Nokia MW1122 User Manual
Nokia MW1122
ADSL/WLAN Routerā
T66520
ADMINISTRATOR MANUAL
MW1122
ADSL/WLAN Router
Administrator Manual
C33902.20 A0
C33902001SE_00
E Copyright Nokia Networks Oy
MW1 122 Administrator Manual
E COPYRIGHT Nokia Networks Oy 2000
All rights reserved.
No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval
system, or translated into any human or computer language without the prior written permission
of Nokia Networks Oy.
The manufacturer has made every effort to ensure that the instructions contained in the
documents are adequate and free of errors and omissions. The manufacturer will, if necessary ,
explain issues which may not be covered by the documents. The manufacturer’s liability for any
errors in the documents is limited to the correction of errors and the aforementioned advisory
services.
The documents have been prepared to be used by professional and properly trained personnel,
and the customer assumes full responsibility when using them.The manufacturer welcomes
customer comments as part of the process of continual development and improvement of the
documentation in the best way possible from the user’s viewpoint. Please submit your comments
to the nearest Nokia sales representative.
NOKIA is a registered trademark of Nokia Corporation.
Any other trademarks mentioned in the documents are the property of their respective owners.
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Document History
Document Date Comment
C33902001SE_00 05.07.2000
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Contents
Chapter 1
Introduction to Nokia MW1122 1-1. . . . . . . . . . . . . . . .
Chapter 2
Applications and features 2-1. . . . . . . . . . . . . . . . . . . . .
2.1 Applications 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internet access 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote work 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAN interconnection 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Features 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Interfaces 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAN and WLAN interfaces 2-6. . . . . . . . . . . . . . . . . . . . . . .
Slaved WLAN operation 2-7. . . . . . . . . . . . . . . . . . . . . . . . .
Internal host/gateway interface 2-7. . . . . . . . . . . . . . . . . . . .
Data VCC operation 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Routing 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.3 Bridging 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.4 Network Address Port Translation 2-8. . . . . . . . . . . . . . . . . . .
2.2.5 Dynamic Host Configuration Protocol 2-10. . . . . . . . . . . . . . . .
2.2.6 ATM and ADSL 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.7 Point-to-Point T unneling Protocol (PPTP) 2-10. . . . . . . . . . . . .
2.2.8 Point-to-Point Protocol over Ethernet (PPPoE) 2-12. . . . . . . . . .
2.2.9 Payload encapsulations 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.10 Access list authorisation 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.11 Wireless LAN and radio interface 2-12. . . . . . . . . . . . . . . . . . . .
2.2.12 Wired Encryption Privacy (WEP) 2-13. . . . . . . . . . . . . . . . . . . .
2.2.13 Weighted Fair Queueing (Class of Service) 2-13. . . . . . . . . . . .
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2.2.14 Management 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.15 Dedicated management channel 2-13. . . . . . . . . . . . . . . . . . . . .
Chapter 3
Interfaces and indicator lights 3-1. . . . . . . . . . . . . . . . .
3.1 Interfaces 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Ethernet interface 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 ADSL interface 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Command line interface 3-3. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Indicator lights 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4
Installing Nokia MW1122 4-1. . . . . . . . . . . . . . . . . . . . .
4.1 MW1 122 default settings 4-1. . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Step-by-step installation procedure 4-2. . . . . . . . . . . . . . . . .
Chapter 5
Managing MW1122 5-1. . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Operational examples 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Routing/tunneling IP only 5-2. . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Routing/tunneling IP, bridging other protocols 5-3. . . . . . . . . .
5.1.3 Routing/tunneling IP, bridging all protocols including IP 5-3. .
5.1.4 Bridging only 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.5 Routing/tunneling IP only using slaved WLAN 5-4. . . . . . . . .
5.2 T ypical configuration tasks 5-5. . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Configuring DHCP and DNS 5-5. . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Configuring static and dynamic routing 5-6. . . . . . . . . . . . . . .
