ADTRAN L768 User Manual
Express L768 and Express L1.5
61202192L1-1B
June 1998
HDSL Router/Bridge
USER MANUAL
Express L768 1202192L1
Express L1.5 1202192L2
Trademark:
DMS-100 is a trademark of Northern Telecom, Inc.
Ethernet is a trademark of Digital Equipment Corporation, Intel Corporation, and Xerox Corporation.
ExpertISDN (patent number 5,715,241) is a trademark of ADTRAN, Inc.
Macintosh is a registered trademark of Apple Computer, Inc.
Novell, NetWare, and Internetwork Packet Exchange (IPX) are registered trademarks
of Novell, Inc.
Windows is a registered trademark of Microsoft Corporation.
5ESS is a registered trademark of AT&T.
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
Phone: (256) 963-8000
© 1998 ADTRAN, Inc.
All rights reserved.
Printed in USA.
FCC regulations require that the following information be provided in this manual:
1. If this equipment causes harm to the telephone network, the telephone company
may temporarily discontinue service. If possible, advance notification is given; otherwise, notification is given as soon as possible. The telephone company will advise
the customer of the right to file a complaint with the FCC.
2. The telephone company may make changes in its facilities, equipment, operations,
or procedures that could affect the proper operation of this equipment; advance notification and the opportunity to maintain uninterrupted service are given.
3. If experiencing difficulty with this equipment, please contact ADTRAN (see inside
back cover) for repair and warranty information. The telephone company may require this equipment to be disconnected from the network until the problem is corrected, or it is certain the equipment is not malfunctioning.
4. This unit contains no user serviceable parts.
To ADTRAN service personnel: For continued protection against risk of fire,
replace F1 with the same type and rating of fuse only: .2A, 250 V.
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
or TV reception, which can be determined by turning the equipment off and on. The
user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications to this unit not expressly approved by ADTRAN will void
the user's authority to operate the equipment.
CANADIAN EMISSIONS REQUIREMENTS
This digital apparatus does not exceed the Class A limits for radio noise emissions
from digital apparatus as set out in the interference-causing equipment standard entitled "Digital Apparatus," ICES-003 of the Department of Communications.
Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux
appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur:
"Appareils Numeriques," NMB-003 edictee par le ministre des Communications.
CANADIAN EQUIPMENT LIMITATIONS
Notice: The Canadian Industry and Science Canada label identifies certified equipment. This certification means that the equipment meets certain telecommunications
network protective, operational, and safety requirements. The Department does not
guarantee the equipment will operate to the user’s satisfaction.
Before installing this equipment, ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the company’s inside
wiring associated with a single-line individual service may be extended by means of a
certified connector assembly (telephone extension cord). Compliance with the above
conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user
to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of
the power utility, telephone lines, and internal metallic water pipe system, if present,
are connected together. This precaution may be particularly important in rural areas.
Users should not attempt to make such connections themselves, but should contact the
appropriate electric inspection authority, or an electrician, as appropriate.
The Load Number (LN) assigned to each terminal device denotes the percentage of the
total load to be connected to a telephone loop which is used by the device, to prevent
overloading. The termination on a loop may consist of any combination of devices
subject only to the requirement that the total of the Load Numbers of all devices does
not exceed 100.
Table of Contents
Quick Startup Guide ........................................................................................................ 1
Setting up the HDSL Line ................................................................................................. 1
Chapter 1. Understanding HDSL and the Express L768/L1.5 ................................... 3
HDSL Overview ................................................................................................................. 3
The Express L768/L1.5...................................................................................................... 4
Applications ................................................................................................................. 5
Single User to Corporate LAN .................................................................... 5
Frame Relay Connectivity to ADTRAN Frame Port 768......................... 6
Small Office - Home Office (SOHO) to Corporate LAN.......................... 7
Routing and Bridging with the Express L768/L1.5................................................ 8
Factory Default..................................................................................................... 8
Bridging................................................................................................................. 8
IP Routing ............................................................................................................. 9
IPX Routing........................................................................................................... 9
Concurrent Routing And Bridging ........................................................................... 9
Network Address Translation Mode........................................................................ 9
Front Panel.................................................................................................................... 10
Indicators............................................................................................................... 10
Rear Panel..................................................................................................................... 11
Configuration............................................................................................................... 11
Security.......................................................................................................................... 12
Chapter 2. Installation...................................................................................................... 13
HDSL Network Connection.............................................................................................. 13
T1 Overview................................................................................................................. 13
HDSL Overview........................................................................................................... 13
Local Area Network Connection ..................................................................................... 14
Chapter 3. Terminal Menu Operation and Structure................................................. 15
Terminal Menu Structure.................................................................................................. 15
Configuration............................................................................................................... 15
Status ............................................................................................................................. 17
Test................................................................................................................................. 17
Logs................................................................................................................................ 17
Utilities.......................................................................................................................... 17
Navigating the Terminal Menus...................................................................................... 18
General Layout............................................................................................................. 18
Menu Path..................................................................................................................... 18
Moving Around........................................................................................................... 18
Submenus [+] or [DATA]............................................................................. 18
