Configuring BSC
Transport Services
Router Software Version 11.01
Site Manager Software Version 5.01
Part No. 114077 Rev. B
January 1997
4401 Great America Parkway 8 Federal Street
Santa Clara, CA 95054 Billerica, MA 01821
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114077 Rev. B
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114077 Rev. B
iii
Bay Networks Software License
9. Licensee shall not reverse assemble, reverse compile, or in any way reverse engineer the Software. [Note: For
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(continued)
iv
114077 Rev. B
Contents
About This Guide
Audience ..........................................................................................................................xiii
Before You Begin .............................................................................................................xiii
Conventions .....................................................................................................................xiv
Acronyms ......................................................................................................................... xv
Ordering Bay Networks Publications ............................................................................... xv
Technical Support and Online Services
Bay Networks Customer Service ...................................................................................xviii
Bay Networks Information Services .................................................................................xix
World Wide Web ........................................................................................................xix
Customer Service FTP ..............................................................................................xix
Support Source CD ................................................................................................... xx
CompuServe .............................................................................................................xx
InfoFACTS .................................................................................................................xxi
How to Get Help ..............................................................................................................xxi
Chapter 1
Starting BSC Transport Services
Preparing a Configuration File ........................................................................................1-1
Starting BTS ...................................................................................................................1-2
Deleting BTS from the Platform ......................................................................................1-2
Chapter 2
BSC Transport Services Overview
BSC Protocol ..................................................................................................................2-1
Hosts and Control Units ..................................................................................................2-2
Transmitting BSC Frames over TCP ...............................................................................2-2
Point-to-Point and Multipoint Configurations ...................................................................2-4
Point-to-Point Configuration .....................................................................................2-4
114077 Rev. B
v
Multipoint Configuration ...........................................................................................2-4
Virtual Multipoint Configuration ................................................................................2-5
Chapter 3
Implementation Notes
BTS Interfaces ................................................................................................................3-1
Peer Routers ...................................................................................................................3-1
Connections to Control Units ..........................................................................................3-2
Line Details .....................................................................................................................3-2
Chapter 4
Configuring BTS
Using the MIB Object ID .................................................................................................4-1
Accessing BTS Parameters ............................................................................................4-2
Globally Enabling and Disabling BTS .............................................................................4-2
Customizing BTS Interfaces ...........................................................................................4-3
Enabling and Disabling BTS Interfaces ....................................................................4-3
Creating Primary and Secondary Connections ........................................................4-4
Selecting an Interface Type ......................................................................................4-4
Setting the TCP Keepalive Parameters ....................................................................4-4
Deleting a BTS Interface ..........................................................................................4-5
Assigning Peer Routers ..................................................................................................4-6
Specifying the Peer IP Address ...............................................................................4-6
Selecting the Connection Originator ........................................................................4-6
Setting the TCP Listen Ports ....................................................................................4-7
Enabling and Disabling BTS Peer Connections .......................................................4-8
Creating Connections to Control Units ...........................................................................4-8
Entering the Control Unit Address ...........................................................................4-9
Enabling and Disabling a Connection to a Control Unit ...........................................4-9
Editing Line Parameters .................................................................................................4-9
Enabling the Line ...................................................................................................4-10
Setting the Transmission Frame Size .....................................................................4-10
Adjusting the Bisynchronous Timing Signals .........................................................4-10
Adjusting the Transmission Queues .......................................................................4-11
Setting the Control Character Mode .......................................................................4-12
Enabling and Disabling RTS and CTS Signal Detection ........................................4-12
vi
114077 Rev. B
Appendix A
Control Unit Addresses
Appendix B
BTS Parameters
BTS Global Parameters ................................................................................................. B-1
BTS Interface Parameters ............................................................................................. B-1
BTS Peer Table Parameters .......................................................................................... B-4
BOT CU Table Parameters ............................................................................................ B-6
Line Parameters ............................................................................................................ B-7
Appendix C
Default Values for BTS Parameters
Index
114077 Rev. B
vii
Figures
Figure 2-1. Tunneling of BSC Frames ........................................................................2-3
Figure 2-2. BTS Point-to-Point Configuration .............................................................2-4
Figure 2-3. BTS Multipoint Configuration ...................................................................2-5
Figure 2-4. BTS Virtual Multipoint Configuration ........................................................2-6
114077 Rev. B
ix
Tables
Table A-1. Device Address Table for BSC3 .............................................................. A-1
Table C-1. Interface Parameters ...............................................................................C-1
Table C-2. Peer Entry Parameters ............................................................................C-1
Table C-3. Control Unit Parameters .........................................................................C-2
Table C-4. Line Parameters ......................................................................................C-2
114077 Rev. B
xi
About This Guide
This guide describes how to configure router software to transport binary
synchronous communication (BSC) data over a multiprotocol backbone network.
If you configure and manage BSC Transport Services (BTS) for Bay Networks®
routers, you need to read about
• Starting BTS (Chapter 1)
• Using BTS in different network configurations (Chapter 2)
• Implementing BTS on your network (Chapter 3)
• Configuring BTS (Chapter 4)
• Selecting control unit addresses (Appendix A)
• Using the BTS parameter descriptions (Appendix B)
• Default settings (Appendix C)
Audience
This guide addresses system and network managers who have used Site Manager
software to configure Bay Networks routers. If you have not used Site Manager
software to configure Bay Networks routers, read
and
Configuring Routers
Before You Begin
Before using this guide, you must complete the following procedures. For a new
router:
• Install the router (refer to the installation manual that came with your router).
114077 Rev. B
Using Site Manager Software
before you use this guide.
xiii
Configuring BSC Transport Services
• Connect the router to the network and create a pilot configuration file (refer to
Quick-Starting Routers and BNX Platforms; Connecting BayStack AN and
ANH Systems to a Network
to a Network)
.
Make sure you are running the latest version of Bay Networks Site Manager and
router software. For instructions, refer to
7–10.xx to Version 11.0
Conventions
This section describes the conventions used in this guide.
angle brackets (< >) Indicate that you choose the text to enter based on the
; or
Connecting ASN Routers and BNX Platforms
Upgrading Routers from Version
.
description inside the brackets. Do not type the
brackets when entering the command. Example: if
command syntax is
192.32.10.12
ping
<ip_address>
, you enter
ping
bold text
Indicates text that you need to enter, command names,
and buttons in menu paths.