5.2.3 Encrypting wireless connection 5-7. . . . . . . . . . . . . . . . . . . . . .
5.2.4 Changing WLAN settings through the command line interface 5-8
Changing WLAN network name 5-8. . . . . . . . . . . . . . . . . . .
Changing WLAN channel 5-8. . . . . . . . . . . . . . . . . . . . . . . .
Controlling the access to your network 5-9. . . . . . . . . . . . . .
5.2.5 File system and downloading new firmware using TFTP 5-10. .
Downloading configuration or application from monitor 5-11
5.3 Browser management 5-12. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Opening a connection 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Main Page 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Wireless LAN page 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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5.3.4 WLAN Clients page 5-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enabling access control 5-17. . . . . . . . . . . . . . . . . . . . . . . . . .
Encrypting wireless connection 5-18. . . . . . . . . . . . . . . . . . . .
5.3.5 Service Providers pages 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.6 Local Network pages 5-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local ports 5-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHCP 5-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NAPT 5-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Routing page 5-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.7 Statistics page 5-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.8 Restart page 5-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.9 Save Config page 5-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Command line interface (CLI) 5-31. . . . . . . . . . . . . . . . . . . . .
5.4.1 Main mode commands 5-34. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 Configuration mode commands 5-58. . . . . . . . . . . . . . . . . . . . . .
Root level commands 5-59. . . . . . . . . . . . . . . . . . . . . . . . . . .
System level commands 5-60. . . . . . . . . . . . . . . . . . . . . . . . .
Password level command 5-61. . . . . . . . . . . . . . . . . . . . . . . .
Ethernet level commands 5-61. . . . . . . . . . . . . . . . . . . . . . . .
WLAN level commands 5-64. . . . . . . . . . . . . . . . . . . . . . . . .
VCC (ATM channel) commands 5-72. . . . . . . . . . . . . . . . . . .
Vbridge commands 5-77. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dedicated management channel commands 5-78. . . . . . . . . .
Common commands 5-79. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A
Technical specifications A-1. . . . . . . . . . . . . . . . . . . . . . .
A.1 Mechanical construction and power supply A-3. . . . . . . . . .
A.2 Ambient conditions, EMC and safety A-3. . . . . . . . . . . . . . .
Ambient conditions A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary
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Introduction to Nokia MW1122
Chapter 1
Introduction to Nokia MW1122
Nokia MW1122 is an integrated ADSL (Asymmetric Digital
Subscriber Line) bridge and router which enables high-speed Internet
access for your wireless (WLAN) and Ethernet local area networks
(LAN). It multiplies the capacity of the already installed telephone
lines used traditionally for telephone and dial-up modem services.
MW1122 brings high-speed connections available for home users,
small offices and telecommuters.
Figure 1-1 Nokia MW1122
MW1122 allows you to connect your desktop and laptop PCs to
remote networks. Your PCs must be equipped with either 10Base-T
Ethernet interface or IEEE 802.1 1b standard compliant wireless LAN
card, for example Nokia C110 or Nokia C11 1 PC card. There are also
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PCI cards and PC card adapters which can be used with desktop PCs. If
you want to have more than one PC connected to a Nokia MW1122
modem through the Ethernet interface, you must use a multi-port
Ethernet hub in between the PCs and Nokia MW1122 modem.
A wireless network at home or office is a powerful, easy to use network
that is similar to any other Ethernet-like local area network. The only
difference is the lack of cables needed on the traditional LAN. This
enables flexibility and mobility that has not been available before. Y ou
can use your laptop anywhere within the range of your wireless LAN
covering you home or office. Wireless LAN, defined by IEEE 802.1 1b
standard, provides a capacity of 1, 2, 5.5 and 11 Mbit/s capacity and
support for 32 concurrent wireless LAN clients and a coverage of 20 to
50 metres depending on the inner walls of your apartment, house or
office.