Activation Field <+>..................................................................................... 18
Editable Data Field........................................................................................ 18
61202192L1-1 Express L768/L1.5 User Manual
i
ii
Table of Contents
Read-Only Field............................................................................................. 18
Navigation with the Keyboard.................................................................... 19
Security Levels ............................................................................................................. 21
Configuration Menu .......................................................................................................... 22
Configuration/System Info........................................................................................ 22
System Name........................................................................................................ 22
System Location ................................................................................................... 22
System Contact..................................................................................................... 23
Firmware Revision............................................................................................... 23
System Uptime ..................................................................................................... 23
Date/Time............................................................................................................. 23
Configuration/WAN .................................................................................................. 24
WAN/HDSL......................................................................................................... 24
HDSL/Mode .................................................................................................. 24
HDSL/Channel Rate..................................................................................... 24
HDSL/NEBEs ................................................................................................ 25
HDSL/FEBEs ................................................................................................. 25
WAN/L2 Protocol ............................................................................................... 25
Configuration/IP......................................................................................................... 26
IP/IP Address....................................................................................................... 26
IP/Subnet Mask ................................................................................................... 26
IP/Default Gateway ............................................................................................ 26
IP/Static Routes ................................................................................................... 27
Static Routes/Active ..................................................................................... 27
Static Routes/IP Address............................................................................. 27
Static Routes/Subnet Mask.......................................................................... 27
Static Routes/Gateway................................................................................. 27
Static Routes/Hops....................................................................................... 27
Static Routes/Private.................................................................................... 27
IP/IP Router ......................................................................................................... 28
IP Router/Mode ............................................................................................ 28
IP/RIP ............................................................................................................. 28
RIP/Mode ................................................................................................ 28
RIP/Protocol............................................................................................ 28
RIP/Method............................................................................................. 28
RIP/Direction .......................................................................................... 29
RIP/V2 Secret .......................................................................................... 29
IP/NAT ................................................................................................................. 29
NAT/DHCP Mode........................................................................................ 29
NAT/DHCP Renewal Time......................................................................... 29
NAT/Web Server .......................................................................................... 29
NAT/Default IP............................................................................................. 30
IP/DNS.................................................................................................................. 30
DNS/Domain Name..................................................................................... 30
DNS/Server 1................................................................................................. 30
DNS/Server 2................................................................................................. 30
IP/UDP Relay....................................................................................................... 31
UDP Relay/Mode.......................................................................................... 31
Express L768/L1.5 User Manual 61202192L1-1
UDP Relay/UDP Relay List......................................................................... 31
UDP Relay List/Relay Address............................................................ 31
UDP Relay List/UDP Port Type........................................................... 31
UDP Relay List/UDP Port 1, UDP Port 2, UDP Port 3 ..................... 31
IP/Proxy ARP ...................................................................................................... 32
Configuration/IPX ...................................................................................................... 33
IPX/Mode ............................................................................................................. 33
IPX/Network........................................................................................................ 33
IPX/Frame Type .................................................................................................. 34
IPX/Seed Status ................................................................................................... 34
IPX/RIP Timer ..................................................................................................... 34
IPX/SAP Timer .................................................................................................... 35
Configuration/Bridge................................................................................................. 36
Bridge/Mode........................................................................................................ 36
Bridge/WAN IP Bridge ...................................................................................... 36
WAN IP Bridge/Network ........................................................................... 37
WAN IP Bridge/Netmask ........................................................................... 37
WAN IP Bridge/Triggered.......................................................................... 37
WAN IP Bridge/Proxy ARP........................................................................ 37
Bridge/WAN IPX Bridge ................................................................................... 37
WAN IPX Bridge/Network......................................................................... 38
WAN IPX Bridge/Frame Type ................................................................... 38
WAN IPX Bridge/Seed Status .................................................................... 38
WAN IPX Bridge/Triggered ....................................................................... 38
Bridge/Spanning Tree ........................................................................................ 38
Spanning Tree/Mode ................................................................................... 38
Spanning Tree/Priority................................................................................ 39
Spanning Tree/Maximum Age................................................................... 39
