interrupt
• Status Messages
– Error Status codes displayed by VPS
– VPS continues printing when condition cleared
• End user can cancel print using printer’s
cancel key
9
VPS/AnyQueue Printing
• VPS ‘downloads’ output
to VPS/AnyQueue
• VPS/AnyQueue ‘forwards’ output to printers
– IP
– LAN Protocols
• Advantage
– LAN level control
• Disadvantage
– LAN level control
10
VPS/Email Printing
• VPS/Email delivers SYSOUT to email
address instead of printer
• Advantages
– Email recipient controls
printing using local printer
drivers
– PDF, HTML, RTF (word
processing), txt formats all
supported
– User may view document and
print only selected portions
11
Formatting Email Output
• VPS/Email has various formatting options
for attachments
– PDF
• Ubiquitous – most users familiar with Adobe
Acrobat Reader
• Attractive output
– Font can be selected
– Font size can be selected
– Page size can be selected
– RTF
• User created RTF files can be used
• Opened by default word processor
12
Formatting IP Print Output
• Standard VPS functions allow user
control of output formatting
–
–
–
–
Landscape/Portrait
Multiple up (PostScript)
Duplex
Input tray selection
13
Summary
• LRS IP printing is 100% IP
– No need to bridge ‘gap’ between SNA and IP
• Multiple IP printing methods
– VPS/TCPIP
– VPS/AnyQueue
– VPS/Email
• Flexible formatting
14
Migrating Printing from
SNA to TCP/IP
Questions?
15