OfficeConnect™ Remote
840 SDSL Router User’s
Guide
®
Release 1.2.0
http://www.3com.com/
Part No. 10031396 Rev. AA
May 2000
Introduction
How to Use This Guide
Conventions
2
Document Notation
Safety Information
4
Additional Safety Information
5
What Is Default Bridge Mode? 1 - 9
What is Unconfigured Mode? 1 - 9
Getting Started Quickly 1 - 9
OfficeConnect Remote 840 Panel Features 1 - 10
Front Panel 1 - 10
OfficeConnect Remote 840 Manager Menus 1 - 15
Document Notation 1 - 16
Online Help 1 - 17
Modifying the Date and Time
Updating OfficeConnect Remote 840 Software 2 - 4
Controlling SNMP Access
Controlling TFTP Access
2 - 6
Assigning SNMP Trap Managers
2 - 7
Assigning Syslog Managers
REMOTE SITE MANAGEMENT
Introduction 3 - 1
Remote Site Overview
3 - 1
Managing a Remote Site Profile 3 - 2
Frame Relay 3 - 5
Configuring ATM Information
ATM Modify Screen 3 - 6
Configuring Protocol Parameters 3 - 8
Configuring IP RIP on a Remote Site
Using IP Address Validation 4 - 12
MAC-Encapsulated Routing 4 - 13
Monitoring 4 - 14
IP Testing (PING) 4 - 14
Option 1: OfficeConnect Remote 840 Manager Ping to ISP or Remote Site Network 4 - 14
Ping Responses 4 - 15
Option 2: DOS Ping to ISP or Remote Site Network 4 - 16
Option 3: Internet Browser (Internet Access Only) 4 - 17
Monitoring Bridging 5 - 11
Viewing Bridge Forwarding Table 5 - 11
Viewing Bridge Counters 5 - 11
NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840
Introduction 6 - 1
Selecting Address Translation 6 - 1
Configuring Static PAT Port Entries 6 - 3
Configuring NAT 6 - 4
Configuring the DHCP Mode 7 -2
Configuring the DHCP Relay 7 -4
Monitoring DHCP 7 -4
Introduction 8 - 1
Configuring DNS 8 - 2
Configuring Remote DNS Servers 8 - 2
Introduction 9 - 1
Overview 9 - 1
Configuring IPX for the LAN 9 - 2
Adding a Local IPX Network
9 - 2
Modifying or Deleting an IPX Network 9 - 3
Local Site (LAN) RIP and SAP 9 - 10
IPX Routing Configuration to Support MAC-Encapsulated Routing 9 - 12
Monitoring IPX 9 - 12
Obtaining Updated OfficeConnect Remote 840 Software 10 - 1
Installing Operational Software to the OfficeConnect Remote 840 Unit 10 - 2
Installing Software via OfficeConnect Remote 840 Manager 10 - 2
Overview 11 - 1
Throughput Performance 11 - 1
Ethernet Interface 11 - 3
Interface Status 11 - 3
Ethernet Counters 11 - 4
Data Filters
12 - 9
Step-by-Step Guide to Creating Filters Using the OfficeConnect Remote 840 Manager 12 - 12
Modifying an Existing Filter Using the OfficeConnect Remote 840 Manager 12 - 13
WAN Connection Problems
13 - 6
General Network Connection Problems
IP Network Connection Problems 13 - 9
13 - 7
IPX Network Connection Problems 13 - 12
How Bridges Learn
Network Organization, Structure, and Physical Layout A -6
Routing IP A -7
Open Systems Interconnection Network Layer Model A -8
IP Routing
Subnetting
IP Planning B - 5
Assigning IP Addresses and Subnetting B - 5
Single IP Address B - 6
Range of IP Addresses B - 6
IP Numbered and Unnumbered Links B - 7
Port Address Translation (PAT)
Dynamic PAT C -5
Static PAT C -5
C -4
USING THE CLI GUIDE
Overview D -1
Step 1: Configuring Remote Site General Information E - 7
Step 2: Configuring the Remote Site ATM Parameters E - 9
Step 3: Configuring the Remote Site IP Network Information E - 10
Step 4: Configuring the Remote Site IPX Network Information E - 12
Step 5: Configuring a Local IPX Network E - 13
Using the Configuration Audit E - 13
Saving the Configuration E - 14
Online Technical Services F - 1
World Wide Web Site F - 1
Support from 3Com F - 2
Returning Products for Repair F - 2
3COM CORPORATION LIMITED WARRANTY
FCC CLASS B STATEMENT
FCC DECLARATION OF CONFORMITY
ABOUT THIS GUIDE
Introduction
This guide describes the features and advanced configuration of the
OfficeConnectRemote 840 SDSL Router. The guide is intended for both
first-time and experienced computer network users who are using the
OfficeConnectRemote 840.
For information on the initial configuration of the unit, see the
OfficeConnect Remote 840 SDSL Router Installation Guide (included in
the box when your purchased your Router). That guide contains steps to
get the user started accessing the Internet or telecommuting to a remote
office.
This OfficeConnectRemote 840 SDSL Router User's Guide is intended to
be used for advanced configuration, presenting more detailed
information on the unit.
First-time users may want to read the tutorials in this Guide to help you
learn more about the networking technologies used by the
OfficeConnectRemote 840 SDSL Router.
The appendixes describe how to set up your router without using the
Setup Wizard.
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ABOUT THIS GUIDE
How to Use This
Guide
This table shows where to find specific information in this guide.
If you are looking for:
Turn to:
OfficeConnect Remote 840 Product Overview and
Configuration
Chapters 1, 2
Configuration of your Router (Remote Sites, IP Routing,
Bridging, NAT, DHCP, DNS, IPX Routing)
Chapter 3 – 9
Upgrading Software
Monitoring Capabilities
Configuring Filters
Troubleshooting
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Information on the difference between Bridging and RoutingAppendix A
Information about IP Addressing
Information on Address Translation
Information on using the CLI Guide
Information on Configuration
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Information on Technical Support
These and other user guides and release notes are available in Adobe
World Wide Web site:
http://www.3com.com/ocr840
Conventions
Table 1 and Table 2 list conventions that are used throughout this guide.
Table 1 Notice Icons
Icon
Notice Type
Description
Information note Information that describes important features or
instructions
Caution
Information that alerts you to potential loss of data or
potential damage to an application, system, or device
Warning
Information that alerts you to potential personal injury
Document Notation
3
Table 2 Text Convention
Convention Description
Screen displays This typeface represents information as it appears on the
screen.
Syntax
The word “syntax” means that you must evaluate the syntax
provided and then supply the appropriate values for the
placeholders that appear in angle brackets. Example:
To add a login user, use the following syntax:
Add user <name> password <password>
In this example, you must supply a user name for <name>
and a password for <password>.
Commands
The word “command” means that you must enter the
command exactly as shown and then press Return or Enter.
Commands appear in bold. Example:
To view the current login users, use the command:
list users
The words “enter”
and “type”
When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press
Return or Enter when an instruction simply says “type.”
Keyboard key names If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+). Example:
Press Ctrl+Alt+Del
Words in italics
Italics are used to:
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Emphasize a point.
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Denote a new term at the place where it is defined in the
text.
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Identify menu names, menu commands, and software
button names. Examples:
From the Help menu, select Contents.
Click OK.
Document Notation References to specific OfficeConnect Remote 840 Manager pages in this
document will use a specific notation to describe the location of a page
relative to the OfficeConnect Remote 840 Manager home page. The
notation uses the' >' character to indicate that a sub-menu on a page
must be accessed.
For example, to monitor the IP ARP Table you would (starting from the
home page) access the Monitor menu. From the Monitor menu you
would access the Networks sub-menu. From the Networks sub-menu you
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ABOUT THIS GUIDE
would access the IP sub-menu. Finally, from the IP sub-menu, you would
access the ARP Table page. This is specified as Monitor > Networks > IP
> ARP Table.