Spanning Tree/Hello Time.......................................................................... 39
Spanning Tree/Forward Delay................................................................... 39
Spanning Tree/LAN Port ............................................................................ 39
LAN Port/Active ................................................................................... 39
LAN Port/Path Cost .............................................................................. 40
LAN Port/Priority.................................................................................. 40
Spanning Tree/Bridge Group 1 .................................................................. 40
Bridge Group 1/Active.......................................................................... 40
Bridge Group 1/Path Cost..................................................................... 40
Bridge Group 1/Priority........................................................................ 40
Spanning Tree/Bridge Group 2 .................................................................. 40
Bridge Group 2/Active.......................................................................... 40
Bridge Group 2/Path Cost..................................................................... 41
Bridge Group 1/Priority........................................................................ 41
Bridge/Address Table ........................................................................................ 41
Address Table/Aging................................................................................... 41
Address Table/Forward Policy .................................................................. 41
Configuration/Security.............................................................................................. 42
Security/Authentication..................................................................................... 42
Security/Radius Server....................................................................................... 43
Radius Server/Primary Server.................................................................... 43
61202192L1-1 Express L768/L1.5 User Manual
Table of Contents
iii
iv
Table of Contents
Radius Server/Secondary Server................................................................ 43
Radius Server/UDP Port.............................................................................. 43
Radius Server/Secret .................................................................................... 43
Radius Server/Retry Count......................................................................... 43
Security/PPP ........................................................................................................ 44
Security/Filter Defines........................................................................................ 44
Filter Defines /MAC Filter Defines ............................................................ 45
Filter Defines /Pattern Filter Defines......................................................... 45
Filter Defines /IP Filter Defines .................................................................. 46
Filter Defines /IPX Filter Defines................................................................ 47
Configuration/Frame Relay....................................................................................... 48
Frame Relay/Maintenance Protocol ................................................................. 49
Frame Relay/Polling Frequency........................................................................ 49
Frame Relay/DLCI Mapping............................................................................. 49
DLCI Mapping/Active................................................................................. 50
DLCI Mapping/DLCI................................................................................... 50
DLCI Mapping/IP Map................................................................................ 50
Map/Active ............................................................................................. 50
Map/IARP ............................................................................................... 51
Map/Far-End IP Address...................................................................... 51
Map/IP Netmask .................................................................................... 51
Map/Link IP Address ............................................................................ 51
Map/RIP Protocol................................................................................... 51
Map/RIP Method.................................................................................... 52
Map/RIP Direction................................................................................. 52
IP Map/NAT ........................................................................................... 52
DLCI Mapping/IPX Map............................................................................. 52
IPX Map/Active...................................................................................... 52
IPX Map/IARP........................................................................................ 53
IPX Map/Link Network......................................................................... 53
DLCI Mapping/Bridge Map........................................................................ 53
Bridge Map/Active................................................................................. 53
Bridge Map/Bridge Group.................................................................... 53
DLCI Mapping/Filters ................................................................................. 54
Filters/In from PVC................................................................................ 54
Filters/In Exceptions .............................................................................. 54
Filters/Out to PVC.................................................................................. 55
Filters/Out Exceptions........................................................................... 55
Configuration/PPP Profile......................................................................................... 56
PPP Profile/Authentication ............................................................................... 56
Authentication/Tx Method ......................................................................... 57
Authentication/Tx Username ..................................................................... 57
Authentication/Tx Password...................................................................... 57
Authentication/Rx Username..................................................................... 57
Authentication/Rx Password...................................................................... 57
PPP Profile/IP ...................................................................................................... 58
IP/Mode ......................................................................................................... 58
IP/NAT........................................................................................................... 58
Express L768/L1.5 User Manual 61202192L1-1
Table of Contents
IP/Route......................................................................................................... 58
Route/IP/Net.......................................................................................... 58
Route/Netmask ...................................................................................... 58
Route/Force IP........................................................................................ 59
IP/RIP ............................................................................................................. 59
RIP/Mode ................................................................................................ 59
RIP/Protocol............................................................................................ 59
RIP/Method............................................................................................. 59
RIP/Direction.......................................................................................... 59
RIP/Triggered......................................................................................... 60
PPP Profile/IPX ................................................................................................... 60
IPX/Mode....................................................................................................... 60
IPX/Remote Network .................................................................................. 60
