Datatek DT-6061 Manuale utente

DT-6061

USER’S MANUAL

IP-PAD A

PPLICATION

VERSION 1.0.16

721 Route 202-206

Bridgewater, NJ 08807

fax: 908.218.1736

phone: 908.218.0500

email: sales@datatekcorp.com

http://www.datatekcorp.com

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CONTENTS

1 INTRODUCTION.....................................................................................................................4

1.1 DT-6061 WITH IP-PAD APPLICATION (TYPICAL CONFIGURATION)...........................................4

1.2 APPLICATION SPECIFICATIONS ...............................................................................................5

1.3 APPLICATION BASIC ARCHITECTURE & OPERATION.................................................................5

1.4 IP-PAD APPLICATION CONFIGURATION..................................................................................6

2 APPLICATIONS COMMANDS...............................................................................................7

2.1 INPUT CONVENTIONS.............................................................................................................7

2.2 LOGIN ...................................................................................................................................7

2.3 LOGOUT................................................................................................................................7

3 APPLICATION SOFTWARE INSTALLATION & UPGRADE ..............................................12

4APPENDIX A – IP-PAD MEASUREMENTS AVAILABLE...................................................13

5 SUPPORT FOR X.3 PAD PARAMETER VALUES..............................................................14

6 WARRANTY..........................................................................................................................16

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1 INTRODUCTION

The IP-PAD Application eliminates the need, complexity, or expense of specialized X.25

equipment and allows any available port on a DT-4000, DT-2020 connected SAM, or BNS

endpoint such as a SAM port, to be used for Network Element (NE) access.

The IP-PAD Application of the DT-6061 allows an X.25 device to be connected to a synchronous

port anywhere in the network. Supporting both X.3 PAD and Pass-Through functionality on a per

virtual circuit basis, IP-PAD Application connections to virtual circuits on an X.25 port are

provided with a telnet TCP/IP connection.

The following diagram depicts a configuration of BNS network elements and non-BNS network

elements with BNS/non-BNS hosts that require access to those network elements.

1.1 DT-6061 WITH IP-PAD APPLICATION (TYPICAL CONFIGURATION)

S A M

Node

X.25

Network Element

MFiber

X.25

Network

DT-6061

DT-4000

IP IP

BNS Host

IP Hosts

Network Elements

In the above configuration, there is one circuit carrying X.25 LAPB frames from the DT-6061 to a

DT-4000 connected Network Element (NE) or a SAM connected NE. The X.25 Network Element

may be anywhere on the available networks

(both BNS and IP)

as the above diagram depicts

Hosts access the virtual circuits on these Network Elements via a TCP port number. BNS Hosts

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access the virtual circuit via the UMI1. The same is true of terminal and PC devices on either the

BNS or the IP network.

1.2 APPLICATION SPECIFICATIONS

Number of X.25 devices per DT-6061 30+

Number of Virtual Circuits per X.25 Device 1-100

PAD Service Yes (Per Virtual Circuit)

X.25 Pass-Through Service Yes (Per Virtual Circuit)

Number of OA&M Channels available One per X.25 device.

Measurements Available LAPB, Packet Layer PAD, Byte Counts,Error Counts

Alarms Yes

SNMP (DT-6061 Agent) Yes

1.3 APPLICATION BASIC ARCHITECTURE & OPERATION

1.3.1 INTERFACE TYPES

There are three distinct interface types on the IP-PAD application.

The Configuration Circuits

This interface type is used for configuration and administration of the IP-PAD application for a

particular X.25 connection via Telnet.

The Virtual X.25 Line Circuits

For this interface type, one virtual X.25 line is configured to receive on a TCP Port. This TCP port

will then listen for the TCP call from the DT-4000, UMI, etc. The specific TCP port used is the

configured base + 0.

The X.25 VCC (via X.3 PAD) Circuits.

For this interface type, one TCP port is configured per VCC on the X.25 line. These TCP ports will

listen for a call from an endpoint that requires access to the VCC. The specific TCP ports used

begin at the configured base + 1 for X.25 VCC 1, and increment in proportion.