Example: Enter
Example: Use the
Example: ATM DXI > Interfaces >
wfsm &
dinfo
command.
PVCs
identifies the
PVCs button in the window that appears when you
select the Interfaces option from the ATM DXI menu.
italic text
Indicates variable values in command syntax
descriptions, new terms, file and directory names, and
book titles.
quotation marks (“ ”) Indicate the title of a chapter or section within a book.
separator ( > ) Separates menu and option names in instructions and
internal pin-to-pin wire connections.
Example: Protocols > SDLC identifies the SDLC
option in the Protocols menu.
Example: Pin 7 > 19 > 20
screen text
Indicates data that appears on the screen. Example:
Bay Networks Trap Monitor Filters
Set
xiv
114077 Rev. B
Acronyms
About This Guide
vertical line (|) Indicates that you enter only one of the parts of the
command. The vertical line separates choices. Do not
type the vertical line when entering the command.
Example: If the command syntax is
|
show at routes
show at routes
ASCII American Standard Code for Information Interchange
Bisync binary synchronous communication
BOT binary synchronous communication (BSC) over TCP/IP
BSC binary synchronous communication
BTS BSC Transport Services
CTS clear to send
CU control unit
EBCDIC Extended Binary Coded Decimal Interchange Code
FEP front-end processor
FTP File Transfer Protocol
ISDN BRI Integrated Services Digital Network basic rate interface
MTU maximum transmission unti
RTS request to send
TCP Transmission Control Protocol
, you enter either
nets
or
show at nets
, but not both.
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You can also use these numbers to request a free catalog of Bay Networks Press
product publications.
114077 Rev. B
xv
Technical Support and Online Services
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worldwide, Bay Networks Customer Service has Technical Response Centers
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• Santa Clara, California
• Sydney, Australia
• Tokyo, Japan
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114077 Rev. B
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Service FTP, and InfoFACTS document fax service.
xvii
Configuring BSC Transport Services
Bay Networks Customer Service
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xviii
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114077 Rev. B
Bay Networks Information Services
Bay Networks Information Services provide up-to-date support information as a
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Technical Support and Online Services
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Accessible via URL
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114077 Rev. B
http://www.baynetworks.com
ftp://support.baynetworks.com
. Customer Service is a
(134.177.3.26), this site
xix
Configuring BSC Transport Services
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xx
The message section is monitored by Bay Networks engineers, who provide
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114077 Rev. B
.
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How to Get Help
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Technical Response Center Telephone Number Fax Number
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Santa Clara, CA 1-800-2LANWAN (408) 764-1188
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Sydney, Australia (612) 9927-8800 (612) 9927-8811
Tokyo, Japan (81) 3-5402-0180 (81) 3-5402-0173
Technical Support and Online Services
114077 Rev. B
xxi
Starting BSC Transport Services
The quickest way to begin using BTS is to enable it with default values for all
Bisync over TCP (BOT) interfaces and peers. The sections that follow describe
this procedure.
If you want to modify BOT parameters, refer to Chapter 4. See Appendix B for
complete descriptions of the BOT parameters as they appear in Site Manager.
Preparing a Configuration File
Chapter 1
114077 Rev. B
To enable BTS, read
1.
Open a configuration file.
2.
Specify router hardware if this is a local-mode configuration file. Bay
Networks supports BTS on AN, ASN, ARN, and BN platforms.
3.
Choose a link module. For ASN routers, select the Dual Sync or the Dual
Sync/ISDN BRI network module. For ARN routers, select the Serial adaptor
module. For BN routers, select the Octal Sync module. (Other synchronous
link modules are not supported.)
Selected the module connector on which you want to use BTS. Y ou can enable
4.
BTS only on connectors labeled COM1 and COM2. On the Octal Sync
module, select any COM connector.
Refer to
Configuring Routers
Configuring Routers
for instructions on these procedures.
and
1-1
Configuring BSC Transport Services
Starting BTS
To start BTS on an interface, select the synchronous connector on which you are
enabling BTS, and then follow the path described in this box:
Site Manager Path:
you select the connector,
window appears. Click on OK to accept the default values, or edit the
parameters to customize the configuration, and then click on OK.
Enable: page B-1
Interface Attached To: page B-2
Interface Type: page B-2
TCP Keepalive Int: page B-3
TCP Keepalive Retry Timeout: page B-3
TCP Keepalive Retry Count: page B-4
From the WAN Protocols window that appears after
select BOT
Deleting BTS from the Platform
To delete BTS from
path:
Site Manager Path:
prompts:
to the Configuration Manager window. BTS interfaces are no longer operating on the
platform.
Do you REALLY want to delete BOT?
all
circuits on which it is currently configured, follow this
Configuration Manager > Protocols > BOT > Delete BOT. A window
. Click on OK. The BOT Interfaces
Click on OK. Site Manager returns you
1-2
114077 Rev. B
Chapter 2
BSC Transport Services Overview
BTS transmits binary synchronous communication (BSC) data over a
multiprotocol backbone network. A BTS configuration on the router executes the
protocol application Bisync Over TCP (BO T). BTS operates on the Bay Netw orks
AN, ARN, ASN, and BN routers running Software Version 11.01 or later.
In the 1960s, IBM introduced the BSC protocol to transmit data between
mainframes and remote devices. Since then, IBM and many other vendors have
been using the BSC protocol with many types of computers and devices. BTS
users of BSC equipment can improve their networks by
• Integrating BSC devices into an existing network of newer client/server
• Eliminating direct BSC lines, which are expensive and often underused
• Ensuring an extremely reliable and resilient method of data transmission via
BSC Protocol
BSC typically operates over low-speed lines up to 19.2 Kb/s. The BSC protocol is
character-oriented and assumes 8-bit characters. It uses EBCDIC or, less
commonly, ASCII and other code sets for data transmission.
