Bay Networks 3395A Manuale utente
*893-826-A*
January 1995
Bay Networks, Inc. Corporate Headquarters
4401 Great America Parkway
Santa Clara, CA 95054 8 Federal Street
Billerica, MA 01821
Configuring the
Model 3395A Access
Serving Features
ii 893-826-A
© 1994 by Bay Networks, Inc. All rights reserved.
Trademarks
SynOptics and SynOptics Communications are registered trademarks of Bay Networks, Inc. Bay
Networks, Bay Networks Press, and Lattis System 3000 are trademarks of Bay Networks, Inc.
Other brand and product names are registered trademarks or trademarks of their respective holders.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, Bay Networks,
Inc. reserves the right to make changes to the products described in this document without notice.
Bay Networks, Inc. does not assume any liability that may occur due to the use or application of the
product(s) or circuit layout(s) described herein.
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a ClassA digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy. If it is not
installed and used in accordance with the instruction manual, it may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference, in which case users will be required to take whatever measures may be necessary to
correct the interference at their own expense.
Electromagnetic Emissions
Meets requirements of:
FCC Part 15, SubpartsA and B, Class A
EN 55 022 (CISPR 22:1985), Class A
General License VDE 0871, Class B (AmtsblVfg No. 243/1991 and Vfg 46/1992)
VCCI Class 1 ITE
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Contents
Preface
Overview xi
Conventions xi
Ordering SynOptics Publications xii
Bay Networks-SynOptics Customer Support xii
InfoFACTS xiii
CompuServe xiii
PhonePlus xiii
Chapter 1 Introducing the Communication Server
What is a Communication Server? 1-1
Point-to-Point Protocol 1-3
IP/PPP (IPCP) Features 1-3
IPX/PPP (IPXCP) Features 1-6
Serial Line Internet Protocol (SLIP) 1-9
Xremote 1-11
ARAP Features 1-13
Automatic Protocol Detection 1-16
IP and IPX Routing 1-17
Dynamic Routing 1-17
Static Routing 1-18
IP and IPX Packet Filtering 1-18
Command Control Language (CCL) Scripts 1-19
Chapter 2 Basic Setup Activities for Access Serving
An Overview to Setting Up the Communication Server 2-1
Preliminary Tasks 2-1
Specific Activities for Configuring Access Serving Features 2-2
Information about Model 3395A Server Cabling Methods 2-3
Six-Wire Cabling 2-4
Eight-Wire Cabling 2-5
Selecting Protocols and Features 2-7
Configuring Ports to Detect Multiple Protocols (APD) 2-9
Chapter 3 Setting Up Basic Modem Applications
Basic Modem Port Setup 3-1
Modem Control Issues 3-1
Speed or Autobaud 3-2
Flow Control 3-3
Setting Up Dial-in Ports 3-4
Setting Up Dial-out Ports 3-5
Configuring a LAT Application Port at a VMS Host 3-6
Setting Up Dial-back Ports 3-7
Using Dial-back Scripts on the Communication Server 3-8
Configuring PORT Characteristics 3-8
Setting Up a Dial-back Script Server 3-9
Script File Structure and Guidelines 3-10
Directory Requirements 3-11
Script File Execution and Processing 3-12
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Chapter 4 Point-to-Point Protocol (PPP)
Enabling Protocols on the Server 4-1
Configuring a PPP Port for Modem Support 4-2
Configuring PPP 4-2
Enabling PPP at Specific Ports 4-2
Specifying Optional PPP Port Characteristics 4-3
Configuring IPCP Connections 4-4
Assigning Local and Remote IP Addresses to PPP Ports 4-5
Specifying Optional IPCP Port Characteristics 4-5
Specifying IP Static Routes 4-6
Examples of IPCP Single-Node Configuration 4-6
A PC with an Internet Address Within the LAN Subnet 4-7
A PC with an Internet Address Outside of the LAN Subnet 4-8
A PC with No Configured Internet Address 4-9
Example of an IPCP Network Configuration 4-10
Configuring IPXCP Connections 4-12
Specify IPXCP-Related SERVER characteristics 4-12
Defining IPX Protocol Packet Types 4-13
Defining IPX Network Numbers 4-13
SERVER IPX RIP Characteristics 4-14
SERVER IPX SAP Characteristics 4-15
Specify PORT Characteristics 4-15
Basic PORT IPX Characteristics 4-15
PORT IPX RIP Characteristics 4-16
PORT IPX SAP Characteristics 4-17
Specify Static Routes and Services 4-18
Chapter 5 Serial Line Internet Protocol (SLIP)
Configuring Ports to Use SLIP and CSLIP 5-1
Configuring Modem Support for SLIP Links 5-1
Enabling SLIP/CSLIP at Specific Ports 5-1
Assigning SLIP Addresses to Ports 5-3
SLIP Sessions 5-4
Example Configurations 5-4
Single-Node Applications 5-4
Direct Connection of a Host to a Serial Port 5-4
Dial-in SLIP Connection 5-5
Network Applications 5-6
Chapter 6 Setting Up ARAP
ARAP Setup 6-1
Enable the Server ARAP Protocol 6-1
Specify SERVER Characteristics 6-2
Specify PORT Characteristics 6-3
Configuring an ARAP Port for Modem Support 6-3