1.3.2 CIRCUIT USAGE EXAMPLE

The IP-PAD application would have its X.25 line, and per circuit configuration entered. This

includes the base TCP port number that establishes the range of TCP ports relating to that X.25

line.

Once restored to service, the X.25 line TCP port (offset 0 from the base) listens for in inbound call

from a DT-4000, UMI, or DT-2020/SAM port. This establishes the connectivity with the remote

X.25 network element endpoint.

The VCC TCP ports (offset 1 – Number of Virtual Circuits) will listen on their respective TCP ports

for inbound calls as well. Any host, or other IP endpoint, may make a telnet call to these TCP

ports for per virtual circuit connectivity to the X.25 network element.

1The UMI allows both synchronous and asynchronous endpoints connected to a BNS network to access

endpoints on an IP network. Similarly, endpoints on an IP network can access both synchronous and

asynchronous endpoints on a BNS network.

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1.4 IP-PAD APPLICATION CONFIGURATION

The configuration of the X.25 application takes place on its OA&M port. That is TCP port number

10000 + its instance number in the DT-6061.

The configuration required for the IP-PAD application is:

•

Per application:

This is the TCP port number to be used as a base for a range of TCP ports

the application instance shall use. The synchronous transport to the X.25 network element

occurs at offset zero to this base TCP port number. The individual X.25 virtual circuits are

identified by the base TCP port number plus the X.25 virtual circuit port number.

•

Per X.25 line:

These consist the LAPB transmission window size and other link layer

parameters.

•

Per X.25 VCC:

These consist of the PAD profile associated with the VCC, the window size to

be used for transmission in the X.25 packet layer, and other parameters associated on a per

virtual circuit basis.

The Per X.25 Line Configuration parameters are as follows:

Parameter Values Default Units

X.25 Logical Line Type2DTE, DCE DCE

Number of X.25 VCs 16

Default Max Packet Size3128, 256 256 Bytes

LAPB Tx Window Size 1-7 2 Frames

Waiting ACK Time (T1) 1-60 3 Seconds

Maximum Attempts to complete a Transmission

(N2) 1-255 7 Seconds

Action when N2 Count Exceeded4Disc, reset. Reset

Action when DISC received5Disc, reset. Reset

The per VCC configuration parameters are as follows:

Parameter Values Default Units

Packet Layer Window 1-7 2 Packets

PAD Inactivity Timer (T) 2-20, OFF OFF Seconds

Profile ID Value, Transparent Transparent

2The IP-PAD application currently supports only the DCE end of the X.25 connection. All

Network Elements known to date are DTE.

3The 1980 standard provided for 128 byte packet sizes. The 1984 standard increased the

maximum size to 256 bytes. Later standards have optionally increased that number. However,

nearly all implementations of X.25 follow the 1984 standard, and it is considered the default for all

implementations known to date.

4The IP-PAD application currently supports only X.25 PVCs. As such a DISC action is not

defined.

5Receipt of a DISC on an X.25 PVC is not valid. This is not currently supported.

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2 APPLICATIONS COMMANDS

The DT-6061 software is composed of two components. One component, called the

Platform,

exists to support all applications. The second component is comprised of the individual

application

(s)

The

Platform

provides Operating System functions, selected interfaces, protocol stacks, SNMP

functions, and system OA&M while each application uses the services of the resident

Platform

2.1 INPUT CONVENTIONS

All parameters may be given on the command line. Parameters of the form name=<value> may

be given in any order.

For several complex commands, listed below, missing parameters, or corrections of errors in

given parameters, of the form name=<value> are collected by prompting the console user. The

user responds to a prompt for the name by typing the required <value> followed by

newline

Defaults are supplied in some cases, so the user need only enter

newline

Commands may be entered in upper or lower case.

Parameters of the form name=value may use upper or lower case for name.

Default values, if any, are shown in parenthesis as part of the prompt.

Case is preserved for values.

When a password is being requested by a prompt, input is not echoed.

Backspace erases one character and @deletes the current line of input. Most commands are

killed by del key.

2.2 LOGIN

Syntax: login PASSWD=<password>

(The default password is “initial”)

The login command is used to allow access to the other configuration commands.

The PASSWD parameter is not echo suppressed. However, if the PASSWD parameter is not

provided, the console prompts for a password; the response

echo-suppressed in this case.