The ADSL high-speed Internet access may be delivered to you over
the same copper pair of wires that is used for your traditional telephony
services. As both services utilise the same pair of wires, a filter is
needed to separate them. This is called a POTS filter and it is a small
external device connected between your telephone and the telephone
wall socket.
Your Nokia MW1122 interconnects with a Digital Subscriber Line
Access Multiplexer (DSLAM) installed and maintained by your
access provider in their central office. MW1122 ADSL technology is
based on Discrete Multitone (DMT) modulation allowing a maximum
of 8 Mbit/s data transmission from the network and 800 kbit/s towards
the network. However, these figures illustrate the maximum
performance of the technology and are subjected to the physical line
conditions and the distance from you to the central office. MW1 122 is
capable of adapting to the physical line conditions and guarantees the
maximum transmission rate possible on the particular line. MW1 122
adapts its speed to the line conditions in steps of 32 kbit/s. In addition
to these physical limitations affecting your data throughput, your
Internet Service Provider (ISP) may limit your access according to
their service provisioning policy and based on your service contract.
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Chapter 2
Applications and features
Applications and features
In this chapter, we present the most common applications and features
of MW1122. The use and configuration of your Nokia MW1 122 may
be different from the configurations presented in this manual, even for
similar applications. The configurations presented in this manual
represent a typical way of using MW1122 for the corresponding
applications.
2.1 Applications
The three typical applications discussed below are the Internet access,
remote work, and office LAN interconnection.
Internet access
Your access to the Internet is provided by your Internet Service
Provider (ISP). Nokia MW1 122 connects you through your telephone
line and the ATM (Asynchronous Transfer Mode) network to the
network of your ISP, which, in turn, is connected to the Internet.
Hence, all your data goes through the ISP’s network. If you are using
only one ISP for your Internet access, your ISP may give you a limited
set of IP addresses belonging to its address space that you may utilise
in your desktop and laptop computers on your home network.
However, in many cases it is more practical to separate your own
private LAN from the ISP’s public network by using private IP
addresses. This way you are not limited to the number of public IP
addresses provided by your ISP but you can manage your own address
space independently. For this you will need to use NAPT (Network
Address Port Translation) feature available in your MW1 122 modem.
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This mode of operation reduces the need to have more than one public
Internet address. Furthermore, it prevents others from seeing and
accessing your private network and therefore it acts as a simple
firewall.
Wireless
LAN
Customer
premises
LAN
10Base-T
Wireless
LAN
DSLAM
ATM
network
RAN
Internet
Internet connection
2-2
Figure 2-1 High-speed Internet access
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Applications and features
Remote work
Another application for MW1122 is remote work. In this case the
end-to-end architecture can, for example, use PPP over Ethernet,
where a dial-up-type PPP connection is created between your home PC
and your corporate networks PPP access server based on the user name
and password you issue in your PC. The same set up could be used for
accessing the public Internet with a different user name and password.
This example naturally presumes that your ISP supports this type of
approach for providing remote work services for our company.
Remote
worker 1
DSLAM
10Base-T
ATM
network
Wireless
LAN
Nokia MW1122
Remote
worker 2
Remote
worker 3
PPPoE
RAN L2TP
Company
router
Corporate
network
Figure 2-2 Remote work using MW1122 as a standard router
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LAN interconnection
MW1122 can also be used for corporate branch office LAN
interconnection. Especially, when the branch office is a small and
possibly a temporary site without any existing LAN infrastructure
available, the MW1122 is highly suitable for this purpose. In such
circumstances the wireless LAN is an excellent technology to have
office coverage fast and without any additional wiring installations.
Local file and printer servers, if needed, may be connected with the
10Base-T Ethernet interface to MW1122 and all client PCs and laptops
may be using wireless LAN to access the servers, the printer, and the
corporate intranet. As a bridge, MW1122 enables all network
protocols to be used on the corporate network.