When accessing a page that requires data entry, press the Help icon
displayed in the Main area to obtain information about the each data
field on the page.
Safety Information
When using the unit, observe the following safety information:
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Retain this user guide for later use and pass it on to subsequent
owners/managers of the unit.
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The power adapter supplied with the unit is fitted with a molded plug
for connection to a standard electrical mains system supply socket. If
this plug is not suitable for connection to your mains supply, contact
your reseller for advice. Do not attempt to connect to the mains
supply using an inappropriate mains adapter.
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Protect the unit from sudden, transient increases and decreases in
electrical power by fitting an in-line surge suppressor or
uninterruptible power supply.
Products manufactured by 3Com are safe and without risk provided
they are installed, used, and maintained in good working order and in
accordance with their instructions and recommendations.
Should any of the following conditions occur, isolate the electricity
supply and refer to your 3Com reseller.
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If the case or cover is not correctly fitted.
If the case is damaged.
If the unit begins to make an odd noise, smell or smoke.
If the unit shows signs of a distinct change in performance.
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Never install telephone wires during a thunder storm, or install
telephone connection sockets in wet locations (unless the socket is
specifically designed for wet locations).
Do not touch uninstalled telephone wires or terminals unless the
telephone line has been disconnected at the network interface.
Always exercise caution when installing or modifying telephone lines.
Do not use a telephone that is connected to the unit to report a gas
leak in the vicinity of the leak.
Year 2000 Compliance
5
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Do not use a telephone that is connected to the unit (other than a
cordless type) during an electrical storm. There may be a remote risk
of electric shock from lightning.
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Do not spill food or liquids on the unit. If the unit gets wet, isolate the
electrical supply and contact your 3Com reseller.
Do not push any objects into the openings of the unit. Doing so can
cause fire or electric shock by shorting out internal components.
Ensure nothing rests on the unit's system cables and that the cables
are not located where they can be stepped on and cause damage to
the unit.
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Keep the unit away from radiators and heat sources. Allow 25mm (1
inch) around the unit or stack to provide adequate air circulation.
Install the unit in a clean area that is free from dust or extreme
temperatures.
The unit has been designed to be a free standing unit. Do not place
anything else on top of the unit's case.
Allow a clearance gap of at least a 150 mm from the rear panel of the
unit, to allow for cable access.
This unit contains a lithium battery which is attached to a microchip
on the printed circuit board. The defective battery must be disposed of
safely in accordance with the manufacturers instructions.
Cette unité contient une pile au lithium attachée à une puce sur la
carte à circuit imprimé. Se débarrasser de la pile défectueuse en toute
sécurité conformément aux instructions du fabricant.
Additional Safety See the printed installation guide for additional important safety
Information information.
Year 2000
Compliance
For information on Year 2000 compliance and 3Com products, visit the
3Com Year 2000 web page:
http://www.3Com.com/products/yr2000.html
6
ABOUT THIS GUIDE
OVERVIEW
1
Introduction
This chapter provides an overview of the OfficeConnect Remote 840. It
contains the following sections:
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“What is an SDSL Modem?”
“What is ATM?”
“What is Frame Relay?”
“What is a BRouter?”
“What is a Remote Site?”
“What is RFC 1483”
“What is RFC 1490?”
“What is PPP?”
“What is DHCP?”
“What is DNS?”
“What is DHCP Smart Mode?”
“What Is Default Bridge Mode?”
“Getting Started Quickly”
“How to Manage the OfficeConnect Remote 840”
“Starting the OfficeConnect Remote 840 Manager”
“Using the OfficeConnect Remote 840 Manager”
“Online Help”
1-2
CHAPTER 1: OVERVIEW
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“Where to Find More Configuration Information”
What Is the
OfficeConnect
Remote 840?
The OfficeConnect Remote 840 is a stand-alone BRouter with data
interfaces to a Local Area Network (LAN) and a Wide Area Network
(WAN). The Symmetric Digital Subscriber Line (SDSL) port composes the
WAN interface, which can support Point-to-Point protocol (PPP), RFC
1483, or RFC 1490 connections. The LAN port is a twisted-pair Ethernet
10Base-T interface. Additionally, the OfficeConnect Remote 840 has a
standard serial interface console port.
The OfficeConnect Remote 840 allows one or more networked
workstations to connect to other computers on a remote LAN. Once
connected, local users (a local branch office) can communicate with
remote computers (the main office) as if they were connected locally (see
the figure below). The OfficeConnect Remote 840 moves data back and
forth quickly, and accesses any program or file you would ordinarily use
on the network.
Local LAN
OfficeConnect Remote
840 SDSL Router
Edge
Router
Internet
HTML
Management
ATM
Frame Relay
Edge
Router
Remote
Office
Figure 1–1 Connection to Remote Networks
The OfficeConnect Remote 840 can provide high-speed access to the
Internet.
The OfficeConnect Remote 840 provides static and dynamic routing of
the Internet Protocol (IP) and Internetwork Packet Exchange (IPX)
What is an SDSL Modem? 1-3
protocols as well as bridging, with support for learning bridge and
802.1d spanning tree functionality to eliminate loops. Other important
features include: Routing Information Protocol (RIP), Simple Network
Management Protocol (SNMP), address translation, telnet, and packet
filtering. The web browser-based OfficeConnect Remote 840 Manager
and the IP Wizard provide a user-friendly configuration interface.
To simplify the installation process, the OfficeConnect Remote 840 can be
initialized with pre-configured parameters using DIP switches located on
the back of the unit. There are three operational modes: DHCP Smart
Mode, Default Bridge Mode, and Unconfigured Mode.
What is an SDSL
Modem?
An SDSL modem is a device that transmits and receives data through
regular telephone lines at speeds that far exceed traditional analog
modem technology.
It allows your workstation to connect to a remote site using a network
protocol such as IP or IPX. The OfficeConnect Remote 840 contains one
SDSL modem port which is the WAN interface.
What is ATM?
Asynchronous Transfer Mode (ATM) is a modern networking technology
that provides support for a wide variety of services and applications. The
OfficeConnect Remote 840 provides support for ATM over SDSL.
ATM is based on the transfer of fixed-length cells containing a header
and an information field. The header is used to route the cells through
the ATM network backbone.
ATM defines connections by two main parameters, which are explained
later in this Guide:
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Virtual Path Identifier (VPI)
Virtual Channel Identifier (VCI).
What is Frame
Relay?
Frame Relay is a framed-based technology that runs over HDLC (High
Level Data Link Control). Virtual Circuits are defined which connect the
OfficeConnect Remote 840 to up to 16 remote sites within a Frame Relay
Network. Each Virtual Circuit is identified by a Data Link Connection
Identifier (DLCI), which is included in the frame header.
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CHAPTER 1: OVERVIEW
What is a BRouter?
A BRouter is an interface between two networks, functioning as a router
and/or a bridge. A router finds the best route between networks and
provides network management capabilities. The OfficeConnect Remote
840 is a protocol independent router that does not rely on the
workstations on a LAN for routing information, such as the destination
location and best route.
Routing vs. Bridging Routers forward packets based on network-level addresses. Bridges
forward packets based on hardware-level, or media access control (MAC)
addresses. In other words, when a router receives a packet from one port,
it looks at the destination network level address (for example, the IP
address) to determine which port to forward the packet to. When a
bridge receives a packet from one port, it looks at the destination MAC
address to determine which port to forward the packet to.
In each case, the unit maintains either a forwarding table (bridges) or a
routing table (routers) that contains information about which port to use
to reach the destination address. These tables are for the most part
maintained automatically by the unit so the administrator does not have
to add or delete entries as the network topology changes.
