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reserves the right to revise this publi cation and to make changes f rom ti m e to ti me in the contents hereof without
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Changes and enhancements to the product and to the information herein will be documented and issued as a new
release to this manual.
W arran ty, Sales, Service, and Training Inform a tion
Contact yo ur loc al sales r eprese ntati v e, service r epresent ativ e , or dist ribut or di rec tly f or an y hel p need ed. F or addit ional
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Paradyne worldwide office locations, use one of the following methods:
Internet: Visit the Paradyne World Wide Web site at www.paradyne.com. (Be sure to register your warranty at
www.paradyne.com/warranty.)
Telephone: Call our automated system to receive current information by fax or to speak with a company
representative.
— Within the U.S.A., call 1-800- 870-2221
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Trademarks
ACCULINK, COMSPHERE, F rameSaver, Hotwire, MVL, Next EDGE, OpenLane, and Per formance Wizard are
registere d tr adem arks of Paradyne Corporation. ReachDSL and TruePut are tradem arks of Paradyne Corporation. All
other product s and services mentioned h erei n are the trademarks , service marks, registered trademarks, or registered
service marks of their respective owners.
This guide describes how to configure and operate Hotwire DSL routers. It
addresses the following models:
Hotwire 6301/6302 IDSL Router
Hotwire 6341/6342 Symmetric DSL Router
Hotwire 6351 ReachDSL Router
Hotwire 6371 RADSL Router
This document is intended for administrators and operators who maintain the
endpoints at customer premises. A basic understanding of internetworking
protocols and their features is assumed. Specifically, you should have familiarity
with the following inter networ king conc epts:
TCP/IP applications
IP and subnet addressing
IP routing
Bridging
It is also assumed that you have already installed a Hotwire DSL Router. If not,
refer to
Product-Related Documents
for installation documents.
6300-A2-GB20-00March 2002
vii
About This Guide
New Features for this Re lease
This version of the
firmware release which adds the following new features for the Hotwire
6351 ReachDSL Router only:
Telnet access to the Command Line Interface (CLI) in the service domain for
Network Service Provider (NSP) use.
TFTP client support for NSP service domain software downloads.
SYSLOG availa bilit y in the s e rvice dom a in.
Point-to-Point Protocol over Ethernet (PPPoE) client provided as defined in
RFC 2516.
Asymmetric maximum upstream /downstream setting.
Previous versions of the
Refer to
Product-Related Documents
Hotwire DSL Routers User’s Guide
DSL Router User’s Guide
for more information.
documents the 4.3.x
are numbered 6371-A2-GB20.
viii
March 20026300-A2-GB20-00
Document Summary
SectionDescription
About This Guide
Chapter 1,
DSL Routers
Chapter 2,
Router
Chapter 3,
Router
Chapter 4,
Configuration Examples
Chapter 5,
Router
Chapter 6,
Troubleshooting
Appendix A,
Interface
Appendix B,
and Command Line Shortcuts
Appendix C,
Appendix D,
Emulation
Introdu c ti o n to Hot w ire
Accessing the DSL
Configuring the DSL
DSL Router
Monitoring the DSL
Diagnostics and
Command Line
Configuration Defaul ts
Traps and MIBs
DSL Router Terminal
Provides an overview of the Hotwire DSL Routers.
Describes the Hotwire DSL Route rs access control
and provides in structions on how to log in and log
out of the system.
Describes the DSL router interf ac es , Domain Types ,
IP Routing, and network considerations.
Presents several common DSL router configuration
examples.
Describes operator programs that monitor the
Hotwire system.
Describes common Hotwire operational problems
and solutions . Contains SysLog information.
Provides explanation of the DSL router’s Command
Line Interface and command syntax with e xam ples.
Provides a list of all configuration options with
factory def aul t se ttings and a li st of all co mmand line
shortcuts with the abbre viated command line input.
Summarizes the MIBs and SNMP traps supported
by the DSL routers.
Provides configuration setup procedures for two
common text file programs.
Appendix E,
Index
Firmware Upgrade
Provides commands and procedures for performing
a firmware upgrade for the Hotwire 6351 ReachDSL
Router from the service domain.