Enabling ARAP at Specific Ports 6-3
Specifying Optional ARAP Port Characteristics 6-4
Install CCL Scripts 6-4
Using ARAP with Authentication and Dial-back Features 6-5
Modifying Dial-back Scripts for ARAP Ports 6-11
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ARAP Planning Considerations 6-12
Example 6-13
Diagnostic Cabling 6-13
Chapter 7 Model 3395A Server Support for the Xremote Protocol
Starting Up the XDM Host 7-1
Configuring the Communication Server for Xremote Support 7-2
Enabling the Xremote Protocol on the Server 7-2
Defining Remote Font Servers 7-3
tftp Security on Font Servers 7-4
Defining Xremote Characteristics at Server Ports 7-5
Examples 7-5
Establishing an Xremote Session 7-6
Logging Out of the X Session 7-8
Using a Script to Configure the Server for Xremote Support 7-8
Enhancing Security for Xremote Users 7-10
The Communication Server Password 7-10
The SecurID Authentication System 7-10
The Kerberos Security System 7-10
Login Scripts and Dial-back Scripts 7-11
Notes on Memory Requirements for Xremote 7-11
How Xremote Can Affect Server Performance 7-11
Memory Requirements for Sessions and Windows 7-12
Notes and Restrictions 7-13
Chapter 8 Using CCL Scripts
Types of CCL Scripts Available 8-2
Communication Server Setup 8-3
Specify SERVER Characteristics 8-3
Specify PORT Characteristics 8-3
Script Server Setup 8-4
Directory Requirements 8-4
Installing CCL Scripts at Script Servers 8-5
Installing CCL Scripts at Macintosh Computers 8-6
Modifying CCL Scripts 8-7
Basic Format of a CCL Script 8-7
Modifying a CCL Script for Macintosh Computers 8-9
Modifying a CCL Script to Use Error Correction or Compression 8-11
Example Model 3395A Server CCL Extensions 8-12
Example of a Typical CCL Script 8-14
Appendix A Modem and Flow Control Operation
Modem Control Signal Interaction A-1
Dial-in Modems that Support RNG A-1
Dial-in Modems that Do Not Support RNG A-2
Dial-in to Remote Access Ports that Do Not Support RNG A-4
Dial-out Modems A-4
Dial-in/Dial-out Modems that Support RNG A-5
Dial-in/Dial-out Modems that Do Not Support RNG A-7
vi 893-826-A
Flow Control A-9
Software Flow Control A-9
Hardware Flow Control A-10
Setup A-10
Flow Control Operation A-11
Hardware Flow Control Operation Using the Modem Control Signal
Lines A-12
Index
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Figures
Figure 1-1. Network configuration with communication servers 1-2
Figure 1-2. IPCP single-node configuration 1-4
Figure 1-3. An IPCP network configuration 1-5
Figure 1-4. Basic IPXCP configuration using communication servers 1-6
Figure 1-5. IPXCP “LAN-to-LAN” configuration using communication
servers 1-7
Figure 1-6. SLIP connections to remote network, remote PC 1-10
Figure 1-7. Conventional Xremote implementation 1-12
Figure 1-8. An Xterminal connected to a Model 3395A server 1-13
Figure 1-9. Standard AppleTalk remote access configuration 1-14
Figure 1-10. AppleTalk remote access configuration using communication
servers 1-15
Figure 2-1. Modular cables for connecting a modem (6-wire port) 2-4
Figure 2-2. Modular cables for RTS/CTS flow control (6-wire port) 2-5
Figure 2-3. Modular cables for connecting a modem (8-wire port) 2-6
Figure 2-4. Modular cables for RTS/CTS flow control (8-wire port) 2-7
Figure 3-1. Example script server directory structure 3-10
Figure 4-1. A PC with an Internet address within the LAN subnet 4-7
Figure 4-2. A PC with an Internet address outside of the LAN subnet 4-8
Figure 4-3. A PC with no configured Internet address 4-10
Figure 4-4. Two communication servers in a back-to-back gateway 4-11
Figure 5-1. Direct SLIP connection 5-5
Figure 5-2. Dial-in SLIP connection 5-6
Figure 5-3. SLIP connections to remote network 5-7
Figure 6-1. Operation of authentication and security methods (part 1) 6-7
Figure 6-2. Operation of authentication and security methods (part 2) 6-8
Figure 6-3. Operation of authentication and security methods (part 3) 6-9
Figure 6-4. Operation of authentication and security methods (part 4) 6-10
Figure 6-5. Modular cables for connecting a Macintosh computer 6-13
Figure 7-1. Font servers 7-3
Figure A-1. State diagram for dial-in modems that support RNG A-2
Figure A-2. State diagram for dial-in modems that do not support RNG A-3
Figure A-3. State diagram for dial-out modems A-5
Figure A-4. State diagram for dial-in/dial-out modems that support
RNG A-7
Figure A-5. State diagram for dial-in/dial-out modems that do not support
RNG A-9
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Tables
Table 2-1. Cabling support for modem applications 2-3
Table 2-2. Modem control/flow control feature support 2-3
Table 2-3. Memory usage for features and protocols 2-8
Table 7-1. Default files 7-1
Table 7-2. Settings for port characteristics 7-7
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