Wireless
LAN
Remote
office 1
Remote
office 2
Remote
office 3
LAN
10Base-T
wireless
LAN
DSLAM
ATM
network
Company
bridge
Corporate
network
Figure 2-3 LAN interconnection
2.2 Features
MW1122 can operate as a bridge and/or Internet Protocol (IP) router
between Ethernet, wireless LAN and the virtual channels of
ADSL/ATM interfaces supporting both dynamic and static routing.
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2.2.1 Interfaces
MW1122 has the following interfaces:
D Ethernet interface (LAN)
D Wireless LAN interface (WLAN)
D 8 ATM VCC interfaces
D ATM VCC management interface
D Gateway/bridge management interface. This interface is used as a
bridge host interface or gateway interface depending on the
operation mode. In this manual it is called VBRIDGE. On the
MW1122 web pages, the interface is called gateway or bridge IP
interface.
MW1122 can operate in four different main modes:
D Bridging only
D Routing/tunneling IP only
D Routing/tunneling IP, bridging all but IP
D Routing/tunneling IP and bridging all, including IP
Applications and features
The mode in which MW1122 operates depends on the configuration of
the unit’s interfaces. Table 2-1 shows the operational modes and the
corresponding interface configurations.
LAN interface WLAN inter-
face
Bridge only
Bridging Bridging or
slaved to LAN
interface (single
subnet).
Route/tunnel IP only
Routing (IP address configured)
Routing (IP address configured) or slaved
to LAN interface
(single subnet).
ATM VCC interfaces
Bridging. Used as a man-
Routing (IP address configured) or PPTP
local tunneling
activated for
each active
ATM VCC.
Vbridge
(gateway/host
interface)
agement (host)
interface for all
bridged interfaces in case
such is needed.
Not used in this
case. The unit
can be managed through
any of the LAN,
WLAN or ATM
interface IP addresses.
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LAN interface Vbridge
Routing (IP address configured) and
bridging activated.
WLAN interface
Route/tunnel IP, bridge all other traffic
Routing (IP address configured) and
bridging activated or slaved
to LAN interface
(single subnet).
ATM VCC interfaces
VCCs that only
route or tunnel
have routing (IP
address configured) or PPTP
local tunneling
activated.
VCCs that both
bridge and
route have additionally bridging
activated. This
requires ETHLLC encapsulation to be used
on those VCCs.
VCCs that only
bridge have
only bridging
activated.
(gateway/host
interface)
Typically not
used in this
case. The unit
can be managed locally
through LAN
and WLAN interfaces and remotely through
a separate
management
VCC or the ATM
VCCs which
have routing
activated.
Route/tunnel IP, bridge all other including IP
Bridging activated
Bridging activated or slaved
to LAN interface
(single subnet).
VCCs that only
route or tunnel
have routing (IP
address configured) or PPTP
local tunneling
activated.
VCCs that only
bridge have
only bridging
activated.
Used as a common IP gateway
interface for
both LAN and
WLAN interfaces.
Table 2-1 Operational modes
LAN and WLAN interfaces
LAN and WLAN interfaces can be configured individually to bridge
and route packets. There are three different operational modes in both
LAN and WLAN interfaces:
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Applications and features
D Bridging only; only bridging is activated in the interface. In this
case the interface bridges all protocols.
D Routing only; only IP address is configured in the interface. In this
case, the interface routes IP packets.
D Bridging and routing; Bridging is activated in the interface and IP
address is configured in the interface. In this case, the interface
routes IP packets and bridges all other packets.
Slaved WLAN operation
The wireless LAN interface can be configured to operate as a slave to
the Ethernet interface. In this case, there is no need to configure the IP
address or bridging to the wireless LAN interface. The Ethernet and
the wireless LAN interface are bridged together internally and both
interfaces are treated as a single LAN interface. All LAN
configuration parameters defining bridging and IP-related parameters,
such as IP address, admin-disabled and RIP configuration address, are
used for both LAN and WLAN interfaces.