IPX/Triggered ............................................................................................... 60
IPX/Type 20 Packets..................................................................................... 60
PPP Profile/Bridge .............................................................................................. 61
Bridge/Mode ................................................................................................. 61
PPP Profile/PPP................................................................................................... 61
PPP/VJ Compression ................................................................................... 61
PPP/Max Config ........................................................................................... 62
PPP/Max Timer............................................................................................. 62
PPP/Max Failure........................................................................................... 62
PPP Profile/Filters............................................................................................... 62
Filters/WAN-to-LAN (In) ........................................................................... 62
Filters/In Exceptions .................................................................................... 63
Filters/LAN-to-WAN (Out) ........................................................................ 64
Filters/Out Exceptions ................................................................................. 64
Configuration/Management ..................................................................................... 65
Management/Telnet ........................................................................................... 65
Telnet/Server Access.................................................................................... 65
Telnet/User List ............................................................................................ 66
User List/Name ...................................................................................... 66
User List/Authen Method..................................................................... 66
User List/Password................................................................................ 66
User List/Idle Time ................................................................................ 66
User List/Level ....................................................................................... 66
Management/SNMP........................................................................................... 67
SNMP Access ................................................................................................. 67
SNMP/Communities.................................................................................... 67
Communities/Name ............................................................................. 67
Communities/Privilege ......................................................................... 67
Communities/Manager IP .................................................................... 67
SNMP/Traps.................................................................................................. 68
Traps/Manager Name ........................................................................... 68
Traps/Manager IP .................................................................................. 68
Management/Maint Port ................................................................................... 68
Maint Port/Password Protect ..................................................................... 68
Maint Port/Password................................................................................... 68
61202192L1-1 Express L768/L1.5 User Manual
v
vi
Table of Contents
Maint Port/Baud Rate .................................................................................. 68
Maint Port/Data Bits .................................................................................... 69
Maint Port/Parity.......................................................................................... 69
Maint Port/Stop Bits..................................................................................... 69
Configuration/Terminal Mode ................................................................................. 69
Status Menu......................................................................................................................... 70
Status/Sessions ............................................................................................................ 71
Sessions/PPP Session.......................................................................................... 71
Sessions/DLCI Table........................................................................................... 72
Sessions/Spanning Tree...................................................................................... 73
Status/ARP Cache....................................................................................................... 73
Status/Bridge Table .................................................................................................... 74
Status/IP Routes.......................................................................................................... 74
Status/IPX Routes ....................................................................................................... 75
Status/IPX Servers....................................................................................................... 75
Status/WAN Stats ....................................................................................................... 76
Status/LAN Stats......................................................................................................... 76
Status/IP Stats.............................................................................................................. 77
Test Menu ............................................................................................................................ 78
Test Menu/Echo Request ........................................................................................... 78
Test Menu/2047 Loopback......................................................................................... 78
Logs Menu........................................................................................................................... 79
Logs/Sys log Host ....................................................................................................... 79
Logs/PPP Log .............................................................................................................. 79
PPP Log/Active ................................................................................................... 80
PPP Log/Wrap..................................................................................................... 80
PPP Log/Level ..................................................................................................... 80
PPP Log/View...................................................................................................... 80
PPP Log/Clear ..................................................................................................... 80
Logs/Connection Log................................................................................................. 80
Connection Log/Active ...................................................................................... 80
Connection Log/Wrap........................................................................................ 81
Connection Log/Level ........................................................................................ 81
Connection Log/View......................................................................................... 81
Connection Log/Clear ........................................................................................ 81
Logs/Network Log...................................................................................................... 81
Network Log/Active........................................................................................... 81
Network Log/Wrap ............................................................................................ 81
Network Log/Level............................................................................................. 82
Network Log/View............................................................................................. 82
Network Log/Clear............................................................................................. 82