Lists key terms, acronyms, concepts, and sections
in alphabetical order.
A master glossary of terms and acronyms used in Paradyne documents is
available on the Web at
Manuals
→
Technical Glossary.
www.paradyne.com
. Select
Library → Technical
6300-A2-GB20-00March 2002
ix
About This Guide
Product-Related Documents
Document NumberDocument Title
5030-A2-GN10
5038-A2-GN10
6050-A2-GZ40
6301-A2-GN10
6341-A2-GN10
6351-A2-GN10
6371-A2-GB20
6371-A2-GN10
8000-A2-GB22
8000-A2-GB26
Hotwire 5030 POTS Splitter Customer Premises
Install at i on Instructions
(MCC) Card, IP Conservative, User's Guide
Hotwire MVL, ReachDSL, RADSL, IDSL, and SDSL
Cards, Models 8310, 8312/8314, 8510/8373/8374,
8303/8304, and 8343/8344, User's Guide
(previous versions of
Contact your sales or service representative to order additional product
documentation.
Paradyne documents are also available on the World Wide Web at
www.paradyne.com
Hotwire DSL Systems
. Select
.
Library → Technical Manuals →
x
March 20026300-A2-GB20-00
Document Conventions
The following conventions are used throughout this document.
ConventionTranslation
About This Guide
[ ]
{ }
|
Italics
Bold
x.x.x.x
xx:xx:xx:xx:xx:xx
Square brackets represent an optional element.
Braces represent a required entry.
Vertical bar separates mutually exclusive elements.
Entry is a variable to be supplied by the operator.
Enter (type) as shown.
32-bit IP address and mask information where x is an
8-bit weighted decimal notation.
MAC address information where x is a hexadecimal
notation.
6300-A2-GB20-00March 2002
xi
About This Guide
xii
March 20026300-A2-GB20-00
Introduction to Hotwire
DSL Routers
What is a Hotwire DSL Router?
The Hotwire® DSL (Digital Subscriber Line) Router operates as a bridge and IP
router connecting a DSL link to an Ethernet network. This system provides
high-speed access to the Internet or a corporate network over a traditional
twisted-pair copper telephone line to the end user.
DSL Technologies Suppor ted
Paradyne’s Hotwire DSL network suppor ts the following types of technologies:
1
Hotwire IDSL (ISDN DSL) products provide IDSL multirate symmetr ic packet
transport and can operate over a connection with an ISDN repeater or digital
facilities. Data rates of 64 Kbps, 128 Kbps, or 144 Kbps can be configured.
Hotwire SDSL (Symmetric DSL) packet-based products provide high-speed
symmetric DSL services with bandwidth for business applications. These
products are configurable from 144 Kbps up to 2.3 Mbps. This gives servi ce
providers the opportunity to sell multiple services with a single product.
Hotwire ReachDSL™ packet-based products provide high-speed Inter net or
corporate LAN access over traditional twisted-pair copper telephone wiring,
regardless of line conditions (poor quality loops, long loops, or bad wiring at
customer premises), for guaranteed service delivery up to 18,000 feet. These
products are configurable from 128 Kbps up to 960 Kbps and give service
providers the opportunity to sell multiple services using a single product.
Hotwire RADSL (Rate Adaptive DSL) products are applicable for both
asymmetric and symmetr ic applic ations. The 1 Mbps symmetric operation is
ideal for traditional business applications while the 7 Mbps downstream with
1.1 M bps ups tream asy mmet ric operation provides added bandwidth for
corporate Internet access. RADSL products can also save line costs by
optionally supporting simultan eous data and voice over the same line.
6300-A2-GB20-00March 2002
1-1
1. Introduction to Hotwire DSL Routers
Typical DSL Router System
DSL is a local loop technology that uses standard twisted-pair copper wire to
support high-speed access over a single pair of twisted copper wires. DSL
applications are point-to-point, requiring DSL devices at central and end-user
sites.