Internal host/gateway interface
There is a special host/gateway logical IP interface within MW1122
called VBRIDGE. This interface has a specific purpose in MW1122.
In applications where some A TM virtual channel connections are used
for bridging IP traffic and some other ATM virtual channel
connections are used for routing IP traffic, the VBRIDGE interface
must be used instead of LAN/WLAN IP addresses. Alternatively , this
interface is used in bridge only application when the IP address is
required for remote management purposes.
Data VCC operation
MW1122 supports the following encapsulations in each ATM data
virtual channel individually:
D RFC2684 LLC encapsulation for bridged IP (ETH-LLC)
D RFC2684 LLC encapsulation for routed IP (IP-LLC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 (PPP-VC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 used to
tunnel LAN/WLAN/VBRIDGE PPTP packets
(TUNNELED-PPP-VC)
If an IP address is given to a virtual channel interface and bridging is
enabled at that interface, then IP data at that interface is routed and all
other protocols are bridged. The only encapsulation which allows both
bridging and routing simultaneously is ETH-LLC. For example, it is
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possible to route ETH-LLC encapsulated packets and at the same time
bridge, for example, PPPoE packets (PPPoE packets are transported
directly over Ethernet frame, not within IP packets).
2.2.2 Routing
Routing is based on routing entries in a routing table. Static routes are
added via the management interface and dynamic routing is done using
RIP and RIPv2. Routing is done between the Ethernet 10Base-T
interface, the wireless LAN interface and the virtual channel
connection (VCC) of the A TM/ADSL interface. MW1122 supports up
to 8 simultaneous VCCs.
MW1122 supports IGMP (Internet Group Management Protocol)
proxy receive function for IP multicast applications.
2.2.3 Bridging
Bridging is supported to provide full protocol transparency. Bridging
can be used simultaneously with IP routing. MW1122 works as a
self-learning bridge supporting up to 1024 MAC addresses. Bridging
is done between the Ethernet 10Base-T interface, the wireless LAN
interface and each ATM VCC interface. Optionally, the bridging
between the VCCs can be disabled.
2.2.4 Network Address Port Translation
MW1122 supports Network Address Port Translation (NAPT) for
TCP/IP , UDP/IP and ICMP/IP protocols. When NAPT is used, a single
IP address is allocated to a VCC which leads to the public IP network.
The Ethernet subnet has private IP addressing and is not visible to the
VCC. NAPT translates the IP source address and source port number
dynamically to the VCC IP address and port number. Similarly,
packets coming from the VCC are mapped back to the original
destination addresses. NAPT allows up to hundreds of hosts to share a
single VCC IP address to the public network. The principle of Network
Address Port Translation is presented in Figure 2-4.
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Applications and features
Home network (LAN) Internet (WAN)
src:192.168.1.112:1228
dst:194.112.11.111:80
src:194.112.11.111:80
dst:192.168.1.112:1228
NAPT router
192.168.1.254
src:195.112.12.161:50001
dst:194.112.11.111:80
src:194.112.11.111:80
dst:195.112.12.161:50001
195.112.12.161
Figure 2-4 Principle of Network Address Port Translation
NAPT may restrict the operation of some IP applications. NAPT also
operates as a simple IP firewall because translation is only allowed
when the first packet is transmitted from the LAN. This means that the
NAPT table entry is created only when a packet is sent from the home
network to the Internet. With server support capability, the user can
add static entries to the NAPT table allowing the translation always in
both directions. This capability is used to add servers (HTTP, NNTP,
and FTP), which are visible to the public IP network via the VCC, on
the LAN subnet.