An example illustrating the difference between bridges and routers would
be the case where both a bridge and a router have tables with 256
entries. Because the bridge forwards based on MAC address, it can know
about the location of 256 MAC addresses (physical machines such as
workstations, servers, etc.). The router can know about the location of
256 networks, where each network can contain many physical machines.
Bridges make forwarding decisions based on destination addresses, while
routers makes forwarding decisions based on networks to which
capable of handling more traffic.
The OfficeConnect Remote 840 provides a Bridge Firewall function which
allows flexible configuration of simultaneous bridging and routing. For
more information on the Bridge Firewall, see Appendix A, “Bridging and
Routing”.
MAC-Encapsulated MAC-Encapsulated Routing enables the OfficeConnect Remote 840 to
Routing function as a router but to work in a bridged environment. When
enabled, the network level addresses are used for forwarding, but the
What is a Remote Site? 1-5
MAC layer addresses are pre-pended in the ethernet header over the
Wide Area Connections. Address Resolution procedures (ARP), are used
to dynamically learn the MAC address of the remote router.
What is a Remote
Site?
The OfficeConnect Remote 840 can be configured to route IP or IPX,
and/or bridge other protocols between workstations on the Local Area
Network (LAN) and up to 16 remote locations over an ATM or Frame
Relay Wide Area Network (WAN). This is illustrated in the diagram below,
showing the local LAN simultaneously connected to a remote office and
the Internet.
Local LAN
OfficeConnect Remote
840 SDSL Router
Edge
Router
Internet
HTML
Management
ATM
Frame Relay
Edge
Router
Remote
Office
Figure 1–2 Connection to a Remote Internet Network
Data is transmitted to and from remote sites through ATM or Frame
Relay. With ATM, each VC has a configured Quality of Service (QOS) and
is identified by a Virtual Path Identifier (VPI) and a Virtual Channel
Identifier (VCI). With Frame Relay, each Virtual Circuit is identified by a
DLCI. Obtain these parameters from your Service Provider.
The data is framed in either PPP, RFC 1483 or RFC 1490 encapsulation,
which also is specified by your Service Provider.
The IP, IPX, and bridge protocols transmit over the ATM VCs. When a
remote site is configured to route IP, there will be a corresponding remote
network IP subnet address and (optionally) a local WAN interface address
1-6
CHAPTER 1: OVERVIEW
within the same subnet. When the local side of the WAN interface has an
assigned address, it is referred to as being "numbered." Otherwise, it is
referred to as "unnumbered."
For a more in-depth description of “numbered” versus “unnumbered”
interfaces, see Appendix B, “IP Addressing”.
When PPP is used, both the local and remote WAN addresses can by
dynamically learned. Otherwise, they must be specified. The diagram
below shows a OfficeConnect Remote 840 with 3 VCs and the
corresponding IP addresses.
When PPP is used, both the local and remote WAN addresses can by
dynamically learned. Otherwise, they must be specified. The diagram
below shows an OfficeConnect Remote 840 with 3 VCs and the
corresponding IP addresses.
Figure 1–3 Connection with Three Virtual Circuits (VCs)
What is RFC 1483
RFC 1483 is a protocol standard that describes two encapsulations
methods for carrying network interconnect (Bridging and Routing) traffic
over ATM AAL5.
RFC 1483 is a single-link interface between two packet-switching devices,
such as a bridge or router. An RFC 1483 link may be created between the
OfficeConnect Remote 840 and a remote router after they establish a
What is RFC 1490? 1-7
connection. RFC 1483 is a conduit for multiple protocols such as IP and
IPX, which are encapsulated and passed across the communications
datalink.
The OfficeConnect Remote 840 supports RFC 1483 and can establish a
RFC 1483 connection to other devices supporting RFC 1483.
Benefits of Using RFC RFC 1483 offers interoperability of multi-vendor equipment and
1483 identification and aggregation of multiple protocol packets into one data
stream.
What is RFC 1490?
It is a protocol standard that describes an encapsulation method for
carrying network interconnect traffic over a Frame Relay backbone. It
covers aspects of both Bridging and Routing.
The OfficeConnect Remote 840 supports RFC 1490 and can establish a
RFC 1490 connection to other devices supporting RFC 1490.
What is PPP?
The Point-to-Point Protocol (PPP) is a WAN protocol. It is a single or
multi-link interface between two packet switching devices, such as a
bridge or router. A PPP link may be created between the OfficeConnect
Remote 840 and a remote router after they connect. PPP is an efficient
conduit for multiple protocols such as IP and IPX, which are encapsulated
across the communications datalink.
PPP provides built-in negotiation for addresses and connection
parameters, and it can route multiple protocols over a single link.
The OfficeConnect Remote 840 supports PPP and can establish a PPP
connection to other devices supporting PPP.
Benefits of Using PPP PPP offers interoperability of multi-vendor equipment, and support for
dynamic configuration between the connecting devices.
What is DHCP?
Dynamic Host Configuration Protocol (DHCP) is designed to provide a
centralized approach to configuring IP addresses and parameters.
When a workstation is configured for automatic assignment of IP
addresses, it broadcasts a request on the LAN. The DHCP Server responds
1-8
CHAPTER 1: OVERVIEW
with an IP address for the workstation and the IP addresses of the default
router and Domain Name Server.
The OfficeConnect Remote 840 can be configured to be a DHCP Server,
with a pool of up to 40 IP addresses.
What is DNS?
A Domain Name Server (DNS) provides an IP address to a host computer
for a given domain name. A DNS Proxy receives requests and attempts to
find an entry in its local tables, and if one is not found, forwards the
request to a remote DNS Server. The remote DNS Server can be learned
dynamically through PPP or can be statically assigned.
The OfficeConnect Remote 840 can be configured as a DNS proxy. A
static local host entry of ocrdsl-3com.com is configured for the
OfficeConnect Remote 840 by default. Therefore, the OfficeConnect
Remote 840 can be easily accessed with a web browser, by typing in
ocrdsl-3com.com in the location or address field in the browser.
In unconfigured mode, ocrdsl-3com.com is not configured by default. In
this mode, you will have to configure a static host entry.
What is Address
Translation?
Address Translation allows private network addresses to be mapped into
public addresses. The OfficeConnect Remote 840 provides two methods
for mapping private, non-registered LAN IP addresses to the public
Internet address(es) used for a wide-area connection. The two methods
are:
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Network Address Translation (NAT). NAT simply substitutes public IP
addresses for private IP addresses.
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Port Address Translation (PAT). PAT allows sessions from multiple
private IP addresses to use a single public IP address.
NAT and PAT can be configured for each remote site.
What is DHCP
Smart Mode?
To simplify the installation process, the OfficeConnect Remote 840 can be
initialized with a set of pre-configured parameters. This operational mode
is referred to as DHCP Smart Mode. In DHCP Smart Mode, the unit will
automatically be assigned an IP address and will provide a pool of IP
addresses to be assigned to each workstation attached to the LAN. When
What Is Default Bridge Mode? 1-9
you choose this boot option, you will set up your workstation(s) for
automatic IP address assignment.
What Is Default
Bridge Mode?
The second operational mode is Default Bridge Mode. This mode
preconfigures the unit to bridge all packets. The unit can be automatically
set up so that you will not be required to fill out any forms, use Setup
Wizard, or install any software from the CD unless you want to change
the configuration.
What is Unconfigured Unconfigured Mode allows you to set all configuration parameters
Mode? yourself. You can configure it using Command Line Interface (CLI) (see
the OfficeConnect Remote 840 CLI User’s Guide), or the Web-based
OfficeConnect Remote 840 Manager.
Getting Started
Quickly
The features described above can be utilized to make configuring the
OfficeConnect Remote 840 very easy.
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Use DHCP Smart Mode to preconfigure a LAN IP address, the DHCP
pool of addresses, and the DNS information for the LAN workstations.