Hotwire DSL routers interoperate with the following types of Hotwire DSL line
cards, at the DSLAM (Digital Subscriber Line Access Multiplexer) or GranDSLAM
chassis, to deliver applications at high speeds, supporting packet services over a
DSL link:
Hotwire 8303 or 8304 IDSL Cards interoperate with two Hotwire IDSL
Routers:
— Hotwire 6301 IDSL Router with one Ethernet por t
— Hotwire 6302 IDSL Router with a 4-port Ethern et hub
Hotwire 8343 or 8344 SDSL Cards interoperate with two Hotwire Symmetric
DSL Routers:
— Hotwire 6341 SDSL Router with one Ethernet por t
— Hotwire 6342 SDSL Router with a 4-port Ether net hub
Hotwire 8312 or 8314 ReachDSL Cards interoperate with the Hotwire 6351
ReachDSL Router with one Ethernet por t
Hotwire 8510, 8373, and 8374 RADSL Cards interoperate with the Hotwire
6371 RADSL Router with one Ethernet por t
The following illustration sh ow s a typica l Hotwire system with a Hotwire DSL
Router. All Hotwire DSL routers transport data. The Hotwire 6371 RADSL Router
can transport data and POTS simultaneously.
Customer Premises (CP)
Data
Interface
SN
POTS
Voice
Interface
CP
POTS
Splitter
Optional
Network
Service
Provider
Central Office (CO)
Hotwire
IPC
ATM
SCM
DSL
CARD
GranDSLAM
CO
POTS
Splitter
Switched
Network
Optional
MDF
POTS/DSL
Legend: DSL – Digital Subscriber LineIPC–Interworking Packet Concentrator
1-2
March 20026300-A2-GB20-00
MDF – Main Distribution FramePOTS –Plain Old Telephone Service
SN – Service Node
01-16968
Hotwire DSL Router Features
Hotwire DSL routers contain the following features.
1. Introduction to Hotwire DSL Routers
IP rout ing with
:
— NAT (Network Address Translation)
— NAPT (Network Address Port Translation), also called PAT (Port Address
Translation)
— Simultaneous Basic NAT (for several fixed servers) and NAPT (on the rest
of the PCs on the LAN)
— DHCP Server (Dynamic Host Configuration Protocol) and DHCP Relay
Agent
— A full set of IP filters, two per DSL card (one for upstream and one for
downstream traffic), with up to 33 rules per filter
— SNMP Set/Get capability
Three Configurable Modes of Operation.
Supports the following modes of
operation:
— IP routing only
— IP routing, and bridging of all other protocols (using VNET mode)
— Bridging all protocols (using VNET mode)
Protocol Filters.
Provides th e ab ilit y to:
— Filter MAC frames when bridging
— Configure two Ethertype filters via the Hotwire DSL card, one for upstream
and one for downstream traffic, with up to 16 f ilter rules per filter
— Compare the Ethertype in frames to a particular value, or configured set of
values, to perform filtering
— Support ICMP (Inter net Control Manage men t Protocol) filters for firewalls
via the Hotwire DSL card, based on the ICMP message type, to
selectively discard some ICMP message types while forwarding others
High-speed Internet or intranet access.
Diagnostics.
Provides the capability to diagnose device and network
problems and perform tests.
Device and Test Monitoring.
Provides the capability of tracking and
evaluating the unit’s operation.
Remote Firmw are D own load.
Provides easy setup and activation of
firmware upgrades from a remote location.
Security.
Provides multiple levels of security, which prevents unauthorized
access to the DSL router.
6300-A2-GB20-00March 2002
1-3
1. Introduction to Hotwire DSL Routers
In addition, the following features are provided for the Hotwire 6351 ReachDSL
Router:
Service Subscriber
The Service Subscriber is the user (or set of users) that has contracted to receive
networking services (e.g., Internet access, remote LAN access) for the end-user
system from an NSP (Network Service Provider). Service subscribers may be:
Console Terminal Interface.
Provides an interface for:
— Configuring and managing the DSL router
— Local console access
Management from an NMS usi ng SNMP.
Telnet access to the Command Line Interface (CLI) in the service domain for
Network Service Provider (NSP) use.
TFTP client support for NSP service domain software downloads.
SYSLOG availa bilit y in the s e rvice dom a in.
Point-to-Point Protocol over Ethernet (PPPoE) client provided as defined in
RFC 2516.
Asymmetric maximum upstream /downstream setting.