NAPT supports most IP-based protocols. Because NAPT operates on
the IP and transport layer , the application that includes IP address and
port within the payload will not work properly through NAPT . In many
cases, these applications can be passed through the NAPT using
Application Layer Gateway functionality (ALG). MW1 122 has ALG
for the following protocols/applications:
D ICMP
D FTP
D H.323 including NetMeeting
D CUSeeMe
D PPTP
D IRC
D IPSEC ESP tunnel mode and IKE
Note, that most IPSEC implementations will fail when passed through
NAPT. A typical reason is that the identification may fail if the
identification is based on IP address. Also, only tunnel mode without
Authentication Header (AH) works.
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2.2.5 Dynamic Host Configuration Protocol
MW1122 can act as a Dynamic Host Configuration Protocol (DHCP)
server for the PCs on the end-user home network. In this mode,
MW1122 can assign up to 253+253 consecutive addresses from two
separate address ranges (that is, 253 consecutive addresses per address
range) to the PCs on the home network. Two separate address ranges
are used when LAN and WLAN are operating as separate subnets.
MW1122 can also act as a DHCP relay agent and relay the DHCP
requests to an external DHCP server.
2.2.6 ATM and ADSL
MW1122 supports up to 8 simultaneous VCCs and supports UBR
(Unspecified bit rate) traffic shaping on all VCCs. The maximum
transmit rate on each VCC is the ADSL upstream capacity. If more
than one VCC is transmitting simultaneously, the ADSL upstream
capacity is temporarily shared between these VCCs. When one VCC is
idle, the bandwidth is used by another VCC.
The ADSL transmission is based on the DMT line code. MW1122
provides a DMT line rate up to 8 Mbit/s downstream and up to 800
kbit/s upstream. The DMT transceiver is rate adaptive and capable of
providing faster rates over short distances or slower rates over long
distances. The transceiver adapts itself to the line conditions.
MW1122 supports also ADSL Lite. In the ADSL Lite mode, the
maximum line rates are 1536 kbit/s downstream and 512 kbit/s
upstream.
MW1122 supports both G.992.1 and G.992.2 ADSL
recommendations defined by ITU-T.
Rate adaptation is done in steps of 32 kbit/s. The ADSL interface of
MW1122 functions completely automatically and all configuration
related to the ADSL connection is done at the access multiplexer in the
operator’s premises. The network operator can set the data rates as a
part of the network management functionality provided by Nokia
DSLAM.
2.2.7 Point-to-Point Tunneling Protocol (PPTP)
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When PPTP local tunneling is used, a local network client initialises a
PPTP-tunneled PPP connection (VPN) to Nokia MW1122. The
modem terminates the tunnel and all data from that terminated local
PPTP tunnel will be forwarded to an assigned A TM VCC by using PPP
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over AAL5 encapsulation. Thus, each local PPTP tunnel requires an
equivalent ATM VCC assigned to it restricting the total number of
local PPTP hosts to 8.
Local tunneling is used when there is a need to have one or more
computers connected independently to different networks. For
example, in remote work application, the rest of the family may be
using the common ISP services and one or two family members need to
gain access to their corporate networks. With local tunneling, these
remote workers may be connected to a different network than the rest
of the users.
Local tunneling is activated using the PPTP client running, for
example, in Windows The destination IP address must be MW1122
LAN/WLAN/VBRIDGE IP address depending on the configuration.
PPP packets within PPTP are mapped to the configured VCC.
MW1122 has three dif ferent ways to choose the A TM VCC that will be
used for tunneling:
D Automatic, chooses the first free VCC
D Chooses the VCC number using C:number, where number is from
1 to 8. C:number is typed after the MW1122 IP address in PC’s
PPTP client Connect To window (see Figure 2-5).
D Chooses the VCC number using N:name, where name is the
VCCx description. N:name is fed after the MW1122 IP address.
Figure 2-5 Choosing the VCC2 for tunneling example
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2.2.8 Point-to-Point Protocol over Ethernet (PPPoE)
Standard PPPoE mode is used when MW1 122 is operating as a bridge.