114077 Rev. B
services
TCP/IP
2-1
Configuring BSC Transport Services
There are two main versions of the BSC protocol:
• BSC3, Interactive (BSC 3270)
Its primary-secondary architecture specifies that the primary device is
responsible for initiating connections and controlling the transmission data.
• BSC1, Batch (BSC 2780/3780)
It permits either side to initiate the connection and transfer data.
Bay Networks currently supports the BSC3 protocol.
Hosts and Control Units
A BSC host is typically a mainframe computer running the BSC protocol. BSC
devices communicate with hosts via control units. A control unit (CU) manages
the BSC devices that connect to it.
Transmitting BSC Frames over TCP
Data travels from one BSC device to another other using two routers: a primary
router and a secondary router. A primary router has an interface to the host, and a
secondary router has an interface to the control units. Because you can configure a
single router interface as either primary or secondary, a router with multiple
interfaces can support both primary and secondary operations.
igure 2-1 illustrates how a BSC device uses BTS to transmit data to a BSC host.
F
2-2 114077 Rev. B
BSC Transport Services Overview
Host
Front-end processor
FEP
CU
Secondary
router
Token
Ring
Ethernet
Figure 2-1. Tunneling of BSC Frames
BSC data travels between two routers using a process called tunneling. Tunneling
is independent of protocol differences between BSC devices and hosts.
The transfer process works like this:
1. A primary router interface transmits data to a secondary router interface.
2. The secondary router encapsulates the BSC data in a TCP/IP packet.
3. The secondary router transmits the packet over the IP network to the primary
router.
4. The primary router extracts the BSC data from the TCP/IP packet.
TCP/IP
T
u
n
n
Primary
router
g
n
i
l
e
BTS0001A
5. The primary router transmits the BSC data to the BSC host via a front-end
processor (FEP).
114077 Rev. B 2-3
Configuring BSC Transport Services
Point-to-Point and Multipoint Configurations
You can use BTS with point-to-point, multipoint, and virtual multipoint
configurations.
Point-to-Point Configuration
In a BTS point-to-point configuration, one control unit and one host connect via
one pair of routers (F
Secondary
router
TCP/IP
CU
igure 2-2).
Primary
router
FEP
Host
BTS0002A
Figure 2-2. BTS Point-to-Point Configuration
Multipoint Configuration
In a BTS multipoint configuration, up to 32 control units on the same line connect
to one host via one pair of routers (F
2-4 114077 Rev. B
igure 2-3).
Secondary
router
AN
COM1
CU
CU
CU
TCP/IP
Figure 2-3. BTS Multipoint Configuration
Primary
router
BSC Transport Services Overview
Host
FEP
BTS0004A
Virtual Multipoint Configuration
In a virtual BTS multipoint configuration, control units connect to secondary
routers, which link to the host via the primary router (F
control units can connect to the synchronous ports on each secondary router.
Using a virtual multipoint configuration, control units at different sites can
communicate with the host via the same line.
114077 Rev. B 2-5
igure 2-4). Up to 32
Configuring BSC Transport Services
Secondary
router
CU CU
CU
CU
CU CU
CU
CU
TCP/IP
Secondary
router
Primary
router
CU CU
CU
CU
Host
FEP
Secondary
router
BTS0005A
Figure 2-4. BTS Virtual Multipoint Configuration
2-6 114077 Rev. B
This chapter describes basic guidelines for implementing BTS on your network.
BTS Interfaces
You can enable the BOT application only on COM1 or COM2 interfaces on AN
routers. For ASN routers, select COM1 or COM2 on the Dual Sync module or
the Dual Sync/ISDN BRI module. For ARN routers, select the Serial adaptor
module. For BN routers, select up to eight COM ports on the Octal Sync module.
Chapter 3
Implementation Notes
When you enable BOT on an interface, you must specify whether the interface
• Connects to a host (primary connection) or a control unit (secondary
connection)
• Makes one (point-to-point) or many (multipoint) TCP connections
Only a primary interface can have many TCP connections.
Refer to Chapter 1 for information about starting BTS.
Peer Routers
When you enable BOT, you must assign at least one peer router. If you set up a
point-to-point BOT interface, you can assign only one peer router. If, however,
you set up a multipoint BOT interface, you can assign multiple peer routers, either
when you enable BOT or later.
When you assign a peer router, you must specify
• The IP address of the peer router
• Which of the two routers initiates the TCP connection
114077 Rev. B 3-1
Configuring BSC Transport Services
• The TCP ports the routers use for BOT
Caution: Do not specify a TCP port that you have assigned to another
application.
You must also configure the peer router so that the information for the router pair
matches. Refer to Chapter 4 for information about assigning peer routers.
Connections to Control Units
You can connect up to 32 control units on the same line that links to a secondary
router. The actual performance on the line directly relates to the number of control
units you connect.
In a multipoint or virtual multipoint configuration, you must configure the BOT
CU table on the primary router. This table contains the addresses of each control
unit the host can access.
You cannot configure the BOT CU table if the interface
• Connects to a control unit
• Makes a point-to-point connection
For a virtual multipoint configuration, the primary router can have more than one
peer router. For each peer router, you must specify the control units that the host
can access.
Line Details
Configuring line details for a bisynchronous line is similar to configuring line
details for a synchronous line. You need to specify the following information:
• Maximum frame size the router can transmit on this line
• Clock source for the timing signals
• Speed of the clock source
• Queue lengths for transmitting and receiving data
• Control character mode (EBCDIC or ASCII)
Refer to Chapter 4 for information about configuring line details.
3-2 114077 Rev. B
Chapter 4
Configuring BTS
When you enable BTS, default values are in effect for all parameters (see
Appendix C). Y ou can change these v alues to suit your network requirements. The
following sections describe your options.
Note: To edit BTS parameters, first configure at least one synchronous
interface (COM#) on an AN, ASN,ARN, or BN router. For ASN routers, make
sure you are using the Dual Sync or the Dual Sync/ISDN BRI network
module. For BN routers, use the Octal Sync module. For ARN routers, use the
Serial adaptor module. To initially configure an interface, or to add additional
synchronous interfaces, see Configuring Routers.