Residential users connected to public network services (e.g., the Internet)
Work-at-home users connected to their corporate intranet LAN
Commercial users at corporate locations (e.g., branch offices) connected to
other corporate locations or connected to public network services
A Hotwire DSL Router must be installed at the customer premises to provide the
end user with access to any of the above services.
NOTE:
If you would like more information on DSL-based services, applications, and
network deployment, refer to Paradyne’s
The DSL Sourcebook.
may be downloaded or ordered through Paradyne’s World Wide Web site at
www.paradyne.com/library
.
The book
1-4
March 20026300-A2-GB20-00
Accessing the DSL Router
Access Control to the DSL Router
The Hotwire DSL Router can be managed from an NMS using SNMP or from the
Command Line Interface (CLI). There are several methods av ai lab l e for accessing
the command line interface:
Local access at the DSL router through the Console port.
Access by a Telnet session (controlled through the management interface at
the Hotwire chassis).
For the Hotwire 6351 ReachDSL Router, access by a Telnet session from the
service domain.
2
Levels of Access
The Hotwire DSL Router accepts only one login session at a time.
There are two levels of privileges on the Hotwire DSL system:
Administrator
— Administrator, non-configuration mod e: Provide s read-onl y capabilities.
This is the same level of access as Operator.
— Administrator, configuration mode: Provides complete write access to the
DSL router.
Operator
with no modification permission and no access to managem ent functions.
Refer to Appendix A,
command line entry.
For local console access, the Operator and Administrator have the same Login ID ,
but with different passwords for their access level. For Telnet access through the
service domain for the ReachDSL Router, up to four login/password/access level
combinations can be configured.
. The Administrator has two levels of access to the DSL router.
. The Operator has read-only access to display device information
Command Line Interface
, for access level details f o r ea ch
6300-A2-GB20-00March 2002
2-1
2. Accessing the DSL Router
Local Con s ole Access
Your user account can be configured with one user login name and different
passwords for accessing a CLI session. The DSL router ships with the local
console enabled. After login, the local console can be disabled.
To disable with the local console, type:
Press Enter after each command that you type.
console disable
save
exit
Entering
you attempt to log in, you will receive an error message.
After saving this change and ending the session, there is no local access
through the console port. Any access must be through a Telnet session or
the NMS.
To deter m ine via a Telnet session whether a console is enabled, enter:
show console
One of the following messages is returned:
—
console enabled
console.
—
console disabled
console.
Changing Access Session Levels
To change the Admin istrator access level, enter:
admin enable
This command provides Administrator access privileges. The router responds
with a prompt to enter the password for Ad ministrator access.
console disable
– Command line management is available at the
– No command line management is av ailable at the
results in NO local access to the DSL router. If
To end the Administrator access level, enter:
admin disable
This command ends the Administrator session. No password is needed.
Entering
page 2-7 for further details on ending a session.
To determine the access lev el fo r a session, refer to
Access Level
2-2
March 20026300-A2-GB20-00
has the same result. Refe r to
exit
on page 2-5.
Exiting from the System
Determining the Current
on
Setting Up the New User's Login
A login prompt appears when the local console connection is first established.
When the login prompt appears, a locally connected console defaults to Console
Enabled, with Operator access.
Procedure
To access the router’s CLI for the first-time:
2. Accessing the DSL Router
1. At the initi al
Login>
prompt, type the default login ID
paradyne
and press
Enter.
2. At the
Password>
prompt (for Operator), type the default password
and press Enter. The login ID and password are validated together when a
login is entered.
3. At the system identity of
CUSTOMER>
prompt, type
admin enable
and press
Enter.
4. At the
abc123
Password>
and press Enter.
System identity changes to the Administrator display mode of
5. Type
configure terminal
prompt (for Administrator), type the default password
CUSTOMER#>
and press Enter.
System identity changes to the Administrator configuration mode of
CUSTOMER - CONFIG#>
.
6. To change or add a new login ID, enter text to replace the default of
paradyne
name
:
your new login ID
NOTE:
Login ID and password are NOT case-sensitive .
abc123
.
