http://cio.cisco.com/warp/public/558/36.html (World Wide Web Directory, 06/1995)
LAN2LAN for ISDN
Introduction
Cisco Systems demonstrates its commitment to the European Integrated
Services Digital Network (ISDN) remote access market by adding two new ISDN
products to the LAN2LAN(tm) family, LAN2LAN Enterprise(tm) for ISDN and
LAN2LAN Remote Office(tm) for ISDN. These new products are based on proven
Cisco PC-software router technology and provide scalable multiprotocol
routing support and flexible wide-area connectivity for a variety of
applications. This routing functionality provides the capabilities for
custom solutions, scaled to customers' current needs, yet expandable to
their future needs.
LAN2LAN for ISDN is a PC-based software router featuring integrated ISDN
communications hardware integrated into your PC. This ISDN communications
hardware, the ISDN Network Interface Card (INIC), is available in Basic
Rate Interface (BRI) and four-port Basic Rate Interface (4-BRI)
configurations. LAN2LAN for ISDN supports IP and IPX routing and
bridging
over ISDN connections, with special software features to allow automatic
dial-on-demand routing (DDR), bandwidth on demand, maintenance of virtual
host-client connections, and data compression. LAN2LAN for ISDN can easily
be upgraded to support leased line, X.25, and Frame Relay WAN connections.
LAN2LAN for ISDN
Features at a Glance
- Enterprise and Remote Office versions for scalable solutions
- Dynamic data compression
- Scalable BRI and 4-BRI solutions
- Support for up to 24 B-channels
- Support for up to 24 synchronous links (12 with data compression)
- Concurrent support of ISDN, PPP, X.25, and Frame Relay WAN protocols
- Supports Euro-ISDN and native ISDN protocols in most European countries
- Dial-on-Demand (DDR)
- Bandwidth on demand (BOD)
- ISDN backup
- Calling Line Identification (CLI) and Challenge Handshake Authentication
Protocol (CHAP)
- Simple router configuration with menu-based interface
Benefits Summary
- Increased bandwidth with data compression
- Increased WAN availability with ISDN backup
- Reduced line cost with DDR
- Network secured from unauthorized remote sites
- Cost-effective, entry-level ISDN platform provided by LAN2LAN Remote
Office for ISDN
- Cost-effective routing capability that allows remote branch offices to
easily and inexpensively access enterprise-wide information
- Scalable solution -- users can easily upgrade to the required number
of ISDN and/or synchronous ports to create a customized router
Dial-on-Demand Routing
When ISDN is used as the primary communication technology, LAN2LAN performs
DDR. When using DDR, users automatically trigger the ISDN connections when
there is data to send. During periods of inactivity, the ISDN connection is
disconnected and no charges are incurred. LAN2LAN for ISDN achieves DDR by
performing intelligent spoofing and filtering to ensure that periodic
maintenance packets, such as network broadcasts, do not cause the ISDN line
to become active.
Figure 1: Dial-on-Demand Routing
Bandwidth on Demand
LAN2LAN for ISDN supports bandwidth on demand. With this feature, multiple
simultaneous B-channel calls are placed to a single destination when higher
bandwidth is required. As traffic levels increase beyond a preset usage
level, additional calls are initiated. As traffic levels decline,
underutilized calls are terminated. The result: users specify acceptable
network response times, and LAN2LAN automatically optimizes bandwidth
usage.
As a result, users get acceptable network response times and only pay for
the bandwidth required.
Figure 2: Bandwidth on Demand
ISDN Backup
ISDN is often used as a backup technology to leased line services.
Organizations that require a WAN service for long periods of the work day
will normally choose a leased line as a primary link. ISDN circuit-switched
services provide a cost-effective backup method if the primary link fails.
When the leased line service is functional, LAN2LAN can be configured to
use the bandwidth on demand feature with ISDN to provide additional
bandwidth.