PPPoE protocol defines how PPP sessions are mapped into Ethernet
packets. When MW1122 operates as a bridge, this protocol is
transparent to MW1122.
2.2.9 Payload encapsulations
Both routed and bridged protocols are encapsulated in the A TM link by
using either RFC 2684 LLC/SNAP encapsulation or VC multiplexing.
MW1122 also supports PPP over AAL5 encapsulation, in which
routed protocols are first encapsulated in PPP (RFC 1661). PPP is then
encapsulated in ATM according to the IETF PPP over AAL5 using
RFC 2364 VC multiplexing or LLC/NLPID encapsulation.
2.2.10 Access list authorisation
When a wireless LAN is used, it is important to be able to control the
clients accessing to MW1122. Therefore, MAC-address-based access
control may be used. It prevents all communications to a such client
whose MAC address does not appear on the access list. When a new
client is brought to the network, its MAC address needs to be added to
the access list. This can be done manually through the local command
line interface (CLI) or with a Web browser management.
2.2.11 Wireless LAN and radio interface
MW1122 supports wireless LAN to be used as one of the interfaces.
The wireless LAN utilises Nokia C110/C111 Wireless LAN PC card
which needs to be inserted to the designated PC Card slot on the back
panel of the modem. Only Nokia C110 or C111 Wireless LAN cards
can be used. Without a wireless LAN card, MW1122 operates as a
normal ADSL terminal with one 10Base-T Ethernet interface. The
wireless LAN card can be inserted to the PC Card slot while the
modem is operating and the wireless LAN connectivity will be
achieved without restarting the modem. Only the WLAN subsytem
must be reseted through the web interface or the command line
interface.
2-12
Wireless LAN used in MW1122 is based on IEEE802.11 standard
operating at 2.4 GHz radio band. The band has been divided into
subchannels which are dependent on local regulations. Typically, in
Europe, there are 13 and, in USA, 11 channels. The transmission
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power is limited to 100 mW/MHz giving typical indoor coverage of 20
to 50 metres.
2.2.12 Wired Encryption Privacy (WEP)
MW1122 supports full-speed WEP encryption and both
authentication methods defined in IEEE 802.11b: Open-key and
shared-key authentication. The encryption is 40-bit RC4 WEP
encryption. Additionally, MW1122 supports 128-bit RC4 WEP
encryption.
2.2.13 Weighted Fair Queueing (Class of Service)
As a Class of Service (CoS) function, MW1122 supports Weighted
Fair Queueing (WFQ) for each ATM VCC. The CoS function ensures
that different IP traffic flows are treated fairly in the upstream (towards
the Internet) direction. This may be necessary, in some cases, because
the upstream capacity of the ADSL line is somewhat limited compared
to the Ethernet bandwidth on the office or home LAN. The WFQ CoS
function classifies IP traffic flows based on IP address, protocol and
port fields. It is capable of identifying the IP flow from all supported
payload encapsulation formats. WFQ works properly only with
IP-based protocols. If the flow is IP-based but is encrypted using IPSec
or PPP encryption, then WFQ cannot identify the flows correctly. In
this case, the default flow is used and the default flow is treated as a
single flow.
2.2.14 Management
There are three management methods in MW1122:
D Command line interface (CLI) through console serial port
D CLI via telnet
D Web browser management
The CLI allows complete configuration of the unit; the Web browser
management allows the configuration of the most frequently used
configuration parameters.
2.2.15 Dedicated management channel
The operator or the Internet Service Provider can establish a dedicated
management channel to MW1122. This channel provides access to the
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MW1122 management (with telnet or W eb browser) and it can be used
to upload a new software to MW1122.
The dedicated management channel is separated from the other IP
stack. It is not possible to access the other interfaces or networks
behind the data interfaces through the dedicated management channel.