7. Enter a new password and specify the level:
password
Example: Type
level passw ord
password operator 238clrd3
Both the login ID and password are 1–31 printa ble alphanumeric ASCII
characters, in the ASCII hex range of 0x21–0x7E. No spaces are allowed.
The following ta ble list s invalid ch aracters.
Invalid CharactersValueASCII Hex Translation
#
$
%
&
6300-A2-GB20-00March 2002
Number sign0x23
Dollar sign0x24
Percentage 0x25
Ampersand0x26
and press Enter.
2-3
2. Accessing the DSL Router
Telnet Access
8. At the prompt, enter the new Administrator-level password to replace
password admin
save
new password
abc123
NOTE:
Any input during an Administrator configuration session must be saved
while still in c on f igu r ati o n mo de.
If denied access during a Telnet session, the session stops and an error is l ogged.
If accessing the router locally and a Telnet session is active, you receive a
Local console disabled by conflict
Telnet access through the management interface in the DSLAM is always enabled
and defaults to Administrator level. For information on accessing the router
through the MCC card in the DSLAM, see the
Communications Controller (MCC) Card, IP Conservative, User's Guide
For the Hotwire 6351 ReachDSL Router, Telnet access from the service domain is
allowed. Telnet Login and a user name and password should be configured if
Telnet access is enabled on the router (the factory default is disable). Up to four
access level/login/password combinations can be configured for the service
domain from which the ReachDSL Router will accept Telnet connections when the
Telnet login feature is enabled.
message.
Hotwire Management
.
:
NOTE:
For network security, Telnet access in the service domain shoul d be disabled
after the the initial remote configuration unless a firewall or some other
security mechanism is used at the subscriber managemen t system. This
ensures that Telnet access to the endpoint is limited to the service provider.
Procedure
To set up Telnet access from the service domain:
1. Type
2. Enable Telnet access form the service domain. Enter:
configure terminal
System identity changes to the Administrator configuration mode of
CUSTOMER - CONFIG#>
telnet enable
save
and press Enter.
.
2-4
March 20026300-A2-GB20-00
2. Accessing the DSL Router
3. To create a login ID and password for a specified access level, enter:
telnet name create
Example: Type
and press Enter.
telnet name create operator 238clrd3 1234
NOTE:
Login ID and password are NOT case-sensitive . See Step 7 on page 2-3
for list of invalid characters.
4. Enable Telnet log in s o tha t the ReachDSL R ou t e r w ill p er form login and
password validation for the Telnet session connection. Enter :
telnet login enable
save
NOTE:
Any input during an Administrator configuration session must be saved
while still in c on f igu r ati o n mo de.
Determining the Current Access Level
The command line prompt displays the access level. The factory default for
System identity is
replace
To deter m ine the comm ands available at the current login access level, enter any
of the following:
help
(question mark)
?
the command, without any parameters
Or, if a System identity of
PARADYNE is entered, the
prompt displays . . .
Then th e D SL rout er
access level is . . .
mode
configur ation mode
6300-A2-GB20-00March 2002
2-5
2. Accessing the DSL Router
Using the List Command
The list command displays a sequence of commands in the form of ASCII strings
that would have the eff ect of setting all c onfiguration settings to the current val ues.
Secure information such as passwords and login IDs are not displayed.
To deter m ine the comm ands available, enter Administrator configuration mode
and type either:
list
Displays the output in on-screen page mode. In on-screen page mode, the
user interface displays 23 lines of information. When the 24th line is reached,
More...
list config
Displays the output in scroll mode as a text file. Scroll mode captures and
displays all command strings in a text file for use with a terminal emulation
program. Refer to Appendix D,
appears. Pressing any key displays the next page.
DSL Router Ter minal E mulation.
Changing the System Identity
The System identity is the same as the MIB entry of sysName. The sysCo n ta ct
and sysLocation MIB entries are not displayed.
Procedure
To change System identity from the factory default of
1. Log in and enter ADMIN-configuration mode.
2. At the
CUSTOMER-CONFIG#>
(no spaces allowed) and press Enter. Then type
system identity
For example:
system identity PARADYNE
save
In this example, after saving the entry and end ing configuration mode, the
System identity will display:
PARADYNE#>
Refer to
Exiting from the System
CUSTOMER>
prompt, type the new System identity
and press Enter.
save
new system identity
on page 2-7 to end configuration mode.