Figure 3: ISDN Backup
ISDN Security Features
LAN2LAN for ISDN provides Calling Line Identification and the
Point-to-Point Protocol (PPP) Challenge Handshake Authentication Protocol
(CHAP) to ensure a secure internetwork. Using Calling Line Identification,
LAN2LAN checks the ISDN number of the calling device and verifies whether
it is authorized. If the number is not authorized, the call is rejected and
no charges are incurred by the calling party. This security feature can be
enhanced with CHAP where encrypted passwords are exchanged before enabling
data transfer.
LAN2LAN for ISDN Product Information
Each LAN2LAN router includes a WAN adapter. LAN2LAN Remote Office and
LAN2LAN Remote Office for ISDN can only use one WAN adapter.
LAN2LAN Remote Office for ISDN and LAN2LAN Enterprise for ISDN include an
ISDN Network Interface Card (INIC) adapter.
LAN2LAN Remote Office and LAN2LAN Enterprise include a Wide-Area Network
Interface Coprocessor (WNIC(tm)) adapter.
WAN adapters can be added to LAN2LAN Enterprise products to provide
additional functionality. The adapters can be added to LAN2LAN Remote
Office products only after upgrading the software to LAN2LAN Enterprise.
The WNIC supports PPP, X.25, and Frame Relay WAN protocols. The INIC is an
integrated ISDN adapter; therefore, it only supports ISDN.
WAN Adapter Support
-----------------------------------------------------------------------------
MODEL INCLUDED WAN ADAPTER ADD-ON WAN ADAPTERS
=============================================================================
LAN2LAN Remote Office WNIC *
LAN2LAN Remote Office INIC (BRI) *
for ISDN
LAN2LAN Enterprise WNIC INIC (BRI or 4-BRI) or WNIC
LAN2LAN Enterprise INIC (BRI or 4-BRI) INIC (BRI or 4-BRI) or WNIC
for ISDN
-----------------------------------------------------------------------------
* Must be upgraded to LAN2LAN Enterprise to add WAN adapters
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WAN Protocol Support
The WNIC supports the PPP, X.25, and Frame Relay WAN protocols. The INIC is
an integrated ISDN adapter, therefore, it only supports ISDN.
-----------------------------------------------------------------------------
MODEL INCLUDED WAN PROTOCOLS ADDITIONAL WAN PROTOCOLS
=============================================================================
LAN2LAN Remote Office PPP, X.25, Frame Relay *
LAN2LAN Remote Office ISDN *
for ISDN
LAN2LAN Enterprise PPP, X.25, Frame Relay ISDN
LAN2LAN Enterprise ISDN PPP, X.25, Frame Relay
for ISDN
-----------------------------------------------------------------------------
* Must be upgraded to LAN2LAN Enterprise to run additional WAN protocols
-----------------------------------------------------------------------------
Both the BRI and the 4-BRI INIC are ISA bus-based and can be used in ISA or
EISA PCs. The INIC BRI uses one PC slot; the INIC 4-BRI requires two slots.
INIC Adapters
------------------------------------------------------------------------
ISDN ADAPTER NUMBER OF B CHANNELS NUMBER OF PC SLOTS REQUIRED
========================================================================
INIC BRI 2 1
INIC 4-BRI 8 2
------------------------------------------------------------------------
Product Upgrade Information
Existing LAN2LAN Remote Office and LAN2LAN Enterprise routers can be
upgraded to support ISDN. LAN2LAN Remote Office for ISDN routers can be
upgraded to LAN2LAN Enterprise for ISDN routers.
LAN2LAN for ISDN Availability
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PRODUCT WAN ADAPTER AVAILABLE*
=========================================================================
LAN2LAN Remote Office for ISDN BRI Now*
LAN2LAN Enterprise for ISDN BRI Now
LAN2LAN Enterprise for ISDN 4-BRI 3/95
INIC Add-on Adapter BRI Now
INIC Add-on Adapter 4-BRI 3/95
LAN2LAN Enterprise Software Upgrade N/A Now
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* See homologation for availability in specific countries.
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Posted: Mar 21 08:35:13 1995
http://cio.cisco.com/warp/public/558/36.html (World Wide Web Directory, 06/1995)