Using the MIB Object ID
The Technician Interface allows you to modify parameters by issuing set and
commit commands with the MIB object ID. This process is equivalent to
modifying parameters using Site Manager. For more information about using the
Technician Interface to access the MIB, refer to Using Technician Interface
Software.
Caution: The Technician Interf ace does not v erify that the value you enter for
a parameter is valid. Entering an invalid value can corrupt your configuration.
114077 Rev. B 4-1
Configuring BSC Transport Services
Accessing BTS Parameters
In Site Manager, either of these paths lead you to the BTS parameters:.
Site Manager Path 1: Configuration Manager > Protocols > BOT
Site Manager Path 2: Select a synchronous port that you have configured for BTS. The
Edit Connector window appears. Select Edit Circuit. The Circuit Definition window
appears. Use the BTS Circuit menu to access BTS parameters.
BTS parameters fall into the following categories:
• Global (Enable and Disable)
• Interface
• Peer
• Control Unit
• Line
Globally Enabling and Disabling BTS
You can globally enable or disable the system software mechanisms that use the
BTS interface on a synchronous circuit.
The Disable option switches every BTS interface on the router into an inactive
state. The Enable option reinitializes ev ery BTS interface on the router, with each
interface maintaining the most recent settings. The actual operating state of each
interface further depends on the current up/down state of the associated physical
circuit.
Site Manager Path: Configuration Manager > Protocols > BOT > Global. The Edit BOT
Global Parameters window appears. Click on Values. Select Enable | Disable. Click on
OK.
Enable parameter: page B-1
4-2 114077 Rev. B
Customizing BTS Interfaces
You can edit the following BTS settings on individual interfaces:
• Enabling and disabling BTS interfaces
• Attaching interfaces to primary and secondary connections
• Selecting an interface type
• Setting the TCP keepalive parameters
• Deleting a BTS interface
Site Manager Path: Configuration Manager > Protocols > BOT > Interfaces. The BOT
Interface window appears.
Enabling and Disabling BTS Interfaces
The Enable parameter allows you to enable or disable BTS on an interface. The
default setting is Enable.
Configuring BTS
Site Manager Path 1: Configuration Manager > Protocols > BOT > Interfaces. The BOT
Interface window appears. Select the interface to edit from the upper left window . Click on
Values . Select Enable | Disable.
Enable parameter: page B-1
Site Manager Path 2: Select a port that you have configured for BTS. The Edit Connector
window appears. Select Edit Circuit. The Circuit Definition window appears. Select
Protocols or Group Protocols > Edit BOT > Interface. The Edit BOT Interface window
appears. Click on Values. Select Enable | Disable.
Enable parameter: page B-1
Creating Primary and Secondary Connections
The Interface Attached To parameter specifies whether this interface connects to a
host (primary connection) or a control unit (secondary connection). Specify either
Primary or Secondary. The router does not provide a default for this setting.
Site Manager: Interface Attached To: page B-2
114077 Rev. B 4-3
Configuring BSC Transport Services
Selecting an Interface Type
The Interface Type parameter specifies whether the interface has one or many
TCP connections. Point-to-point provides one TCP connection to the peer router.
Multipoint provides many TCP connections to one or more peer routers. A
multipoint connection can also be one TCP connection with multiple CUs. A
primary interface can have either a point-to-point or multipoint connection. A
secondary interface can have only a point-to-point connection.
Specify either Point-to-Point or Multipoint. The default setting is Point-to-Point.
Site Manager: Interface Type: page B-2
Setting the TCP Keepalive Parameters
The TCP Keepalive Interval parameter specifies how often the router sends a
signal to the peer router to check that the peer router is working correctly and can
receive messages. You enable the parameter by specifying a nonzero value.
When a keepalive packet goes unacknowledged by the remote peer,
retransmission begins at the local peer router. You should tune the keepalive
interval based on the total time it takes to send and receive acknowledgment from
the remote peer.
Since keepalive packets are only sent on idle lines, increasing the keepalive
interval may decrease the cost of an idle network. In b usy networks, the k eepalive
interval is not necessary. Frequent traffic for TCP transmission performs the same
function as a keepalive setting.
Enter a value appropriate for the network in the range 0 to 86400 seconds. We
recommend that you set this parameter to the same value on the peer router to
maintain synchronization. The default setting is 120 seconds.
Site Manager: TCP Keepalive Int (sec): page B-3
4-4 114077 Rev. B
Configuring BTS
The TCP Keepalive Retry Timeout parameter specifies the maximum time
between successive retransmissions of keepali ve packets. If an ackno wledgment is
not received by the local peer router within the TCP keepalive retry timeout, the
local peer router retransmits the keepalive packet. The router continues to
retransmit keepalive packets at every TCP keepalive retry timeout until it recei v es
an acknowledgment from the remote peer , or until TCP reaches the keepali ve retry
count setting.
Enter a value in the range 0 to 600 seconds. The default setting for the TCP
Keepalive Retry timeout is 4 seconds.
Site Manager: TCP Keepalive Retry Timeout (sec): page B-3
TCP determines a lost connection (either a failed link with no rerouting possible,
or the remote router is unavailable) when TCP attempts to deliver data. If TCP
does not receive an acknowledgment to transmitted keepalive packets after a
series of retries, it declares the connection inoperable and informs BTS. The TCP
Keepalive Retry Count is the number of times TCP attempts to establish or
maintain a connection.
Enter a value in the range 0 to 99. The default setting is 5 attempts.
Site Manager: TCP Keepalive Retry Count (sec): page B-4
Deleting a BTS Interface
To delete a BTS interface from its associated physical circuit, follow this path:
Site Manager Path: At the Configuration Manager window, select Circuits > Delete
Circuit. The Circuit List window appears. Select the interface to delete from the upper left
window. Click on Delete. The Delete Circuit window appears. Click on Delete.
Note: Whenever you delete a BOT interface, the router will continue to run
TCP if other applications on the router require TCP services.
114077 Rev. B 4-5
Configuring BSC Transport Services
Assigning Peer Routers
When you enable BTS on a router, you must assign at least one peer router. If you
set up a point-to-point BTS interface, you can assign only one peer router. If,
however, you set up a multipoint BTS interface, you can assign multiple peer
routers, either when you enable BTS or later.