Utilities Menu ..................................................................................................................... 83
Utilities/Ping................................................................................................................ 83
Utilities/Telnet Client................................................................................................. 84
Utilities/Upgrade Menu............................................................................................. 84
Upgrade/Transfer Method................................................................................. 84
Upgrade/TFTP Host ........................................................................................... 84
Upgrade/Filename .............................................................................................. 84
Express L768/L1.5 User Manual 61202192L1-1
Table of Contents
Upgrade/Status ................................................................................................... 84
Upgrade/Start Transfer...................................................................................... 85
Upgrade/Abort Transfer.................................................................................... 85
Upgrade/TFTP Server ........................................................................................ 85
Utilities/Exit................................................................................................................. 85
Chapter 4. Specification ................................................................................................... 87
Specifications and Features............................................................................................... 87
Network Interface ......................................................................................... 87
Ethernet Interface (LAN).............................................................................. 87
Display............................................................................................................ 87
Environmental ............................................................................................... 87
Physical........................................................................................................... 87
Power .............................................................................................................. 87
Appendix A. Loop Status Messages .............................................................................. 89
Appendix B. Log Messages ............................................................................................. 91
Appendix C. SNMP .......................................................................................................... 99
Appendix D. Connector Pinouts .................................................................................... 103
Appendix E. Terminal Mode Commands..................................................................... 105
Glossary .............................................................................................................................. 109
Acronyms ............................................................................................................................ 119
Index .................................................................................................................................... 121
61202192L1-1 Express L768/L1.5 User Manual
vii
Table of Contents
viii
Express L768/L1.5 User Manual 61202192L1-1
List of Figures
Figure 1-1: Express L768/L1.5................................................................................. 4
Figure 1-2: Single User to Corporate LAN ............................................................ 5
Figure 1-3: Frame Relay Connectivity to ADTRAN Frame Port 768................. 6
Figure 1-4: SOHO to Corporate LAN..................................................................... 7
Figure 1-5: Express L768/L1.5 Front Panels.......................................................... 10
Figure 1-6: Express L768/L1.5 Rear Panel............................................................. 11
Figure 3-1: Top Level Terminal Menu.................................................................... 16
Figure 3-2: Configuration/System Info Screen..................................................... 22
Figure 3-3: Configuration/WAN Screen ............................................................... 24
Figure 3-4: Configuration/IP Screen ...................................................................... 26
Figure 3-5: Configuration/IPX Screen ................................................................... 33
Figure 3-6: Configuration/Bridge Screen .............................................................. 36
Figure 3-7: Configuration/Security Screen ........................................................... 42
Figure 3-8: Configuration/Frame Relay Screen.................................................... 48
Figure 3-9: Configuration/PPP Profile Screen...................................................... 56
Figure 3-10: Configuration/Management Screen................................................... 65
Figure 3-11: Status Screen........................................................................................... 70
Figure 3-12: Test Screen.............................................................................................. 78
Figure 3-13: Logs Screen............................................................................................. 79
Figure 3-14: Utilities Screen ....................................................................................... 83
61202192L1-1 Express L768/L1.5 User Manual
ix
List of Figures
x
Express L768/L1.5 User Manual 61202192L1-1
List of Tables
Table D-A: IBM/AT Style EIA-232 Interface...................................................... 103
Table D-B: RJ-45 HDSL BRI U .............................................................................. 103
Table D-C: 10BaseT Ethernet ................................................................................ 104
61202192L1-1 Express L768/L1.5 User Manual
xi
List of Tables
xii
Express L768/L1.5 User Manual 61202192L1-1
SETTING UP THE HDSL LINE
Quick Startup Guide
The Express L768/L1.5 works over leased or “dry” copper provided by the local telephone company. See Chapter 4 on page 87 for specifications on maximum distance. If the Express L768/L1.5 is to be used in a back-to-back
configuration, the line mode must be different for each unit.
1. Connect a VT 100 async terminal, or personal computer with a terminal
emulator running 9600 N-8-1, to the
2. Hold down the Control key and press R ; then press Enter to display the
top menu.
3. Using the arrow keys and Enter key to navigate the menu, go to the Con-
figuration/WAN/HDSL menu. Enter the line mode as HTU-C or HTU-R.
Each end of an HDSL circuit must be of opposite modes.
4. Set the rate of transfer that will be used. Both devices must be set at the
same rate.
5. Use the left arrow key or the Escape key to go back up the menu tree.
When asked to save HDSL parameters, type y .
6. Connect the HDSL line to the RJ-45 jack labeled HDSL on the rear panel.
See Appendix D on page 103 for connector pinouts.
7. When the Loop LED(s) remain solid, the Express L768/L1.5 is in synchronization.
8. On the Express L768, the Link LED will illuminate to indicate that PPP has
successfully negotiated.
MAINTENANCE port.
61202192L1-1 Express L768/L1.5 User Manual
1
Quick Startup Guide
2
Express L768/L1.5 User Manual 61202192L1-1
HDSL OVERVIEW
High Bit Rate Digital Subscriber Line (HDSL) is rapidly becoming the service
providers’ technology of choice for the deployment of T1 services: according
to recent estimates, over 60% of today’s T1 installations use HDSL technology.
Instead of traditional methods requiring multiple T1 repeaters, HDSL allows
the telephone companies to quickly deploy a T1 circuit over Carrier Serving
Area (CSA) loops (9,000 feet on 26 AWG wire or 12,000 feet on 24 AWG wire)
without the need for loop conditioning or repeater installation. The benefits
HDSL offers over traditional T1 span lines represent large cost savings for the
service provider because
Chapter 1
Understanding HDSL and
the Express L768/L1.5
• HDSL circuits can be deployed in days as opposed to weeks
• HDSL circuits can be deployed without the need for
- line repeaters on CSA loops
- binder group separation
- bridge tap removal for bridge taps totaling less than
2,500 feet (no single bridge tap greater than 2,000 feet)
• HDSL circuits virtually eliminate cross talk and loop impairment problems
• Safer class A3 voltages eliminate need for special training or procedures.