Use Default Bridge Mode to have the unit automatically bridge all
packets. No software installation is required.
Use PPP to allow the OfficeConnect Remote 840 to automatically
learn the WAN IP addresses and DNS information.
Use PAT to allow the workstations on the LAN to share a single IP
address when accessing the Internet or a remote office.
Use these features together and all you will need to do is enter
authentication and ATM information for your remote site IP connection.
Or:
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Use Default Bridge Mode to have the unit automatically bridge all
packets. No software installation or configuration is required.
1-10
CHAPTER 1: OVERVIEW
OfficeConnect
Remote 840 Panel
Features
All LED and status information can be found on the front panel of the
unit, while the power jack and ports are located on the back of the unit.
Front Panel Below is a representation of the front panel of your unit:
Figure 1–4 OfficeConnect Remote 840 Front Panel
Table 1–1 LED definitions
LED
Status
Meaning
Alert
Power
FLASHING RED
STEADY GREEN
When software is initializing
When power is applied to the unit
No signal detected
SDSL Link Status OFF
FLASHING ORANGE
The unit is attempting to acquire
synchronization with the CO equipment.
STEADY GREEN
FLASHING GREEN
STEADY GREEN
Link is up.
When data is being sent over the link.
LAN Status (4)
When a client is connected to the
corresponding port on the hub.
A table of LED operation is provided in Chapter 3 of the OfficeConnect
Remote 840 SDSL Router Installation Guide in the section “Installing
The OfficeConnect Remote 840.”
OfficeConnect Remote 840 Panel Features 1-11
Back Panel Below is a representation of the back panel of your SDSL router:
Figure 1–5 OfficeConnect Remote 840 Back Panel
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Power Inlet — The power port attaches to an external, 15-volt DC
power supply included with the OfficeConnect Remote 840 package.
The other end of the power supply cable connects to a standard
electrical socket.
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Console Port — The DB-9 terminal port connects the OfficeConnect
Remote 840 with your console. A straight-through serial cable is
supplied to make the connection.
Reset Button — To reset the OfficeConnect Remote 840 to factory
defaults, press this button while rebooting (unplugging and
replugging into an electrical outlet) the unit. You can reset the unit in
Unconfigured Mode, DHCP Smart Mode, or Default Bridge Mode.
(See the Installation Guide for more information on the different
modes.)
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MDI/X Switch — Swaps the transmit (Tx) and receive (Rx) signal pairs
on Ethernet port 1. When MDI/X is "out" (not depressed), Port 1 is
pinned the same as the remaining 3 ports. In this mode, a PC's
Ethernet port or the cascade port on another hub can be connected to
any of the four ports on the unit. When MDI/X is pressed "in", then
Port 1 on the unit becomes a cascade hub port, for connection to a
non-cascade port on another hub. The MDI/X button must be "out"
to use Port 1 for connection to a PC.
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Ethernet (LAN) Ports (4) — The shielded, 8-pin, RJ-45 Ethernet
(10Base-T) ports connect the OfficeConnect Remote 840 with the
LAN. A straight-through cable is supplied in the package to make this
connection. Switches on the back of the unit provide crossover to
allow a direct connection to a single workstation.
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SDSL Modem Port — The 4-pin, RJ-11 line port connects your
OfficeConnect Remote 840 to the telephone company wall jack. An
RJ-11 modem cable is provided.
DIP (Dual Inline Package) Switches (4) — Switches 1 through 4 can
be turned on and off in certain combinations for different
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CHAPTER 1: OVERVIEW
configurations. See the table below for information about which
switches to set for which configurations.
Table 1–2 DIP Switch Modes
DIP Switch
1
2
3
4
Mode
off off off on Default Bridge Mode, Frame Relay, DLCI = 528, data
encapsulated over RFC 1483.
off off on off Default Bridge Mode, Frame Relay, DLCI = 16, data
encapsulated over RFC 1490.
off on off off DHCP Smart Mode
on off off on Default Bridge Mode, ATM, One VC define as a bridge,
VPI/VCI = 0/38
off off off off Unconfigured Mode
All other configurations: Unconfigured Mode
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DHCP Smart Mode — (switch 2 on; all other switches off) This
setting simplifies the configuration process by setting up the
OfficeConnect Remote 840 as a DHCP and DNS server with a fixed IP
address. For more information, see Chapter 2 of the Installation
Guide.
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Default Bridge Mode — There are several different settings for
Default Bridge Mode. The different settings control the WAN
operational mode; ATM or Frame Relay, and the VPI/VCI or DLCI
settings (see the table above). If you set the OfficeConnect Remote
840 to this mode and no configuration exists, the OfficeConnect
Remote 840 will automatically set up a bridge network on the
Ethernet and will create a VC profile that bridges using RFC 1483 or
RFC 1490 encapsulation with various VPI/VCI or DLCI values (see the
table above for details).
Configuration Overview 1-13
Configuration
Overview
The OfficeConnect Remote 840 configuration is divided into three areas:
Local Site (LAN), Remote Site (WAN), and Global configuration. The
following shows the areas of configuration for each.
Local Site
Remote Site
Network Service
Global
ATM
IP
IPX
IP
IPX
Bridging
DHCP
DNS
Administrative
Static WAN Routes
Bridging
To successfully configure the OfficeConnect Remote 840 to route or
bridge a network, you should perform the following steps.
General The following steps provide an outline to follow when configuring the
Configuration Steps OfficeConnect Remote 840 to route or bridge. For detailed instructions
on first time installation and basic configuration, see the OfficeConnect
Remote 840 SDSL Router Install Guide.
Perform the following steps to configure the OfficeConnect Remote 840
to route or bridge a network:
1 Complete the appropriate Configuration Planning Form. A form is
provided in the box when you purchase your OfficeConnect Remote 840.
Copies of the forms are provided in the OfficeConnect Remote 840 SDSL
Router Install Guide for your convenience.
2 Install the OfficeConnect Remote 840 utilities from your OfficeConnect
Remote 840 CD. If necessary, install a web browser on your workstation
(Microsoft Internet Explorer 4 is included on the CD).
3 Connect to the OfficeConnect Remote 840 through either the web
browser or the CLI.
4 Configure the OfficeConnect Remote 840.
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Ethernet Interface Protocols
IP, IPX, Bridging
Remote Sites
Global Parameters
Run the configuration audit.
Save the configuration.
1-14
CHAPTER 1: OVERVIEW
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Test the network accessibility.
Ping a remote site
Check the routing tables on configured protocols
How to Manage the
OfficeConnect
Remote 840
You can manage the OfficeConnect Remote 840 either through the
Command Line Interface (CLI) or through a web browser. If you choose to
manage the unit through CLI, see the OfficeConnect Remote 840 SDSL
Router CLI User's Guide, included on the CD shipped with your unit.
If you choose to use a web browser, you will use the web browser-based
OfficeConnect Remote 840 Manager. This user-friendly system is the
preferred method of management. The OfficeConnect Remote 840
Manager uses the HTTP protocol via a web browser (such as Netscape
Navigator or Microsoft Internet Explorer) to allow you to easily setup and
manage the OfficeConnect Remote 840. In order for the OfficeConnect
Remote 840 Manager to function correctly, you will need to use at least
Netscape Navigator 4.0 or Internet Explorer 3.02. Internet Explorer 4 is
provided on the OfficeConnect Remote 840 Installation CD.
You do not need to be connected to the Internet to use this method.
The main features of the OfficeConnect Remote 840 Manager are:
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Complete configuration control.
Configuration Audit for detecting errors.
Troubleshooting and monitoring capabilities.
Capability to download software updates.