Site Manager Path: Configuration Manager > Protocols > BOT > Interfaces. Select Peer
Table. The BOT Peer Table Configuration window appears. Click on Add. The Add BOT
Peer Entry window appears.
Configure the parameters in the window. Click on OK. The BOT Peer Table Configuration
window reappears with the peer entry that you just added.
When you configure a peer router, the software automatically enables the TCP
connection to that router. To later disable a connection to a peer router, refer to
bling and Disabling BTS Peer Connections,” later in this section.
“Ena
Specifying the Peer IP Address
The Peer IP Address parameter allows you to specify the IP address of a peer
router. Use any valid IP address in dotted decimal notation.
Site Manager: Peer IP Address parameter: page B-4
Selecting the Connection Originator
When you configure a connection, you need to decide which router initiates the
TCP connection, either the local peer router or the remote peer router. If the local
peer router is the TCP connection initiator, then you configure it as Self and you
configure the remote peer as Partner.
The Connection Originator parameter setting controls whether the local router
(Self) or the remote peer router (Partner) initiates the TCP connection. Select Self
or Partner . Be sure to set this parameter on the peer router to the other v alue. There
is no default setting.
Site Manager: Connection Originator parameter: page B-5
4-6 114077 Rev. B
Setting the TCP Listen Ports
The Local TCP Listen Port parameter specifies the TCP port number that this
router uses to establish a TCP connection. This parameter is acti v e only when you
set the Connection Originator parameter to Partner.
Enter a valid, available port number for this router in the range 1000 to 9999. Be
sure to use the same value for the Peer TCP Listen Port parameter on the peer
router.
Site Manager: Local TCP Listen Port parameter: page B-5
The Peer TCP Listen Port parameter specifies the TCP port that the peer router
uses to establish a TCP connection. This parameter is acti ve only when you set the
connection originator parameter to Self.
Enter an available port number for the peer router in the range 1000 to 9999. Be
sure to use the same value for the Local TCP Listen Port parameter on the peer
router.
Configuring BTS
Site Manager: Peer TCP Listen Port parameter: page B-6
Enabling and Disabling BTS Peer Connections
When you configure a peer router, the local router automatically enables the TCP
connection to the peer. You can disable and reenable the connection to a peer
router.
Site Manager Path: Configuration Manager > Protocols > BOT > Interfaces. Click on
Peer Table. The BOT Peer Table Configuration window appears.
Select a peer connection from the list window. Click on Values. Select Enable | Disable.
Click on Apply.
Enable parameter: page B-4.
114077 Rev. B 4-7
Configuring BSC Transport Services
Creating Connections to Control Units
In a multipoint or virtual multipoint configuration, you must configure the BOT
CU Table on the primary router. This table contains the addresses of each control
unit that the host can access.
You cannot configure the BOT CU Table if the interface
• Connects to a control unit
• Makes a point-to-point connection
In a virtual multipoint configuration, the primary router can have more than one
peer router. Each peer router has a corresponding entry in the BO T Peer Table. For
each entry, you must specify the control units that the host can access.
Site Manager Path: Configuration Manager > Protocols > BOT > Interfaces. Click on
Peer Table. The BOT Peer Table Configuration window appears.
Select a peer connection from the list window. Click on CU Table. The BOT CU Table
Configuration window appears.
Click on Add. The Add BOT CU Entry window appears.
Entering the Control Unit Address
The control unit address is a hexadecimal value in the range 0x40 to 0xFE. Refer
to Appendix A for guidelines.
Site Manager: Control Unit Address (hex) parameter: page B-6
When you add an entry to the BOT CU Table, the software automatically enables
the TCP connection to that control unit. To disable the connection later, refer to
the next section, “Ena
4-8 114077 Rev. B
bling and Disabling a Connection to a Control Unit.”
Enabling and Disabling a Connection to a Control Unit
You can disable or reenable the connection to a control unit with the Enable
parameter. If you disable the connection to the control unit, the TCP connection
remains active, but unused until the you reenable the connection. The default
setting is Enable.
Site Manager Path: Configuration Manager > Protocols > BOT > Interfaces. Click on
Peer Table. The BOT Peer Table Configuration window appears.
Select a peer connection from the list window. Click on CU Table. The BOT CU Table
Configuration window appears. Select a control unit from the list of entries. Select the
Enable parameter. Click on Values. Select Enable | Disable.
Click on Apply. Click on Done.
Enable parameter: page B-4.
Editing Line Parameters
Configuring BTS
This section describes the parameters you can modify for each BTS line. The
parameters are
• Enable
• MTU (maximum transmission unit) size
• Clock source and clock speed
• Configured transmit and receive queue length
• Control character mode
• Request to send (RTS) enable
• External clock speed
Site Manager Path: Select a port that you have configured for BTS. The Edit Connector
window appears. Select Edit Line. The Edit BISYNC Parameters window appears. Edit
the line parameters. Click on OK to save the changes.
114077 Rev. B 4-9
Configuring BSC Transport Services
Enabling the Line
The Enable parameter enables and disables the line on which you have BTS
running. The default setting is Enable.
Site Manager: Enable parameter: page B-6
Setting the Transmission Frame Size
The MTU Size parameter specifies the largest frame that the router can transmit
across this bisynchronous line. Enter a value in the range 1 to 4568. The default
setting is 1580.
Site Manager: MTU Size parameter: page B-7
Adjusting the Bisynchronous Timing Signals
The Clock Source parameter specifies the origin of the bisynchronous timing
signals. If you set this parameter to Internal, this router supplies the required
timing signals. If you set this parameter to External, an external network device
supplies the required timing signals. The default setting is External.
Select the clocking mode, as appropriate for the network. Be sure to attach the
appropriate cable to your router for either an internal or external clocking source
(see the cable guide for information).
Site Manager: Clock Source parameter: page B-7
The Clock Speed parameter sets the clock speed when you use the router to
supply clocking signals. The allowable settings are: 1200, 2400, 4800, 7200,
9600, and 19200. The default setting is 9600.