Adtran provides a full line of HDSL products that are the price/performance
leaders in the industry.
61202192L1-1 Express L768/L1.5 User Manual
3
4
Chapter 1: Understanding HDSL and the Express L768/L1.5
THE EXPRESS L768/L1.5
The Express L768/L1.5 is a standalone device that links two Local Area Networks (LANs) using a high-speed DSL two-wire or four-wire line. The Express
L768 has a two-wire interface and operates up to 768 kbits per second. The Express L1.5 has a four-wire interface and operates up to 1.536 Mbits per second.
The Express L1.5 is compatible with the Express L768 in a two-wire mode if
the rate is 768K and below.
See Figure 1-1 for an illustration of the Express L768/L1.5. The 10BaseT connector operates at 10 Mbits per second half duplex and accepts standard ethernet packets encapsulated using IEEE 802.3 or Ethernet II (DIX). Because the
10BaseT is a four-wire interface, a crossover switch permits the user to connect
to either a hub-concentrator or network interface card without the need for
special cabling. The maintenance port can connect to any asynchronous terminal emulating a VT 100 terminal for configuration.
TX/RX LOOP LINK PWR
EXPRESS L768
LI
TEST
LINE
L768
TX/RX LOOP1 LOOP2 PWR
EXPRESS L1.5
LI
TEST
LINE
L1.5
Figure 1-1
Express L768/L1.5
Express L768/L1.5 User Manual 61202192L1-1
Applications
Single User to Corporate LAN
• Telecommuter/Home Office Access to the corporate LAN
• Single device access
• User Datagram Protocol (UDP) broadcasts are “relayed” to corporate LAN.
• Client device can obtain the Internet Protocol (IP) address dynamically using Dynamic Host Configuration Protocol (DHCP).
• Compatible with popular central site LAN access devices
Chapter 1: Understanding HDSL and the Express L768/L1.5
Up to 8 kft
TO
HUBTONIC
1
O
EIA23210 BASE TPOWER
SDSL
OFF
ON
1234
RD B1 B2 PWR
TD
EXPRESS L1.5
LINE
TEST
Express L768/L1.5
10 BT
10 BT
Single User to Corporate LAN
61202192L1-1 Express L768/L1.5 User Manual
Server
Figure 1-2
5
Chapter 1: Understanding HDSL and the Express L768/L1.5
Frame Relay Connectivity to ADTRAN Frame Port 768
• Telecommuter/Home Office Access to the corporate LAN
• Access to any other router within the Frame Relay Network
• User Datagram Protocol (UDP) broadcasts are “relayed” to corporate
LAN
• FramePort 768 (part no. 1100048L1) provides concentration of up to 24
SDSL interfaces into a single DS-1
LAN
6
FRAME
RELAY
Frame Relay Connectivity to ADTRAN Frame Port 768
PCPC
Figure 1-3
Express L768/L1.5 User Manual 61202192L1-1
Chapter 1: Understanding HDSL and the Express L768/L1.5
Small Office - Home Office (SOHO) to Corporate LAN
• Connects the small office or home office to the corporate LAN
• Routes IP and Internet Packet Exchange (IPX) traffic from multiple devices
to the corporate LAN
• Bridges all non-routed traffic (e.g., AppleTalk)
• Low cost alternative to buying a high-end router
• Compatible with popular central site LAN access devices
Up to 8 kft
1
O
10 BT
TO
HUBTONIC
Hub
OFF
ON
EIA23210 BASE TPOWER
SDSL
1 2 3 4
EXPRESS L1.5
RD B1 B2 PWR
TD
TEST
L768/L1.5
Server
Figure 1-4
SOHO to Corporate LAN
The Express L768/L1.5 provides the following basic functions:
1.
LAN Bridge: Bridging provides a point-to-point connection between two
LANs. The bridge learning function scans the source and destination media access control (MAC) addresses of all packets on its local LAN and determines which packets should be transmitted over the HDSL link.
Applications include connectivity between single user or small offices to
corporate LANs. The Express L768/L1.5 uses the Spanning Tree Algorithm (IEEE 802.1d-ISO/IEC10038), which provides a loop-free topology
and redundancy.
LINE
61202192L1-1 Express L768/L1.5 User Manual
7
Chapter 1: Understanding HDSL and the Express L768/L1.5
2. IP Router: The Express L768/L1.5 can function as an IP router using the
Routing Information Protocol (RIP) for advertising and learning routes
among other routers. Static routes may also be entered into the routing table.
3. IPX Router: IPX routers and services can be exchanged between the Express L768/L1.5 and other devices using RIP and Service Advertising Protocol (SAP). Watch dog serialization filtering and spoofing can permit the
ISDN to be idle during no application traffic periods.