:
2-6
March 20026300-A2-GB20-00
Exiting from the System
You can manually log out of the system, or let the system automatically log you
out. The DSL router will log you out immediately if you disconnect the Console
cable. Any unsaved configuration input will be lost.
Manually Logging Out
2. Accessing the DSL Router
To log out, there are two commands:
logout
and
exit
.
Procedure
To log out of a CLI session:
1. At the > prompt, type
logout
and press Enter.
2. The system ends the session immediately. Any configuration updates must
be saved before exiting or the updates will be lost.
Procedure
To exit the DSL router’s current acce ss level:
1. At the > prompt, type
configuration changes, you will be prompted to save changes before exiting.
2. The
command has the following effect:
exit
I f accessing the DSL router . . . Then . . .
At the Local console and logged in at
the Administrator level, configuration
mode
and press Enter. If there are any unsaved
exit
You are placed at the Operator level. Any
configuration updates must be saved or
they will be lost.
At the Local console and logged in at
the Administrator level,
non-configuration mode
At the Local console and logged in at
the Operator le vel
Via a Telnet session and logged in at
any access level
6300-A2-GB20-00March 2002
You are placed at the Operator level.
exit
The
the Logout command.
Entering either of the following imm ediately
ends the Telnet session:
command responds exactly like
exit
Ctrl + ]
(Control and right bracket k eys)
2-7
2. Accessing the DSL Router
A utom atically Logging Out
The DSL router has an automatic timeout feature that logs you out of the system
after five minutes of inactivity. Unsaved configuration input is lost. The default for
the
autologout
command is enable.
When
autologout
Enabled, the system inactivity timer is enabled.
Disabled, the system inactivity timer is disabled.
To log back in, press Enter at the console to display the
is:
Login>
prompt.
For Telnet access through the service domain for the ReachDSL Router, the Telnet
session is automatically closed after a user-configurable number of minutes. The
default for the
timeout
telnet timeout
command overrides the 5-minute limit enabled by the
command. Also, the
telnet keep-alive
command is 5 (minutes). The
command can be enabled which
telnet
autologout
allows the ReachDSL Router to close the Telnet session if it detects that the
service domain Telnet client has crashed and is down or has rebooted.
2-8
March 20026300-A2-GB20-00
Configuring the DSL Router
DSL Router Configuration Overview
Hotwire DSL Routers support various customer premises distr ibution networks
that contain IP forwarding devices or routers, as well as locally attached hosts
or sub nets. The Hotwire DSL Router’s IP Routing Table contains IP address and
subnet mask information.
The DSL router supports Intern et Protocol, as specified in RFC 791, and Internet
Control Message Protocol (ICMP), as specified in RFCs 792 and 950. It acts as a
router (or gateway), as defined in RFC 791. It also acts as a bridge, bridging all
traffic in the service domain, or routing IP traffic and bridging all other traffic in the
service domain, without affecting traffic in the management domain.
3
For more information on suppor t ed RFCs, refer to
The DSL Router’s Interfaces
Hotwire DSL Routers have two interfaces, the DSL interface and the Ethernet
interface.
DSL Interface
The router’s interface type is determined by its model number:
— Models 6301 and 6302 are Hotwire IDSL Routers.
— Models 6341 and 6342 are Hotwire SDSL Routers.
— Model 6351 is the Hotwire ReachDSL Router.
— Model 6371 is the Hotwire RADSL Router.
The DSL interface has a unique MAC address, assigned before the router is
shipped.
Appendix C, Traps and MIBs.
6300-A2-GB20-00March 2002
3-1
3. Configuring the DSL Router
Ethernet In t e rface
— The Ethernet interface is a 10/100BaseT interface that automatically
negotiates the rate to be used, 10 Mb or 100 Mb. If all Ethernet-attached
devices are capable of operating at 100 Mb, the router defaults to
100 Mb. Otherwise, it operates at 10 M b.
— The interface can be configured for either DIX or IEEE 802.3 frame
format. When configured to use IEEE 802.3 format, SNAP encapsulation
is used, as specified in RFC 1042.