Set the Clock Speed parameter to the desired data transmission rate across the
bisynchronous line, and set the Clock Source parameter to Internal.
Site Manager: Clock Speed parameter: page B-8
4-10 114077 Rev. B
The External Clock Speed parameter sets the clock speed when you use an
external source to supply clocking signals.
Enter the value in the range 1200 to 19200 bits/sec that most closely corresponds
to the speed of the external clock, and set the Clock Source parameter to external.
The default setting is 9600.
Site Manager: External Clock Speed parameter: page B-9
Adjusting the Transmission Queues
The Configured Transmit Queue Length parameter specifies the length of the
transmit queue. If you set this parameter to 0, the router selects an appropriate
value; otherwise, the router uses the length you specify. If you enter a value that is
larger than the number of buffers the router reserves for transmitting data, the
router reduces the value to a usable size.
Accept the default value (0) or enter a value in the range 0 to 255 that is
appropriate for this line.
Configuring BTS
Site Manager: Configured Transmit Q Length parameter: page B-8
The Configured Receive Queue Length parameter specifies the length of the
receive queue. If you set this parameter to 0, the router selects an appropriate
value; otherwise, the router uses the length you specify. If you enter a value that is
larger than the number of buffers the router reserves for receiving data (the
compiled ring size), the router reduces the value to the compiled ring size.
Accept the default value (0) or enter a value in the range 0 to 255 that is
appropriate for this line.
Site Manager: Configured Receive Q Length parameter: page B-8
Setting the Control Character Mode
The Control Character Mode parameter specifies the code set that the BSC
protocol uses. The bisynchronous link layers use control characters to identify
frames. EBCDIC is more common than ASCII.
114077 Rev. B 4-11
Configuring BSC Transport Services
Select EBCDIC or ASCII. The default setting is EBCDIC.
Site Manager: Control Character Mode parameter: page B-9
Enabling and Disabling RTS and CTS Signal Detection
The RTS Enable parameter enables or disables the detection of request-to-send
(RTS) and clear-to-send (CTS) signals on this interface. Set this parameter to
enable if the connected device (for example, a modem) uses RTS/CTS flow
control. The default setting is Disable.
Site Manager: RTS Enable parameter: page B-9
4-12 114077 Rev. B
Appendix A
Control Unit Addresses
To specify a connection to a control unit, you enter the control unit’s address.
able A-1 shows the addresses to use for BSC3.
T
Table A-1. Device Address Table for BSC3
Control Unit or
Device Position
0 0x40
1 0xC1
2 0xC2
3 0xC3
4 0xC4
5 0xC5
6 0xC6
7 0xC7
8 0xC8
9 0xC9
10 0x4A
11 0x4B
12 0x4C
13 0x4D
14 0x4E
15 0x4F
16 0x50
Control Unit Address
(continued)
114077 Rev. B A-1
Configuring BSC Transport Services
Table A-1. Device Address Table for BSC3
Control Unit or
Device Position
17 0xD1
18 0xD2
19 0xD3
20 0xD4
21 0xD5
22 0xD6
23 0xD7
24 0xD8
25 0xD9
26 0x5A
27 0x5B
28 0x5C
29 0x5D
30 0x5E
31 0x5F
Control Unit Address
(continued)
A-2 114077 Rev. B
BTS Global Parameters
Parameter: Enable
Path: Configuration Manager > Protocols > BOT > Global
Default: Enable
Options: Enable
Function: Enables or disables BOT on this interface.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.1.2
| Disable
Appendix B
BTS Parameters
BTS Interface Parameters
Parameter: Enable
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: Enable
Options: Enable
Function: Enables or disables BOT on this interface.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.2
114077 Rev. B B-1
| Disable
Configuring BSC Transport Services
Parameter: Interface Attached To
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: None
Options: Primary
Function: Specifies whether this interface connects to a host (primary connection) or a
control unit (secondary connection).
Instructions: Select Primary or Secondary.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.7
Parameter: Interface Type
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: Point-to-Point
Options: Point-to-Point
Function: Specifies whether the interface has one or many TCP connections.
Point-to-point provides one TCP connection to the peer router. Multipoint
provides many TCP connections to one or more peer routers. A multipoint
connection can also be one TCP connection with multiple CUs. A primary
interface can have either a point-to-point or multipoint connection. A secondary
interface can have only a point-to-point connection.
Instructions: If this is a primary connection, select point-to-point or multipoint; if this is a
secondary connection, accept point-to-point.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.6
| Secondary
| Multipoint
B-2 114077 Rev. B
BTS Parameters
Parameter: TCP Keepalive Int (sec)
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: 120
Options: 0 to 86400 seconds
Function: Specifies how often the router sends a signal to the peer router to check that the
peer router is working correctly and can receive messages.
When a keepalive packet goes unacknowledged by the remote peer,
retransmission begins at the local peer router. You should tune the keepalive
interval based on the total time it takes to send and receive acknowledgment
from the remote peer.
Since keepalive packets are only sent on idle lines, increasing the Keepalive
interval may decrease the cost of an idle network. In busy networks, the
keepalive interval is not necessary. Frequent traffic for TCP transmission
performs the same function as a keepalive setting.
Instructions: Enter a value appropriate for the network. We recommend that you set this
parameter to the same value on the peer router to maintain synchronization.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.9
Parameter: TCP Keepalive Retry Timeout (sec)
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: 4
Options: 0 to 600 seconds
Function: Specifies the maximum time between successive retransmissions of keepalive
packets. If an acknowledgment is not received by the local peer router within
the TCP keepalive retry timeout, the local peer router retransmits the keepalive
packet. The router continues to retransmit keepalive packets at every TCP
keepalive retry timeout until it receives an acknowledgment from the remote
peer, or until TCP reaches the keepalive retry count setting.
Instructions: Enter a value in the range 0 to 600.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.10
114077 Rev. B B-3
Configuring BSC Transport Services
Parameter: TCP Keepalive Retry Count
Path: Configuration Manager > Protocols > BOT > Interfaces
Default: 5
Options: 0 to 99 seconds
Function: Specifies the number of TCP attempts to establish or maintain a connection. If
TCP does not receive an ackno wledgment after a series of retries, it declares the
connection inoperable and informs BOT.