Network Address Translation (NAT): Single networks can connect to the
4.
Internet with this function. The Express L768/L1.5 translates outgoing IP
packets over the HDSL to the IP router at the Internet Service Provider.
Many popular Internet applications are supported.
8
5. PPP or Frame Relay: The layer two protocol used to transfer packets can
be PPP or Frame Relay (RFC 1490). PPP allows a point-to-point connection, whereas Frame Relay can provide up to ten permanent virtual circuits.
Routing and Bridging with the Express L768/L1.5
The Express L768/L1.5 is a Router and Transparent Learning Bridge. Its features can be easily configured and used once several basic concepts are understood.
Factory Default
The Express L768/L1.5 comes from the factory configured for MAC Bridging,
IP routing and IPX routing with no filters or connection information defined.
An IP address of 10.0.0.1 with a network mask of 255.255.255.0 is preloaded.
The factory default layer two configuration is PPP, which provides the least
amount of reconfiguration due to its negotiation-oriented nature.
Bridging
In Bridge Mode, the Express L768/L1.5 can be used to connect two LAN segments. In this mode, all protocols are supported because they are transported
across the HDSL link at the MAC layer. The Spanning Tree Algorithm can be
used to guarantee a loop-free topology. MAC addresses are “learned” by each
Express L768/L1.5 to prevent non-WAN packets from being bridged.
Express L768/L1.5 User Manual 61202192L1-1
IP Routing
Chapter 1: Understanding HDSL and the Express L768/L1.5
The Express L768/L1.5 operates as an IP router when the
Router/Mode option is configured to On . In PPP mode, the Express L768/L1.5
uses an IP unnumbered WAN interface; the IP address and mask assigned to
the unit’s LAN interface apply to all routing and IP operations for the unit. In
Frame Relay mode, each PVC can be specified as numbered or unnumbered
links. If a default gateway is specified on the network of the Ethernet interface,
the unit attempts to reach the gateway through that interface. If no default
gateway is specified (i.e., 0.0.0.0) the WAN interface becomes the default gateway (recommended for remote applications when there are no other routers
on the remote LAN).
IPX Routing
Network routes and services are learned and advertised using Novell’s RIP
and SAP.
Concurrent Routing And Bridging
The Express L768/L1.5 can route IP and IPX as well as bridge non-IP/IPX
packets simultaneously. The PPP profile will by default negotiate PPP network protocols to support the transmission and reception of IP, IPX, and
Bridge packets. If the PPP peer does not accept a protocol, the Express L768/
L1.5 will fall back to any combination of routing and bridging.
Network Address Translation Mode
Configuration/IP/IP
NAT is a special mode of operation in which the Express L768/L1.5 obtains a
dynamically assigned IP address from the peer router (typically an Internet
Service Provider). This allows a network of computers to appear as a single IP
address.
NAT is enabled if the layer two protocol is PPP and the PPP profile has the IP
parameter
NAT set to Yes , or the layer two protocol is Frame Relay and a
DLCI mapping has the IP Map/Nat parameter set to Yes . The network computer’s IP stack may use DHCP to request an IP address, default gateway address, and domain name server addresses from the Express L768/L1.5.
61202192L1-1 Express L768/L1.5 User Manual
9
Chapter 1: Understanding HDSL and the Express L768/L1.5
Front Panel
Figure 1-5 shows the front panel of the Express L768/L1.5. The indicators are
divided into LAN functions, WAN functions, and Test functions.
Indicators
TX/RX Flashes when transmitting and receiving data on the
10BaseT connector.
LI Link integrity. Illuminates when there is a good
connection between the Express L768/L1.5 and the
Hub/NIC card.
LOOP/LOOP1 Flashes when loop 1 (pins 1 and 2 on RJ-45) is not
in sync. Solid when loop 1 is in sync.
LINK/LOOP2 On Express L768: Illuminates when either PPP or
Frame Relay has an active connection.
On Express L1.5: Flashes when loop 2 (pins 4 and
5 on RJ-45) is not in sync. Solid when loop 2 is in sync.
10
TX/RX LOOP LINK PWR
EXPRESS L768
LI
TEST
LINE
L768
TX/RX LOOP1 LOOP2 PWR
EXPRESS L1.5
LI
TEST
LINE
L1.5
Figure 1-5
Express L768/L1.5 Front Panels
Express L768/L1.5 User Manual 61202192L1-1
Rear Panel
The Express L768/L1.5 has one RJ-45 jack, labeled HDSL, on the rear panel for
network connection (see Figure 1-6). There are two sets of switches on the back
panel. The TO HUB/TO NIC switch allows the Express L768/L1.5 to connect
directly to a Network Interface Card (NIC) or a HUB without the need for special cabling. The OFF/ON switch block is for factory default and firmware
downloading. With switch 1 in the up or OFF position, the Express L768/L1.5
will immediately go into a download mode when power is enabled. Switch 1
must be in the down or ON position in order to boot up normally. Switch 2 in
the up or OFF position will force the entire configuration to be factory defaulted.