— The interface has a unique MAC address, assigned before the router is
shipped.
— Hotwire 6302 IDSL and 6342 SDSL Routers have a hub configuration
(separate pins for input and output) with four Ethernet connectors. The
hub acts as a bit-level repeater, with the four Ethernet interfaces logically
appearing as one Ethernet communicat ions interface with a single
collision domain.
— In router mode, the router only accepts transmissions on the Ethernet
interface with the interface’s MAC address, or a broadcast or multicast
MAC address.
— In bridge mode, the router accepts all transmissions.
setting.
Interface Identifiers
The following conventions are used for naming router interfaces:
(or d0) – Identifier for the DSL interface.
dsl1
(or e0) – Identifier for the Ethernet interface.
eth1
With exception to primary status, an interface cannot be deleted or changed as
long as there is a declared route that uses the interface.
Service Domain IP Address Assignments
Hotwire DSL Routers support multiple service domains.
Service domains are defined by the configured network addresses and subnet
masks using the CLI.
Up to four service domain IP addr esses and su bnet masks can be assigned to
each DSL (
) or Ethernet (
dsl1
eth1
This is the def ault
) interface.
When a numbered interface is designated as the primary interface, that interface’s
IP address is used as the Router ID. If no interface is designated as the primary
interface, the last numbered interface that was created becomes the Router ID.
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March 20026300-A2-GB20-00
Numbered DSL or Ethernet Interface
In this scenario, the hosts attached to the DSL router’s Ethernet interface are on a
different logical network than the core router. The DSL router is the next hop router
for the hosts. The DSL router’s upstream next hop router is the core router.
Simplified Network Topology
3. Configuring the DSL Router
Core
Router
Hosts can be assigned IP addresses on the network attached to the DSL router’s
Ethernet interface either statically or dynamically using DHCP. The upstream next
hop router is assigned an address on a different logical network than the hosts.
To configure the router’s interfaces using this scenario, you must:
Enable routing on the DSL router.
Assign an IP address to the Ethernet interface, eth1.
Assign an IP address to the DSL interface, dsl1.
Assign an upstream next hop router (not necessary necessary when using
FUNI/MPOA DSL link encapsulation or when the PPPoE client is enabled).
Unnumbered DSL Interface
In this LAN extension application scenario, hosts connected to a corporate
network for virtual office connections or telecommuters want to look like they are
on the same network as the core router. The core router is the next hop router
for the hosts and is on the same logical networ k as the hosts. This is not the
same as enabling Bridging mode.
WAN
DSL
Router
Host
(End Users)
99-16609
To configure the router’s interf a ce s for this scenario, you must:
Enable routing on the DSL router.
Assign an IP address to Ethernet interface (eth1).
Specify the DSL interface (dsl1) as unnumbered.
Assign an upstream next hop router (not necessary necessary when using
FUNI/MPOA DSL link encapsulation or when the PPPoE client is enabled).
Enable Proxy ARP for both the eth1 and dsl1 interfaces (not necessary to
enable Proxy ARP on the dsl1 interfac e when using FUNI/MPOA DSL link
encapsulation or when the PPPoE client is enabled).
6300-A2-GB20-00March 2002
3-3
3. Configuring the DSL Router
IP Routing
Hotwire DSL Routers use destination-based routing for downstream traffic. An IP
Routing Table is maintained to specify how IP datagrams are forwarded
downstream. The DSL Router is capable of supporting static routes configured by
the user. This table can be viewed by both Operator and Administrator access
levels.
The DSL router uses source-based forwarding for upstream traffic to ensure that
packets are forwarded to the upstream router specified for the configured service
domain.
Refer to Chapter 4,
IP Options Processing
The DSL router handles and processes IP datagrams with options set as
described below. No command is available to set IP options.
The router does not process (and drops) any IP datagrams with the following IP
options:
Loose source and record route (type 131)
Strict source and record route (type 133)
Security (type 130)
Stream ID (type 136)
The router does process IP datagrams with the following IP options, but does not
provide its IP address or timestamp information in the response message:
Record route (type 7)
Timestamp (type 68)
DSL Router Configuration Examples,
for further details.
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March 20026300-A2-GB20-00
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