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Software

Product

Description

PRODUCT NAME: DECrouter 250, Version 1.1 SPD 32.15.02

DESCRIPTION

The DECrouter 250 software is a communications prod-

uct that provides an asynchronous/synchronous routing

service for the Local Area Network (LAN). This allows

DECnet nodes running DDCMP to communicate with

nodes on an Ethernet/802.3 LAN and allows DECnet

DDCMP nodes on an Ethernet/802.3 LAN to commu-

nicate with nodes outside the LAN within a Wide Area

Network (WAN).

Overview

The DECrouter 250 software provides access to and

from Phase IV/IV+ DECnet nodes on a LAN and

Phase III or Phase IV/IV+ DECnet nodes over asyn-

chronous/synchronous lines. These nodes can be lo-

cated either locally via dedicated wiring, or remotely via

modem connections. Note that LAN refers to any Lo-

cal Area Network that conforms to IEEE 802.3, or ISO

8802/3 standards.

The DECrouter 250 software runs on the DECrouter 250

(DSRVR) and the DEC WANserver 150 (DSRVJ) hard-

ware units. These contain an Ethernet interface port

(IEEE 802.3 compatible). The DECrouter 250 hard-

ware has eight asynchronous/synchronous serial com-

munications ports, and the DEC WANserver 150 has

two asynchronous/synchronous serial communications

ports.

The DECrouter 250 software performs adaptive rout-

ing utilizing all of the asynchronous/synchronous lines

and the Ethernet/802.3 ports of the hardware. In the

case where communications to an end node might pass

through multiple routers, the DECrouter 250 software

has the capability of choosing the least cost path or re-

routing in case of a line failure.

The DECrouter 250 software supports intra-area (Level

1) and inter-area (Level 2) routing of messages between

DECnet nodes. These nodes can be Phase III/IV/IV+

routing nodes or end nodes. Use of this software off-

loads routing-related communications from hosts that

would otherwise serve as routing nodes on the Local

Area Network-based DECnet LAN.

A major security feature of the DECrouter 250 software

is support for modem dial-back. This feature allows net-

work managers tighter control over access to their DEC-

net networks.

The DECrouter 250 software must be downline loaded

onto the DECrouter 250 or DEC WANserver 150 hard-

ware units over the Ethernet/802.3 port or the serial

communications ports.

Routing and DECnet Phase IV Areas

The DECrouter 250 software implements Phase IV/IV+

DECnet DDCMP routing and network management.

Phase IV/IV+ DECnet networks are hierarchical net-

works that can be segmented into up to 63 areas, each

containing up to 1023 nodes.

Routers can be one of two types; Level 1 or Level 2.

Level 1 Routers route directly toward nodes within their

own area, and route toward a Level 2 Router when the

destination node is in a different area. Level 2 Routers

act as Level 1 Routers within their own area, but in ad-

dition, route to other areas.

The DECrouter 250 software supports both the intra-

area routing (Level 1) and inter-area routing (Level 2) for

Phase IV/IV+ nodes on a Local Area Network, or Phase

III/IV/IV+ remote nodes connected to one of the asyn-

chronous/synchronous serial communications ports.

Line Support

The DECrouter 250 software uses the DECrouter 250

or DEC WANserver 150 hardware serial communica-

tions ports to connect nodes running asynchronous or

synchronous DDCMP DECnet, and the Ethernet/802.3

ports to connect to the Ethernet/802.3 LAN. The

asynchronous/synchronous ports operate in full-duplex,

point-to-point mode and support the ability to connect

manually dialed or auto-answered modems. The asyn-

chronous/synchronous ports have been designed to be

compatible with modems conforming to Bell standards

and CCITT recommendations. Note that multipoint lines

or connections to DMC11s are not supported.

Refer to the System Support Addendum (SSA 32.15.02-

x) for further information on supported modems.

April 1991

AE-PBAGC-TK

1 2 3 4 5 6 7 8

Inhaltsverzeichnis

Seite 1 - Description

SoftwareProductDescriptionPRODUCT NAME: DECrouter 250, Version 1.1 SPD 32.15.02DESCRIPTIONThe DECrouter 250 software is a communications prod-uct that

Seite 2 - Performance

DECrouter 250, Version 1.1 SPD 32.15.02The DECrouter 250 (DSRVR) hardware has two highspeed serial ports and six low speed serial ports. TheDEC WANser

Seite 3

DECrouter 250, Version 1.1 SPD 32.15.02• On DECrouter 250 hardware: 2x64 Kbps, or 1x64Kbps and 4x9.6 Kbps, or 8x19.2 Kbps• On DEC WANserver 150 hardwa

Seite 4

DECrouter 250, Version 1.1 SPD 32.15.02® Hayes is a registered trademark of Hayes MicrocomputerProducts, Inc.® IBM is a registered trademark of Intern

Seite 5 - Addendum

SystemSupportAddendumPRODUCT NAME: DECrouter 250, Version 1.1 SSA 32.15.02-AHARDWARE REQUIREMENTSProcessors SupportedVAX: VAXft 3000-310VAX 4000 Model

Seite 6 - Processors Not Supported:

DECrouter 250, Version 1.1 SSA 32.15.02-ARISC-Based Processors:DECstation: DECstation 2100, DECstation 3100,DECstation 3100s,DECstation 5000 Model 200

Seite 7

DECrouter 250, Version 1.1 SSA 32.15.02-AWithin the UK, an additional adapter cable is needed toallow connection to the British Telecom Kilostream asl

Seite 8

DECrouter 250, Version 1.1 SSA 32.15.02-AFor more information on VMS classes and tailoring, re-fer to the VMS Operating System Software Product De-scr

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