The Express L768 transfers data up to 768 kbps over a two-wire facility. The
Express L1.5 transfers data up to 1.536 Mbps over a four-wire facility. This
type of service is a permanent connection between endpoints or between the
unit and the Frame Relay cloud. It is sometimes referred to as a leased connection, a dedicated connection, a nailed-up connection, or a private circuit.
Leased connection or leased line is used in this manual to represent these types
of services.
Chapter 1: Understanding HDSL and the Express L768/L1.5
1202192L1/1202192L2
TO
1
O
HUBTONIC
OFF
ON
EIA23210 BASE TPOWER
1234
Express L768/L1.5 Rear Panel
HDSL
Figure 1-6
Configuration
The Express L768/L1.5 is configured using a menu-based interface. This interface can be accessed via the maintenance port using any asynchronous
VT 100 terminal or personal computer running a terminal emulation program,
or via the LAN using a Telnet client program. To use the Telnet interface, the
Express L768/L1.5 must first have an IP address programmed into it via the
maintenance port. The factory default is 10.0.0.1.
61202192L1-1 Express L768/L1.5 User Manual 11
Chapter 1: Understanding HDSL and the Express L768/L1.5
Security
Security on network devices is a major concern for almost anyone with a network. The Express L768/L1.5 provides many tools for securing the local network from hostile users. Connections can be authenticated using passwords.
A RADIUS client can also be used.
The Telnet configuration can also be protected using the same authentication
methods. Each menu item in the Express L768/L1.5 has a security level associated with it. A telnet session is assigned a privilege level which determines
which menu items are accessible to the telnet client. See Security Levels on
page 21 (in Chapter 3) for more information on menu security levels.
Filters can be defined to prevent certain addresses or protocols from being
transferred from LAN-to-WAN, WAN-to-LAN, or WAN-to-WAN.
12 Express L768/L1.5 User Manual 61202192L1-1
After unpacking the unit, immediately inspect it for possible shipping damage. If damage is discovered, file a claim immediately with the shipping carrier; then contact the ADTRAN Customer and Product Service (CAPS)
department (see inside back cover for information).
HDSL NETWORK CONNECTION
T1 Overview
The T1 digital communications link has been used by telephone companies
(telcos) for transmitting voice since the early sixties. The D4 channel bank is a
T1 digital carrier system that was introduced in the mid-seventies and is still
widely used by telcos. Communication demands of businesses continued to
grow to the point that the telcos began offering T1 service directly to the public. D4 channel banks began to be used for T1 in corporate network topographies for voice. The advances in computer development also created a
demand for T1 data communication which now is a large part of the T1 traffic.
Chapter 2
Installation
T1 is a digital service that is delivered to the user over two pairs of wires from
the service provider. The signal operates at 1.544 Mbps and is usually extended by repeaters that are installed about every mile after the first 6000 feet. The
T1 signal is divided into 24 time slots (DS0s) which operate at 64 kbps. Each
time slot is occupied by digitized voice or by data.
HDSL Overview
T1 service traditionally has been delivered from the service provider with an
office repeater over metallic facilities with an alternate mark inversion (AMI)
scheme. If the customer is beyond 3000 feet, a T1 loop repeater is used with additional repeaters spaced at 6000 feet.
61202192L1-1 Express L768/L1.5 User Manual 13
Chapter 2: Installation
A new technology has been developed for the telcos for delivery of T1 service.
The technology is known as high-bit-rate digital subscriber line (HDSL).
HDSL employs a 2B1Q modulation technique across the same types of pairs
traditionally encountered with metallic T1 delivery systems. HDSL satisfies
the telco distance requirements without the use of repeaters.
LOCAL AREA NETWORK CONNECTION
The Express L768/L1.5 has a 10BaseT connector that provides half-duplex 10
Mbps operation over a four-wire twisted pair. Place the switch in the TO HUB
position when connecting to a 10BaseT concentrator or Hub. Place the switch
in the TO NIC position when connecting directly to a computer’s 10BaseT network interface card.
Other types of ethernet interfaces (i.e., AUI, 10Base2, etc.) can be accommodated by obtaining an appropriate converter.
14 Express L768/L1.5 User Manual 61202192L1-1
Loading...