The OfficeConnect Remote 840 must have an IP address and an
administrative login profile (username and password) in order to connect
to it with a browser. The IP address and administrative login profile are
automatically created when the unit is initially configured using the IP
Wizard or in DHCP Smart Mode or Default Bridge Mode, or the IP address
and administrative login profile can be created using the CLI.
See the OfficeConnect Remote 840 SDSL Router Installation Guide for
information about assigning an IP address and creating an administrative
login profile.
Starting the OfficeConnect Remote 840 Manager 1-15
Starting the
OfficeConnect
Remote 840
Manager
To access the OfficeConnect Remote 840 Manager, either enter the unit's
LAN IP address or DNS host name into the Location or Address field of
your web browser. When entering the IP address or DNS host name you
do not have to enter http:// (i.e., you can enter http://192.168.200.254 or
simply 192.168.200.254).
If you initially configured your unit with DHCP Smart Mode, your unit will
have an IP address of 192.168.200.254 and a DNS host name of
ocrdsl-3com.com.
When prompted to login to the unit, enter the administrative login name
and password. After successful authentication, you will access the
OfficeConnect Remote 840 Manager "home page."
OfficeConnect
Remote 840
Manager Menus
The OfficeConnect Remote 840 Manager is a hierarchical menu-based
interface. The highest level page in the hierarchy is the OfficeConnect
Remote 840 Manager home page. The home page displays a list of five
menu choices:
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Setup Wizard
Online Guide
Tools
Configuration
Monitor
Each of the 5 main menus contain sub-menus with more choices.
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CHAPTER 1: OVERVIEW
Using the
All OfficeConnect Remote 840 Manager screens have three basic areas:
OfficeConnect
Remote 840
Manager
Header
Quick Link Area
Main Area
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Header — Shows the title of the current page being accessed.
Quick Link Area — Indicates the position of the current page in the
OfficeConnect Remote 840 Manager menu hierarchy and provides
links which allow quick access to the home page and the five menu
options. This allows you to quickly go from one menu area to another,
such as from Configuration to Monitor.
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Main Area — Displays the current page containing configuration or
status information.
To access a particular OfficeConnect Remote 840 Manager page follow
the links through the menu hierarchy in the Main area. You can use the
Quick Link area to quickly get back to the top of the menu hierarchy or to
one of the five menu options selections.
You can configure your web browser's link display options to customize
the colors of the Quick Links.
Document Notation References to specific OfficeConnect Remote 840 Manager pages in this
document will use a specific notation to describe the location of a page
relative to the OfficeConnect Remote 840 Manager home page. The
notation uses the “>“ character to indicate that a sub-menu on a page
must be accessed.
For example, to monitor the IP ARP Table you would (starting from the
home page) access the Monitor menu. From the Monitor menu you
would access the Networks sub-menu. From the Networks sub-menu
you would access the IP sub-menu. Finally, from the IP sub-menu, you
would access the ARP Table page. This is specified as Monitor >
Networks > IP > ARP Table.
Where to Find More Configuration Information 1-17
Online Help The OfficeConnect Remote 840 Manager provides two methods of
obtaining help.
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The Online User's Guide. This guide contains detailed information
about configuring and using your OfficeConnect Remote 840. You
can access the Online User's Guide from the OfficeConnect Remote
840 Manager home page.
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A detailed HTML help screen is available for each configuration page.
There is a Help button at the bottom of each page requiring manual
data entry or selection. The help text describes the valid values for
each data entry field that may be entered on the current screen.
The Online User’s Guide and HTML help screens are not part of the
OfficeConnect Remote 840 operational software. They must be installed
on each workstation where you will run your OfficeConnect Remote 840
Manager browser. That is, if you have two workstations from which you
will run the OfficeConnect Remote 840 Manager, and if you want access
to the Online Guide and screen HTML help screens, you must run the CD
installation at both workstations.
Where to Find More
Configuration
Information
See the referenced chapters of this Guide to help you perform the
following tasks:
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Administrative Tasks such as updating software or controlling login
access — “System Administration”
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IP Routing Parameters — “Configuring IP Routing”
IPX Routing Parameters — “Configuring IPX Routing”
Bridging Parameters — “Configuring Bridging”
How to Monitor the OfficeConnect Remote 840 SDSL Router —
“Monitoring the OfficeConnect Remote 840”
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Configuring the OfficeConnect Remote 840 either for accessing the
Internet or for Telecommuting / Remote Access – OfficeConnect
Remote 840 SDSL Router Install Guide, Chapter 3.
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CHAPTER 1: OVERVIEW
SYSTEM ADMINISTRATION
2
Performing System
Administration
Tasks
This section describes the details for performing the following System
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“Modifying the Date and Time”
“Restoring Factory Defaults”
“Controlling SNMP Access”
“Controlling TFTP Access”
“Assigning SNMP Trap Managers”
“Assigning Syslog Managers”
Controlling Login
and Telnet Access
This allows you to set up management access security. The configured
username and password combination allows web browser and Telnet
access. Connecting to the OfficeConnect Remote 840 with a web
browser allows you to configure and monitor your unit using the
OfficeConnect Remote 840 Manager. Connecting using Telnet on a
workstation allows you to remotely manage the unit using CLI.
A default user name of root and password !root are provided by DHCP
Smart Mode and the IP Wizard during the initial installation. For secure
access, you should add a private login name and password and delete the
default name.
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CHAPTER 2: SYSTEM ADMINISTRATION
Adding a Login
1 From the home page, select Configuration > Global > Administrator
> Login. Click Add. The following screen fields appear:
2 Enter the following fields:
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User Name — Enter the login or Telnet username in this field.
Password — Enter the login or Telnet password in the field.
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3 After the fields have been entered, click Submit. To clear the fields, click
Reset.
Deleting a Login
1 From the home page, select Configuration > Global > Administrator
> Login. Click Add. The following screen fields appear:
2 Select the login name to be deleted.
3 Click Delete.
Modifying the Date and Time 2-3
Modifying the Date
and Time
This allows you to modify the system date and time.
1 From the home page, select Configuration > Global > Administrator
> Date and Time. The screen with the following fields appear:
2 Enter the date and time information, utilizing the correct formats as
shown next to the fields.
3 After the fields have been entered, click Submit. To clear the fields, click
Reset.
Restoring Factory
Defaults
Restoring the OfficeConnect Remote 840 to factory defaults causes all
configuration information to be deleted and the unit to be rebooted.
To check the boot mode, go to the Configuration > Global >
Administrator > System screen.
If you boot to the unconfigured state, you will need to run IP Wizard or
use CLI to reassign an IP address to your OfficeConnect Remote 840. If
you boot in DHCP Smart Mode, the IP address will be set to
192.168.200.254.
If you boot in Default Bridge Mode, you may not need an IP address
assigned to the unit. However, if you do want one, you must use
Command Line Interface. For detailed instructions on using CLI, please
see the OfficeConnect Remote 840 CLI User's Guide, printable or
viewable from the OCR840 CD.
You can set the switches before you restore the defaults to have the
OfficeConnect Remote 840 boot in the mode you wish. See Table 1–2,
DIP Switch Modes in Chapter 1 to select the mode you wish.
There are two ways to restore factory defaults:
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OfficeConnect Remote 840 Manager.
2-4
CHAPTER 2: SYSTEM ADMINISTRATION
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Reset button on the back of the unit.
Using the
1 Select Tools > Reboot.
OfficeConnect
Remote 840
Manager to Restore
Defaults
2 Select the Delete all configuration and reboot device information
option.
3 Click Submit.
4 Wait one minute. Then, configure an IP address if DHCP Smart Mode is
not in use.
5 Open up the web browser and start the OfficeConnect Remote 840
Manager by entering the new IP address in the browser
location/address box.
Using the Reset 1 Turn the OfficeConnect Remote 840 off by unplugging the unit.