If the password is valid, the user is placed in the

logged in

mode. Once the console user is logged

, the balance of the commands are accessible.

Note: Every application instance might be assigned a different password.

2.3 LOGOUT

Syntax: logout

The logout command is only allowed if the console user is logged

. It uses no arguments. It will

set the console to the logged

out

mode. The console may also be logged out by typing

exit

ctrl-D

Passwords are up to seven characters in length. The characters are alphanumeric and special

characters are not allowed.

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2.3.1 HELP

Syntax: help

The help command is always visible. The help command displays the currently allowed

commands for the mode that the unit is currently entered.

2.3.2 VERSION

Syntax: ver

The version command is only visible when the application is

logged in

. The command has no

arguments. It displays the current software and database revisions of the application.

2.3.3 PLACING COMPONENTS IN SERVICE

Syntax: rs <link | <vc XXX>>

The restore command is only visible when the application is

logged in

. The command is used to

place the X.25 Link, or any of the X.25 virtual circuits, into service. A TCP connection is not

available until the component is placed into service.

At least one argument is required. That argument is the component type to be placed into service.

There is only a single X.25 link, and multiple X.25 virtual circuits on that link which may be

individually brought into service.

Once the component is brought into service, it will await a TCP session if the connection type is

rcv. If the connection type is orig, a TCP session will be established with the endpoint specified

in the component configuration. Please see the sections that follow for configuration of both the

link, and the virtual circuits.

2.3.4 TAKING COMPONENTS OUT OF SERVICE

Syntax: rm <link | <vc XXX>>

The remove command is only visible when the application is

logged in

. The command is used to

place the X.25 Link, or any of the X.25 virtual circuits, out of service. Any TCP connection using

those components is automatically taken down when the component is removed from service.

At least one argument is required. That argument is the component type to be removed from

service. There is only a single X.25 link, and multiple X.25 virtual circuits on that link which may

be individually removed from service.

2.3.5 CONFIGURING GENERAL & LINK PARAMETERS

Syntax: link [base=<TCP Port#>] [type=<RCV|ORIG>] [dest=<IP Address>]

[dport=<TCP Port>] [numvcc=<#VCC>] [win=<#>] [T1=<#>] [N2=<#>]

The link command is only visible when the application is logged in. The command is used to

configure a Virtual X.25 line termination.

The base parameter is the TCP port number base at which the X.25 line, and the associated

X.25 virtual circuits, are to be IP terminated. The default is computed as follows:

Default TCP Base=((<Application Instance# > -1)*200)+30000

For example, instance #1 of the application will have its base address at 30000. The X.25 link

would be connected at that TCP port number. The first VC would be at TCP 30001, and so on.

When the X.25 link is to be on an incoming TCP session, the type would be set to rcv. The X.25

link would reside at the TCP port specified by the base parameter.

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When the X.25 link is to be on an outgoing TCP session, the type would be set to orig. The IP

address would be specified by the dest parameter, and the TCP port at that IP address would be

specified by the dport parameter.

The numvcc parameter is the number of X.25 virtual circuits to be supported. The default is 16.

The win parameter specifies the LAPB window size to be used for transmission. The Window

size is always 8 frames for receive. The default transmission window size is 2 per the ITU

specification X.25.

The t1 parameter specifies the value of the T1 timer. The timer defaults to the recommendation of

the ITU specification X.25. It is provided as an option for non-standard configurations.

The n2 parameter specifies the value of the N2 retry counter. The value defaults to the

recommendation of the ITU specification X.25. It is provided as an option for non-standard

configurations.

2.3.6 VIRTUAL CIRCUIT CONFIGURATION

Syntax: vc <vc#> [win=<#>] [svc=< pad|pass>] [type=<RCV|ORIG>]

[dest=<IP Address>] [dport=<TCP Port>]

The VC command is only visible when the application is logged in. The command is used to

configure a virtual circuit connection to a Virtual X.25 line.

The <VC#> parameter refers to the virtual circuit configured on the X.25 line. It has the range of 1

through the number of circuits configured.