Instructions: Enter a value in the range 0 to 99 seconds.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.2.1.11
BTS Peer Table Parameters
Parameter: Enable
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table
Default: Enable
Options: Enable
Function: Enables or disables the TCP connection to this peer router interface.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.2
| Disable
Parameter: Peer IP Address
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on Add
Default: None
Options: Any valid IP address
Function: Specifies the IP address of the peer router.
Instructions: Enter the peer router’s IP address in dotted decimal notation.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.5
B-4 114077 Rev. B
BTS Parameters
Parameter: Connection Originator
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on Add
Default: None
Options: Self | Partner
Function: Determines whether this router (Self) or the peer router (Partner) initiates the
TCP connection.
Instructions: Select Self or Partner. Be sure to set this parameter on the peer router to the
other value.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.6
Parameter: Local TCP Listen Port
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on Add
Default: None
Options: 1000 to 9999
Function: Specifies the TCP port number that this router uses to establish a TCP
connection. This parameter is active only when you set the Connection
Originator parameter to Partner.
Instructions: Enter a valid, available port number for this router. Be sure to use the same
value for the Peer TCP Listen Port parameter on the peer router.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.7
114077 Rev. B B-5
Configuring BSC Transport Services
Parameter: Peer TCP Listen Port
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on Add
Default: None
Options: 1000 to 9999
Function: Specifies the TCP port that the peer router uses to establish a TCP connection.
This parameter is active only when you set the Connection Originator parameter
to Self.
Instructions: Enter a valid, available port number for the peer router. Be sure to use the same
value for the Local TCP Listen Port parameter on the peer router.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.8
BOT CU Table Parameters
Parameter: Control Unit Address
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on CU Table > Click on Add
Default: None
Options: 0x40 to 0xFE
Function: Specifies the address of the control unit.
Instructions: Enter the address of the control unit, in hexadecimal format.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.3.1.8
Parameter: Enable
Path: Configuration Manager > Protocols > BOT > Interfaces > Click on Peer Table >
Click on CU Table
Default: Enable
Options: Enable | Disable
Function: Enables or disables this control unit.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.5.18.4.1.2
B-6 114077 Rev. B
BTS Parameters
Line Parameters
Parameter: Enable
Path: Configuration Manager > Select connector > Edit Line
Default: Enable
Options: Enable
Function: Enables or disables this line.
Instructions: Select Enable or Disable.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.2
Parameter: MTU Size
Path: Configuration Manager > Select connector > Edit Line
Default: 1580
Options: 1 to 4568 bytes
Function: Specifies the largest frame that the router can transmit across this bisynchronous
line.
Instructions: Specify a value appropriate for the network.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.4
| Disable
Parameter: Clock Source
Path: Configuration Manager > Select connector > Edit Line
Default: External
Options: External | Internal
Function: Specifies the origin of the bisynchronous timing signals. If you set this
parameter to Internal, the router supplies the required timing signals. If you set
this parameter to External, an external network device supplies the required
timing signals.
Instructions: Select the clocking mode, as appropriate for the network. Be sure to attach the
appropriate cable to your router for an internal or external clocking source (see
the cable guide for information).
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.7
114077 Rev. B B-7
Configuring BSC Transport Services
Parameter: Clock Speed
Path: Configuration Manager > Select connector > Edit Line
Default: 9600
Options: 1200 B | 2400 B | 4800 B | 7200 B | 9600 B | 19200 B
Function: Sets the clock speed when you use the router to supply clocking signals.
Instructions: Set the Clock Speed parameter to the desired data transmission rate across the
bisynchronous line, and set the Clock Source parameter to Internal.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.8
Parameter: Configured Transmit Q Length
Path: Configuration Manager > Select connector > Edit Line
Default: 0
Options: 0 to 255
Function: Specifies the length of the transmit queue. If you set this parameter to 0, the
router selects an appropriate value; otherwise, the router uses the length you
specify. If you enter a value that is larger than the number of buffers the router
reserves for transmitting data (the compiled ring size), the router reduces the
value to the compiled ring size.
Instructions: Accept the default or enter a value that is appropriate for this line.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.10
Parameter: Configured Receive Q Length
Path: Configuration Manager > Select connector > Edit Line
Default: 0
Options: 0 to 255
Function: Specifies the length of the receive queue. If you set this parameter to 0, the
router selects an appropriate value; otherwise, the router uses the length you
specify. If you enter a value that is larger than the number of buffers the router
reserves for receiving data (the compiled ring size), the router reduces the v alue
to the compiled ring size.
Instructions: Accept the default or enter a value that is appropriate for this line.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.11
B-8 114077 Rev. B
BTS Parameters
Parameter: Control Character Mode
Path: Configuration Manager > Select connector > Edit Line
Default: EBCDIC
Options: EBCDIC | ASCII
Function: Specifies the code set that the BSC protocol uses. The BSC link layers use
control characters to identify frames. EBCDIC is more common than ASCII.
Instructions: Select EBCDIC or ASCII.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.12
Parameter: External Clock Speed
Path: Configuration Manager > Select connector > Edit Line
Default: 9600
Options: 1200 to 19200 bits/sec
Function: Sets the clock speed when you use an external source to supply clocking
signals.
Instructions: Enter the value that most closely corresponds to the speed of the external clock,
and set the Clock Source parameter to External.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.15
Parameter: RTS Enable
Path: Configuration Manager > Select connector > Edit Line
Default: Disable
Options: Enable | Disable
Function: Enables or disables the detection of request to send (RTS) and clear to send
(CTS) signals on this interface.
Instructions: Set this parameter to Enable if the connected device (for example, a modem)
uses RTS/CTS flow control.
MIB Object ID: 1.3.6.1.4.1.18.3.4.27.1.1.14
114077 Rev. B B-9
Appendix C
Default Values for BTS Parameters
Tables C-1 through C-4 list the Site Manager default parameter settings for BTS.