Button
2 At this time, set the DIP switches to their appropriate settings (DHCP
Smart Mode, Default Bridge Mode, or Unconfigured Mode). If you
select Unconfigured Mode, you can set one of the other modes later
using CLI or the OfficeConnect Remote 840 Manager.
3 While holding down the Reset button on the back panel, plug the
unit back in. You should hold down the reset button for at least five
seconds after plugging the unit back in. The unit takes about one
minute to come up and the Alert LED will flash until bootup is finished.
4 If DHCP Smart Mode is not in use, configure an IP address after the
unit comes up.
Manager by entering the new IP address in the browser
location/address box.
Updating
See “Upgrading Operational Software for the OfficeConnect Remote
840” in Chapter 10 for information on updating the operational and
system software.
OfficeConnect
Remote 840
Software
Controlling SNMP
Access
The Simple Network Management Protocol (SNMP) is used for
managing routers and other network devices from a central station or
Controlling SNMP Access 2-5
stations. These stations, the SNMP Managers, query the managed units
for configuration and monitoring information.
The OfficeConnect Remote 840 can be managed by SNMP Managers in
read-only or read-write mode.
Using SNMP to manage the OfficeConnect Remote 840 is more
complicated than the preferred method of management, the
OfficeConnect Remote 840 Manager.
SNMP access is provided by an SNMP community name and access mode.
To Download the Management Information Base (MIB) files, go to the
website, http://www.3com.com/support/ocr840/index.html, and click
the drop-down menu under software/MIB downloads.
To set up an SNMP community on the OfficeConnect Remote 840, follow
these instructions:
1 From the home page, select Configuration > Global > Administrator
> SNMP. Click Add and the following screen fields appear:
2 Enter the following fields:
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Name — Enter the community name to be used as the access name.
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Address — Enter the address of the SNMP server (e.g.,
192.168.200.52).
Specifying 0.0.0.0 allows any SNMP server access if they supply the
correct name.
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Access — Check the box for Read Only or Read & Write. Read Only
allows only the user to view the screens.
3 After the fields have been entered, click Submit. To clear the fields, click
Reset.
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CHAPTER 2: SYSTEM ADMINISTRATION
4 Repeat steps 1-3 for each management station which is a part of this
community.
Be careful to have the Access box checked the same for each new
member of the community.
The entire community will be given the access rights of the last member.
5 To alter previously set Access Rights, follow step 1 and select the
community from the community list and click Modify.
6 To delete a management station from a community, go to the home page
and, select Configuration > Global > Administrator > SNMP. Select
the community and management station from the lists and click Delete.
Controlling TFTP
Access
The Trivial File Transfer Protocol (TFTP) provides a simple way to
transfer files from one machine to another. The OfficeConnect Remote
840 has a TFTP server that allows you to copy files to or from the unit. All
you have to do is set up TFTP access on the OfficeConnect Remote 840
and run a TFTP client program on a workstation. TFTP transfers files over
either the LAN or WAN interfaces.
To configure the OfficeConnect Remote 840 to provide TFTP access,
follow the instructions below:
1 From the home page, select Configuration > Global > Administrator
> TFTP. Click Add and the following fields appear:
2 Enter the address of the client workstation or select Any Client for
unrestricted client access.
3 After the fields have been entered, click Submit. To clear the fields, click
Reset.
Assigning SNMP Trap Managers 2-7
Assigning SNMP
Trap Managers
An SNMP trap is an event that causes the OfficeConnect Remote 840 to
send an unsolicited message to a SNMP manager.
These events are generally critical events that indicate an operational
problem. (Critical events can also be viewed on the OfficeConnect
Remote 840 Manager's Monitor > Events > Critical Event Log screen.)
To configure the OfficeConnect Remote 840 to send traps, follow these
instructions:
1 From the home page, select Configuration > Global > Administrator
> TRAP. Click Add and the following screen fields appear:
2 Enter the following fields:
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Name — Enter the name of the SNMP Trap Manager.
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Address — Enter the address of the SNMP Trap Manager (e.g.,
192.168.200.50).
Specifying 0.0.0.0 causes SNMP Traps to be broadcast.
3 After the fields have been entered, click Submit. To clear the fields, click
Reset.
To alter previously set fields, follow step 1 and select an SNMP Trap
Manager, then click Modify. To delete a server from your configuration,
select an SNMP Trap Manager from the TRAP screen and click Delete.
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CHAPTER 2: SYSTEM ADMINISTRATION
Assigning Syslog
Managers
A Syslog manager is a workstation that accepts and saves informational
messages from a network device. The OfficeConnect Remote 840
Manager can be configured to send log messages to a syslog manager as
follows:
1 From the home page, select Configuration > Global > Administrator
> Syslog. Click Add and the following screen fields appear:
2 Enter the following fields:
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Syslog Host IP Address — Enter the address of the Syslog host.
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System Level — Select one of the following levels: Critical, Unusual,
Common, Verbose, and Debug.
3 After you enter the fields, click Submit. To clear the fields, click Reset.
REMOTE SITE MANAGEMENT
3
Introduction
divided into the following parts:
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“Remote Site Overview”
“Managing a Remote Site Profile”
“Configuring Network Service Information (PPP / RFC 1483 / RFC
1490)”
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“Configuring ATM Information”
“Configuring Protocol Parameters”
“Monitoring Remote Site Connections”
Remote Site
Overview
To set up connections over the WAN, a remote site profile must be
created and edited for each remote location you want to connect to.
With this profile, you specify ATM virtual circuit or Frame Relay DLCI
information, protocols, and addresses that determine the method of
connection and communication to the remote site.
You first need to add a remote site profile, and then you modify the
profile to include WAN connection and network information.
The following list summarizes the necessary information.
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WAN — Network Service (PPP / RFC 1483/RFC 1490) information, and
ATM Virtual Channel (VC) or Frame Relay (DLCI) information
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IP — IP addresses, address translation tables, static routes, and RIP
usage.
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CHAPTER 3: REMOTE SITE MANAGEMENT
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IPX — IPX network address information, static routes and services,
and RIP usage.
Bridging — Bridging (enable / disable) to the remote site.
If you need to connect to multiple remote sites such as the Internet and a
remote office, you should set up a remote site profile for each location.
Managing a
Remote Site Profile
Once created, remote site profiles can be enabled or disabled. When a
profile is enabled, the OfficeConnect Remote 840 reads the connection
parameters for the remote site from the profile and continuously
attempts to establish a connection to the remote site.
When a profile is disabled, the connection will be terminated and no
other data will be directed to the remote site.
Configuration changes to a remote site profile do not take effect until the
next time the profile is enabled. The OfficeConnect Remote 840 Manager
automatically disables and re-enables the remote site profile when the
Modify button is pressed on the Remote Site menu page.
To disable or enable a profile manually, clear or check the Enable
Remote Site checkbox as appropriate.
Once you start modifying a Remote Site, you must click Modify before
you exit the Remote Site screens, or else the data you entered will be lost.
Also, remember to save your configuration before rebooting your
OfficeConnect Remote 840 so that your changes will be written to
permanent FLASH memory.
Adding a Remote Site
Profile
1 From the OfficeConnect Remote 840 Manager home page, select
Configuration > Remote Sites (WAN). Then click the Add button to
bring up the Remote Site General Add screen.
2 Enter the Remote Site Name. Enter a name to use to identify the remote
site profile. (Ex: ISP or CorpOffice)
3 Ensure that the Enable Remote Site box is checked if you want to the
connection to come up as soon as you finish the configuration.
Managing a Remote Site Profile 3-3
4 Click Add. Then click Save Configuration on the sidebar to
permanently save the changes.
The Network Service (PPP and RFC 1483/ RFC 1490), ATM, and network
protocol (Bridging, IP, and IPX) information has not been configured yet.