When the X.25 virtual circuit is to be placed on an incoming TCP session, the type would be set

to rcv. The X.25 virtual circuit would reside at the TCP port specified by the base parameter

offset by its virtual circuit number.

When the X.25 virtual circuit is to be placed on an outgoing TCP session, the type would be set

to orig. The IP address would be specified by the dest parameter, and the TCP port at that IP

address would be specified by the dport parameter.

The win parameter refers to the packet layer window size to be used for transmission purposes.

It defaults to the value of 2 per the ITU Recommendation X.25.

The svc parameter allows the type of service to be performed on the virtual circuit. When the

value of PAD is selected, the virtual circuit is terminated in a X.3 PAD service. When the value of

PASS is selected, an X.25 pass-through service is selected.

2.3.7 CONFIGURING PAD PARAMETERS

Syntax: pad <vc #>[echo=<ON|OFF>] [fwd=< none|cr|all>] [idle=<#ticks>]

[inact=<# seconds>|OFF]

The PAD command is only visible when the application is logged in. The command is used to

configure the X.3 PAD parameters of a virtual circuit. These parameters have relevance only if

the service selected on the virtual circuit is

PAD.

The <VC #> parameter refers to the virtual circuit configured on the X.25 line. It has the range of

one through the number of circuits configured.

The echo option refers to reference #2 in the X.3 parameter list. When set to OFF, the IP-PAD

will not echo characters back to the IP endpoint. When set to the value of ON, all characters are

to be echoed back to the IP source.

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The fwd parameter specifies reference #3 in the X.3 parameter list. This is the forwarding

condition (outside the PAD timer) which will forward data towards the X.25 virtual circuit. A value

of NONE indicates that there are no character forwarding conditions. A value of CR indicates that

a carriage return will forward any accumulated data (including the carriage return). A value of

ALL indicates that all data is to be forwarded immediately. The ALL option has the effect of

generating single user character X.25 packets on this virtual circuit.

The idle parameter refers to reference #4 in the X.3 parameter list. This is the time forwarding

condition. When it expires, it will forward any data collected to the X.25 circuit. The timer is reset

to the specified value whenever a forwarding condition is reached. The value is based on ticks of

1/20th of a second each per the X.3 specification.

The break parameter refers to reference #7 in the X.3 parameter list. This is the action to be

taken when a break indication (a standard telnet encapsulated value) is received from the remote

IP endpoint. The value of NONE will ignore the break, and it is deleted from the data stream. The

value of INTR will generate an X.25 interrupt packet. The value of RESET will generate an X.25

virtual circuit reset. The value of BRKIND will generate an X.29 “indication of break” message on

the X.25 virtual circuit.

The crlf parameter refers to reference #13 in the X.3 parameter list. This is the action to be taken

when a CR is received in the data stream from the remote IP endpoint. A value of NONE

indicates that there is to be no LF (line feed) insertion. A value of RMT will insert an LF following

a CR whenever it is sent towards the remote IP endpoint. A value of VC will insert an LF following

a CR whenever it is sent towards the X.25 virtual circuit. A value of BOTH will insert an LF

following a CR in either direction.

The inact option refers to the PAD inactivity timer. If enabled, the TCP session on that X.25

virtual circuit is disconnected when the inactivity timer expires. The value defaults to OFF.

2.3.8 DISPLAY MEASUREMENTS

Syntax: dmeas [link|vc <#>]

The dmeas command is only visible when the application is logged in. The command is used to

display the current measurements on either the X.25 link or per virtual circuit.

The LINK parameter will display the measurement information for the X.25 link being supported

by this instance of the application.

The VC <#> option will display the measurement information for a particular X.25 virtual circuit on

the link. The virtual circuit number is in the range of one through the maximum number supported

by the application.

2.3.9 VERIFY CONFIGURATION

Syntax: vfy [link|vc <#>]

The vfy command is only visible when the application is logged in. The command is used to

display the configured options on the X.25 link, or a virtual circuit resident on the X.25 link.

The LINK parameter will display the configuration information for the X.25 link being supported by

this instance of the application.

The VC <#> parameter will display the configuration information for a particular X.25 virtual circuit

on the link. The virtual circuit number is in the range of 1 through the maximum number supported

by the application.

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