Table C-1. Interface Parameters
Parameter Default
Enable Enable
Interface Attached To None
Interface Type Point-to-Point
TCP Keepalive Int(erval) 120 seconds
TCP Keepalive Retry Timeout 4 seconds
TCP Keepalive Retry Count 5
Table C-2. Peer Entry Parameters
Parameter Default
Peer IP Address None
Connection Originator None
Local TCP Listen Port None
Peer TCP Listen Port None
Enable Enable
114077 Rev. B C-1
Configuring BSC Transport Services
Table C-3. Control Unit Parameters
Parameter Default
Control Unit Address None
Enable Enable
Table C-4. Line Parameters
Parameter Default
Enable Enable
MTU Size 1580
Clock Source External
Clock Speed 9600
Configured Transmit Q Length 0
Configured Receive Q Length 0
Control Character Mode EBCDIC
RTS Enable Disabled
External Clock Speed 9600
C-2 114077 Rev. B
A
assigning peer routers, 3-1, 4-6
B
Bay Networks
publications, ordering, xv
BOT (Bisync over TCP)
control unit connection parameters
Control Unit Address, 4-9, B-6
Enable, 4-9, B-6
global parameters
Enable and Disable, 4-2
interface parameters
default values, C-1
Enable, 4-2, 4-3, B-1
Interface Attached To, 4-4, B-2
Interface Type, 4-4, 4-5, B-2
TCP Keepalive Int, 4-5, B-3
TCP Keepalive Retry Count, 4-5, B-4
TCP Keepalive Retry Timeout, 4-5, B-3
line parameters
Clock Source, 4-10, B-7
Clock Speed, 4-11, B-8
Configured Receive Q Length, 4-12, B-8
Configured Transmit Q Length, 4-11, B-8
Control Character Mode, 4-12, B-9
Enable, 4-10, B-7
External Clock Speed, 4-11, B-9
MTU Size, 4-10, B-7
RTS Enable, 4-12, B-9
peer table parameters
Connection Originator, 4-7, B-5
Enable, 4-8, B-4
Local TCP Listen Port, 4-7, B-5
Peer IP Address, 4-6, B-4
Index
Peer TCP Listen Port, 4-7, B-6
BSC (Binary Synchronous Communication)
host, 2-2
protocol, 2-1
BSC1 overview, 2-2
BSC3 overview, 2-2
BTS (BSC Transport Services)
parameters
accessing BOT in Site Manager, 4-2
preparing a configuration file for, 1-1
supported network modules, 4-1
supported routers, 1-1, 4-1
C
Clock Source parameter, 4-10, B-7
Clock Speed parameter, 4-11, B-8
CompuServe, Bay Networks forum on, xx
Configured Receive Q Length parameter, 4-12,
B-8
Configured Transmit Q Length parameter, 4-11,
B-8
Connection Originator parameter, 4-7, B-5
connections to control units
disabling, 4-9
enabling, 4-9
specifying, 3-2, 4-8, A-1
Control Character Mode parameter, 4-12, B-9
Control Unit Address parameter, 4-9, B-6
control unit parameters
Control Unit Address, 4-9, B-6
default values, C-2
114077 Rev. B Index-1
Configuring BSC Transport Services
Enable, 4-9, B-6
control units, 2-2
addresses, A-1
Customer Service FTP, xix
customer support, xvii
customer support programs, xviii
D
deleting
BTS from all circuits, 1-2
BTS on an interface, 4-5
disabling
a Bisync line, 4-10, B-7
connections to control units, 4-9
connections to peer routers, 4-8
Dual Sync module, 1-1
Dual Sync/ISDN BRI module, 1-1
E
editing BTS
global parameters, 4-2
interface parameters, 4-3 to 4-5
Enable parameter
for BTS, 4-2, B-1
for control unit, 4-9, B-6
for line, 4-10, B-7
for peer entry, 4-8, B-4
enabling
a Bisync line, 4-10, B-7
connections to control units, 4-9
connections to peer routers, 4-8
External Clock Speed parameter, 4-11, B-9
H
host, BSC, 2-2
I
implementation notes, 3-1
InfoFACTS service, xxi
Interface Attached To parameter, 4-4, B-2
Interface Type parameter, 4-4, B-2
interfaces, deleting BTS, 4-5
L
line details, 3-2
line parameters
Clock Source, 4-10, B-7
Clock Speed, 4-11, B-8
Configured Receive Q Length, 4-12, B-8
Configured Transmit Q Length, 4-11, B-8
Control Character Mode, 4-12, B-9
default values, C-2
Enable, 4-10, B-7
External Clock Speed, 4-11, B-9
MTU Size, 4-10, B-7
RTS Enable, 4-12, B-9
Local TCP Listen Port parameter, 4-7, B-5
M
MTU Size parameter, 4-10, B-7
multipoint configuration, 2-4, 3-2, 4-8
O
Octal Sync module, 1-1
overview of BSC Transport Services (BTS), 2-1
P
peer entry parameters
Connection Originator, 4-7, B-5
default values, C-1
Enable, 4-8, B-4
Local TCP Listen Port, 4-7, B-5
Peer IP Address, 4-6, B-4
Peer TCP Listen Port, 4-7, B-6
Peer IP Address parameter, 4-6, B-4
peer routers, assigning, 3-1, 4-6
Index-2 114077 Rev. B
Peer TCP Listen Port parameter, 4-7, B-6
point-to-point configuration, 2-4
R
RTS Enable parameter, 4-12, B-9
S
Serial adaptor module, 1-1, 3-1, 4-1
specifying connections to control units, 3-2, 4-8
starting BTS, 1-2
Support Source CD, xx
T
TCP Keepalive Int parameter, 4-5, B-3
TCP Keepalive Retry Count parameter, 4-5, B-4
TCP Keepalive Retry Timeout parameter, 4-5,
B-3
Technical Response Centers, xxi
technical support, xvii
Technician Interface, 4-1
Transmission of BSC frames over TCP, 2-2
tunneling, 2-3
Index
V
virtual multipoint configuration, 2-5, 3-2, 4-8
W
World Wide Web, Bay Networks home page on,
xix
114077 Rev. B Index-3
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