Similarly , access from LAN/WLAN or data VCCs to the management
channel is blocked. The management channel supports only routing
using the following encapsulations:
D RFC2684 LLC encapsulation for bridged IP (ETH-LLC)
D RFC2684 LLC encapsulation for routed IP (IP-LLC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 (PPP-VC)
In Figure, 2-6 VCC1 is used for customers data transmission.
Administration through this channel has been disabled. The operator
or the service provider uses the management VCC for management
purposes only.
LAN
10Base-T
Home
network
Nokia
MW1122
ISP’s NMS Network management system
VCC1/Data
(admin disabled)
Management VCC
Figure 2-6 Dedicated management channel
Internet
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Interfaces and indicator lights
Chapter 3
Interfaces and indicator lights
This chapter describes the external interfaces of MW1122 and
introduces its front panel indicator lights.
3.1 Interfaces
MW1122 has one ADSL line interface and two LAN interfaces
WLAN and 10Base-T Ethernet. It also has a local management
interface (CLI) for management purposes. The ADSL line interface is
compatible with ITU-T G.992.1 specification. The wireless LAN port
interface supports Nokia’s 1 1 Mbit/s IEEE 802.1 1b WLAN PC Card.
Power switch
Mains connector
Figure 3-1 MW1122 back panel
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WLAN (PC card)Local management interface
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3.1.1 Ethernet interface
The Ethernet interface (ETH) is located on the back panel. The
Ethernet interface is a standard 10 Mbit/s half-duplex 10Base-T
interface. The mechanical connector is an 8-pin RJ-45. The pin-out
numbering is shown in Table 3-1.
18
Figure 3-2 ETH connector
PIN Signal Direction
1 Tx+ –> Transmit data +
2 Tx– –> Transmit data –
3 Rx+ <– Receive data +
6 Rx– <– Receive data –
Table 3-1 Ethernet interface pin-out numbering
3.1.2 ADSL interface
The ADSL interface (DSL) is compatible with ITU-T G.992.1
specification. The mechanical connector is a 6-pin RJ-11. The pin-out
numbering is shown in Table 3-2.
16
MDI signal
MW1122-
Ethernet
3-2
Figure 3-3 DSL connector
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PIN Signal
3 DSL1
4 DSL2
Table 3-2 ADSL interface pin-out numbering
3.2 Command line interface
The command line interface (CLI) is RS-232 interface with an RJ-45
mechanical connector . The pin-out numbering is shown in Table 3-3.
18
Interfaces and indicator lights
Figure 3-4 CLI connector
PIN Signal Direction
1 107 DSR
(const. ON)
2 108 DTR <– Data terminal ready
3 109 DCD
(const. ON)
4 102 SG Signal ground
5 103 TxD <– Transmitted data
6 104 RxD –> Received data
7 105 RTS
(not in use)
8 106 CTS
(const. ON)
MDI signal
M5112-ter-
minal
–> Data set ready
–> Data channel re-
ceived line signal detector
<– Request to send
–> Clear to send
Table 3-3 Command line interface pin-out numbering
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3.3 Indicator lights
MW1122 has six indicator lights on the front panel: PWR, STA,
WLAN, COL, ETH, and DSL. STA indicator is red. Other indicators
are green.
Figure 3-5 MW1122 front panel indicators
DSL
GREEN
Off ADSL link is down.
Blinks ADSL connection is being established.
On ADSL link is up.
ETH
GREEN
Off Ethernet is down.
On 10Base-T Ethernet is functional
Blinks Receives traffic from Ethernet.
COL
GREEN
Blinks Collisions on the Ethernet. Note, that it is normal that some
collisions occur on the Ethernet.
3-4
WLAN
GREEN
Off No stations on the WLAN or WLAN PC Card not
inserted.
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Interfaces and indicator lights
On Stations on the WLAN but no traffic.
Blinks Receives traffic through the WLAN interface.
STA
RED
Off OK
On Hardware malfunction during startup.
PWR
GREEN
Off Power off.
On Power on.
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