To make a connection with the remote site you must configure the
Network Service, ATM, and at least one network protocol. (See
“Configuring Network Service Information (PPP / RFC 1483 / RFC 1490)”,
“Configuring ATM Information”, and “Configuring Protocol Parameters”
for details.)
Modifying a Remote
Site Profile
1 From the OfficeConnect Remote 840 home page, select Configuration
> Remote Site (WAN).
2 Select the name of a remote site profile and click Modify. This brings up
the Remote Site General Modify screen.
3 Change configuration parameters as needed and use the Next button to
For quick help on specific parameters, click the Help button located at
the bottom of each screen.
For more detailed help, go to the appropriate place in this guide (see
“Configuring ATM Information” and Configuring Other WAN
Parameters).
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Click Modify on any screen to set all the Remote Site parameters.
Click Save Configuration on the sidebar to permanently save the
changes.
Deleting a Remote
Site Profile
1 From the OfficeConnect Remote 840 home page, select Configuration
> Remote Site (WAN).
2 Select the name of a remote site profile and click Delete. This brings up
the Remote Site General Delete screen.
3 To delete the profile, click Delete. To return to the remote site profile
selection list, click Prev.
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CHAPTER 3: REMOTE SITE MANAGEMENT
Configuring
A Network Service defines the data encapsulation and protocol
characteristics for the connection between two packet switching devices.
Network Service
Information (PPP /
RFC 1483 / RFC
1490)
The OfficeConnect Remote 840 supports PPP, RFC 1483 and RFC 1490
Network Services. The OfficeConnect Remote 840 and the remote site
must both use the same Network Service in order for a connection to be
established.
For PPP, the authentication name and password must be provided to
allow the connection to be established. The OfficeConnect Remote 840
supports both PAP and CHAP authentication.
The Network Service parameters can be configured on the Remote Sites
General screen.
1 Access this screen by going to the OfficeConnect Remote 840 home
page. Select Configuration > Remote Sites (WAN), select a defined
remote site and click Modify.
2 This will access the Remote Sites General Modify Screen.
3 If your unit is using ATM, the Remote Sites General Modify Screen will
contain the following fields:
Configuring Network Service Information (PPP / RFC 1483 / RFC 1490) 3-5
4 Select the network service to be either RFC 1483, or PPP.
If PPP, enter the Authentication Name and Authentication Password
provided to you. You can change the header compression from the
default of none to TCP/IP if you wish.
5 Click Next to proceed to the ATM Configuration screen.
Frame Relay
1 If your unit is using Frame Relay, the Remote Sites General Modify
screen will contain the following fields:
2 Enter a name to identify the remote site.
3 Select Network Service to either PPP over Frame Relay or RFC 1490.
If you select PPP over Frame Relay, enter the Authentication Name and
Authentication Password provided to you. You can change the header
compression from the default of None to TCP/IP if you wish.
4 Enter the DLCI.
5 Check the Enable Bridging and Enable MAC Encapsulated Routing
boxes according to your service provider’s directions.
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CHAPTER 3: REMOTE SITE MANAGEMENT
6 Check the Enable Remote Site box.
Configuring ATM
Information
The ATM parameters are supplied by your service provider. These
parameters consist of:
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ATM VC information
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ATM Category of Service parameters
ATM allows for permanent connections (PVCs) and switched connections
(SVCs). For a PVC, the required VC information parameters consist of the
Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI).
The VPI / VCI uniquely specify the path to the remote site and are placed
in the ATM cell header that is used to route each cell to the remote site.
Two remote site profiles with the same VPI and VCI cannot be active
simultaneously. You may encounter this situation if you want to log in to
the same remote site with different PPP authentication parameters. You
should disable all profiles using the same VPI / VCI and then enable the
one that should be active.
For SVCs, there is not a fixed VPI / VCI. Instead, a destination address is
used to set up a path through the ATM backbone network when the
connection is to be established. Currently, the SVC capability is disabled in
the OfficeConnect Remote 840.
ATM Category of Service parameters specify characteristics (also referred
to as traffic shaping) of data transmitted from the OfficeConnect Remote
840 to the remote site. They have no effect on data transmitted from the
remote site to the OfficeConnect Remote 840.
ATM Modify Screen Go to Configuration > Remote Sites (WAN). Select a site from the list
and click Modify.
Click Next to proceed to the ATM Modify screen. The screen contains
the following fields:
Configuring ATM Information 3-7
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If PVC is selected, enter the VPI and VCI.
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VPI — The Virtual Path Identifier (VPI) is part of the cell header for
the cells that are transferred over this connection.
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VCI — The Virtual Channel Identifier (VCI) is part of the cell header
for the cells that are transferred over this connection. If you are
configuring multiple VCs, enter the number of the respective VC in
this field.
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If necessary, enter any Category of Service parameters that have been
provided to you.
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UBR — Unspecified Bit Rate; no limit has been specified for the
rate for information flow.
VBR — Variable Bit Rate; a certain rate has been specified for the
flow of information.
CBR — Constant Bit Rate; a constant rate has been specified for
the flow of information.
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Enter the cell rate transmission parameters, if applicable.
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PCR — The Peak Cell Rate is the maximum amount of cells per
second transmitted over this connection. This is determined by the
minimum intercell spacing in seconds, which is the time interval
from the first bit of one cell to the first bit of the next cell.
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SCR — The Sustainable Cell Rate, in cells/second. This is the rate at
which cells are transmitted over this connection. This is the
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CHAPTER 3: REMOTE SITE MANAGEMENT
maximum average rate or cells that are sent in bursts at a peak
rate.
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BT — The Burst Tolerance (also referred to as Maximum Burst Size),
in cells/second. This is the maximum number of cells that can be
sent at the peak rate.
If no traffic shaping parameters have been provided you should choose
the default parameter of UBR with a PCR value of 0. The OfficeConnect
Remote 840 will attempt to use all of the upstream bandwidth when
transmitting data to the remote site.
Configuring
Protocol Parameters as IP routing, IPX routing, Bridging, and Address Translation. Instructions
for configuring these parameters are located in:
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“Configuring IP Routing”
“Configuring IPX Routing”
“Configuring Bridging”
“Network Address Translation Using the OfficeConnect Remote 840”
Monitoring Remote
Site Connections
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To determine which remote sites have been configured and to see a
summary of the remote site WAN parameters, access the Monitor >
Remote Sites > Remote Site Status screen.
To monitor packet counters for a specific remote site, access the
Monitor > Remote Sites > Remote Site Counters screen. (Remote
Site Counters are only applicable for active connections.)
To determine whether a remote site connection has been established
or to determine why a connection is not working properly, check the
connection event log. This log is accessed at Monitor > Events >
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To monitor throughput for all active remote sites, access the Monitor
> ATM Throughput screen.
For more information on these and other monitoring capabilities, see
Chapter 11, “Monitoring the OfficeConnect Remote 840”.
CONFIGURING IP ROUTING
4
Introduction
using the OfficeConnect Remote 840. It is divided into the following
sections:
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“Overview”
“Enabling IP Routing”
“Configuring IP for the LAN”
“Configuring IP Static and Framed Routes”
“Using IP Address Validation”
“Monitoring”
“IP Testing (PING)”
Overview
The OfficeConnect Remote 840 can be configured as a router to forward
packets between the local LAN interface and one or more Remote Sites.
The router maintains a forwarding table. This table specifies which
interface to route an IP packet based on the destination IP address.
Entries in the forwarding table are either static or dynamic. Static entries
are based on the LAN's and Remote Site's subnet addresses and user
configured static routes. Dynamic entries are added when Routing
Information Protocol (RIP) is enabled and routes are learned from
neighboring routers.
The OfficeConnect Remote 840 does not support OSPF (Open Shortest
Path First) protocol.
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CHAPTER 4: CONFIGURING IP ROUTING
To configure IP routing, IP must be defined on both the LAN interface and
one or more remote sites. On the LAN, an IP network must exist and it
must have a specified IP address and subnet mask. On the remote sites, IP
routing needs to be enabled, and the remote router address, a remote
subnet mask and local WAN interface address need to be configured. The
remote site address configuration can be learned dynamically when the
remote site connection is established if the network service is PPP,
otherwise it has to be specified.
Enabling IP Routing
When the OfficeConnect Remote 840 is to be used for IP Routing,
forwarding must be enabled in the global IP setting.
Access the IP Screen through Configuration > Global > IP > IP
Settings. This screen contains the following fields:
Check the Forwarding box to enable the routing of IP packets.
In addition to Forwarding, the RIP check box is used to enable or disable
RIP for all Remote Sites and the local LAN. If RIP is globally disabled, it is
disabled for the local LAN and Remote Sites on the OfficeConnect
Remote 840. If RIP is globally enabled, it can be enabled or disabled on
the local LAN and for each Remote Site.
Configuring IP for
the LAN
To configure IP over the LAN, assign an IP network to the LAN port by
providing a name and a network address. After adding a network, you
can modify advanced parameters.
If you ran the IP Wizard or booted the unit in DHCP Smart Mode, an IP
network has already been added over the LAN port. Its name is IP and its
address is either entered from the IP Wizard or it is 192.168.200.254. You
can view or modify configuration parameters for this network (e.g.,
Enable RIP).
If you use this IP address for accessing the OfficeConnect Remote 840
Manager, be careful not to delete the network.
For routing to take place across the OfficeConnect Remote 840, you also
have to set up a corresponding network over the WAN port (see
“Configuring IP for the Remote Site Connection”).
Use the Configuration > Local Site (LAN) > IP screen to define or
modify all IP networks over the LAN. Note that all IP networks defined
over the LAN only support Ethernet II framing.
Adding a Local IP You may add multiple IP networks over the Ethernet interface by
Network following these steps:
Select Configuration > Local Site (LAN) > IP.
Click Add. This brings up a screen containing the following fields:
Enter the following information:
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Name — The name is limited to 32 characters. If you use any blank
spaces, surround the whole phrase with double quotes (e.g., “test site
x”).
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LAN Address — Enter the address of the IP network in this format:
ddd.ddd.ddd.ddd where ddd is a value between 1--255.
LAN Mask — Enter the mask of the IP network in this format:
ddd.ddd.ddd.ddd where ddd is a value between 0--255.
By default, RIP is not enabled for this new IP network. If you wish to
enable RIP, proceed to the Modify portion of the following section.
Click Add when you have entered these fields. This returns to the IP
menu screen.
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CHAPTER 4: CONFIGURING IP ROUTING
Resetting Parameters If you need to return to the original parameters for this screen, click
Reset before you click Add.
Modifying or To modify information pertaining to an existing IP network, or to delete
Deleting an IP that information from your configuration, follow these steps:
Network
1 Proceed to the IP screen, following steps from the previous section.
2 Select an IP network you wish to modify or delete.
3 Click Modify/Delete.This brings up the IP Modify/Delete screen
containing the following fields:
4 Modify or delete the information about the selected IP network by
altering the fields and clicking the Modify/Delete button.
If you alter the address that your browser is using, the connection will be
lost. To reconnect, enter the new IP address in your browser's
address/location field. If you delete the address, you will also lose the
connection. You will not be able to reconnect until a new address is
assigned using either the IP Wizard, CLI, or by rebooting in DHCP Smart
Mode.
5 If you need to return to the original parameters for this screen, click
Reset before you click Modify.
Configuring IP RIP on the LAN 4-5
Configuring IP RIP
on the LAN
RIP is utilized as a means of communicating routing information between
routers. This is done to keep the routers updated on information.
Local Site (LAN) RIP The RIP options for the LAN can be accessed through Configuration >
Local Site > IP. Select a defined local site connection from the list and
click Modify/Delete, which accesses the IP Modify/Delete screen,
containing the following fields:
You can then select the RIP version to be either None, RIPV1, or RIPV2.
You can also modify the Advanced RIP parameters. You should not need
to change any of these parameters from the defaults, but you can if
necessary.
Advanced RIP Select a local site connection from the list on the main IP screen, and click
Modification Options Advanced.
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CHAPTER 4: CONFIGURING IP ROUTING
This brings up a screen containing the following fields:
1 You may enter the following fields:
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Broadcast Address - Check one of two options: All Ones or All Zeroes.
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Max Reassembly - Enter the maximum value that your network cannot
exceed for this function.
2 Under the following two categories, you may customize your RIP:
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Advanced RIP Policies - You may enable these options as necessary.
They control what is sent out or received concerning RIP.
3 Click Submit when the fields have been entered to save your
customizations.
Resetting Parameters
If you need to return to the original parameters for this screen, click
Reset before you click Add.
Configuring IP for the Remote Site Connection 4-7
Configuring IP for
the Remote Site
Connection
To set up connections over the WAN, a remote site profile must be
created and edited for each remote location you want to connect to.
With this profile, you specify ATM virtual circuit information, protocols,
and addresses that determine the method of connection and
communication to that remote site.
You first need to add a remote site profile, then modify the profile to
include WAN connection and network information. The following list
summarizes the necessary information:
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Frame Relay/ATM WAN — Network Service (PPP/RFC 1483/ RFC
1490) information, ATM VC information
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IP — IP addresses, address translation tables, static routes, RIP usage
IPX — IPX network address information, static routes and services, RIP
usage
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Bridging — Enable or disable bridging to the remote site
If you need to connect to multiple remote sites (i.e., the Internet and a
remote office) you should set up a remote site profile for each location.
Configuring IP The following steps illustrate how you configure the IP parameters of the
Parameters for the remote site profile.
Remote Site
These instructions assume you have already added a remote site profile. If
you need to add a remote site profile, select Add instead of Modify in
step 1.
1 Access this screen by going to the OfficeConnect Remote 840 home
page. Select Configuration > Remote Sites (WAN), and click Modify.
This will access the Remote Sites General screen.
2 Continue clicking Next to advance through the ATM Modify screen to
the IP Modify screen.
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CHAPTER 4: CONFIGURING IP ROUTING
Configure the The following steps illustrate how you configure the remote site IP
Remote Site IP network information.
Network Information
1 Complete the following entries:
Local WAN IP Address:
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If you were provided a single IP address, select Specified and enter
that address.
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If you are using PPP to dynamically assign an address, select Dynamic,
and the remote site on the WAN will assign a local WAN IP address to
the WAN port of your OfficeConnect Remote 840.
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Otherwise, select Unnumbered, and there will be no IP address
assigned to the local WAN interface for this VC.
Configuring IP for the Remote Site Connection 4-9
Remote WAN IP Address:
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If you were provided a remote IP address and netmask, select
Specified and type in that address and netmask.
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If the OfficeConnect Remote 840 is learning the remote IP address
from the remote site (PPP only), select Learn from Remote.
2 In order to have the remote site you are configuring as the default
gateway, check the Use Remote as Default Gateway checkbox.
3 If you are routing IP traffic to multiple remote sites, select one to be your
default gateway. Then check this box only in the profile for that remote
site.
4 Select from the pull-down menu to have the RIP set to Broadcast, Listen,
or Broadcast & Listen, and if one of these is chosen, set the RIP option to
RIPV1 or RIPV2.
If you are using address translation (PAT / NAT), you must set routing to
either Listen or None. This is because you have set up a private network
and therefore do not want to be broadcasting information to other
routers.
5 Ensure that Enable IP is checked (enabled) and click Modify.
Site Connection.
Further Remote Site IP Configuration information is available in the
following sections:
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Address Translation information is available in “Network Address
Translation Using the OfficeConnect Remote 840”.
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Address Validation Information is available under “Using IP Address
Validation”.
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