Nokia M11 T66220 User manual

Nokia M11
T66220
USER'S MANUAL
ADSL Routerā

C33833001SE_00 ECopyright Nokia Networks Oy
Nokia M11
ADSL ROUTER
User’s Manual
C33833.20 A0

Nokia M11 User’s Manual
ECopyright Nokia Networks Oy C33833001SE_00
ii
ECOPYRIGHT Nokia Networks Oy 1999
All rights reserved.
Nopartofthispublicationmaybecopied,distributed,transmitted,transcribed,storedinaretrieval
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
documentationinthebest way possiblefromthe user’sviewpoint. 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.

ECopyright Nokia Networks Oy
C33833001SE_00 iii
Document History
Document Date Comment
C33533001SE_00 30.12.1999

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Contents
Chapter 1
Introduction to Nokia M11 1-1. . . . . . . . . . . . . . . . . . . .
Chapter 2
Applications and features 2-1. . . . . . . . . . . . . . . . . . . . .
2.1 Applications 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Internet access using M11 as a NAPT router 2-1. . . . . . . . . . .
2.1.2 Remote work 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.3 LAN interconnection using M11 as a bridge 2-4. . . . . . . . . . .
2.2 Features 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Routing 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bridging 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Address Port Translation 2-5. . . . . . . . . . . . . . . . .
Dynamic Host Configuration 2-6. . . . . . . . . . . . . . . . . . . . .
ATM and ADSL 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payload encapsulations 2-7. . . . . . . . . . . . . . . . . . . . . . . . . .
Transmit priority selection 2-7. . . . . . . . . . . . . . . . . . . . . . . .
IGMP proxy function 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Management 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Dedicated management channel 2-8. . . . . . . . . . . . . . . . . . . . .
Chapter 3
Interfaces and indicator lights 3-1. . . . . . . . . . . . . . . . .
3.1 10Base-T Ethernet interface 3-1. . . . . . . . . . . . . . . . . . . . . . .
3.2 ADSL line interface 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Front panel indicator lights 3-3. . . . . . . . . . . . . . . . . . . . . . .

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STA indicator (M11 status) 3-3. . . . . . . . . . . . . . . . . . . . . . .
DSL indicator (ADSL line status) 3-3. . . . . . . . . . . . . . . . . .
LAN indicators 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4
Installing M11 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Internet access (NAPT router) 4-1. . . . . . . . . . . . . . . . . . . . .
Step 1a: Connect cables (data services only) 4-3. . . . . . . . .
Step 1b: Connect cables (data and telephone services) 4-3. .
Step 2: Switch on M11 4-3. . . . . . . . . . . . . . . . . . . . . . . . . .
Step 3: Switch on PC 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 4a: Connect to M11 with a Web browser (M11 password
disabled) 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 4b: Connect to M11 with a Web browser (M11 password
enabled) 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 5a: Configure M11 (M11 password disabled) 4-5. . . . .
Step 5b: Configure M11 (M11 password enabled) 4-6. . . . .
Step 6: Surf 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Remote work (Basic router) 4-6. . . . . . . . . . . . . . . . . . . . . . .
Step 1: Connect cables 4-9. . . . . . . . . . . . . . . . . . . . . . . . . .
Step 2: Switch on your PC and start its terminal software 4-9
Step 3: Configure M11 4-10. . . . . . . . . . . . . . . . . . . . . . . . . .
Step 4: Connect your M11 to the network 4-14. . . . . . . . . . . .
Step 5: Check that the connection works 4-15. . . . . . . . . . . .
4.3 LAN interconnection (Basic Ethernet bridge) 4-16. . . . . . . .
Step 1: Connect cables 4-16. . . . . . . . . . . . . . . . . . . . . . . . . .
Step 2: Switch on your PC and start the terminal software 4-17
Step 3: Configure M11 using CLI commands 4-17. . . . . . . . .
Step 4: Connect your M11 to the network 4-22. . . . . . . . . . . .
Step 5: Check that the connection works 4-22. . . . . . . . . . . .
4.4 Default settings 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Troubleshooting 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Is the ADSL connection to the remote network working? 4-26
Is the Ethernet connection working? 4-26. . . . . . . . . . . . . . . .
Is the ATM connection working? 4-26. . . . . . . . . . . . . . . . . .
Is the PPP connection working? 4-27. . . . . . . . . . . . . . . . . . .

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Chapter 5
Management 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Browser management 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Opening a connection 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 QuickConfig page 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QuickStart page 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAP and CHAP Setup page 5-5. . . . . . . . . . . . . . . . . . . . . . .
PPP Connection Manager pages 5-5. . . . . . . . . . . . . . . . . . .
5.1.3 Router page 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling in router settings 5-8. . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.4 Bridge page 5-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling in bridge settings 5-12. . . . . . . . . . . . . . . . . . . . . . . . .
5.1.5 ATM page 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling in ATM settings 5-13. . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring ATM channels 5-14. . . . . . . . . . . . . . . . . . . . . . .
PPP over ATM (VC-muxed) 5-14. . . . . . . . . . . . . . . . . . . .
Other encapsulations 5-16. . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.6 NAT pinhole page 5-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinhole configuration example 5-19. . . . . . . . . . . . . . . . . . . .
5.1.7 SNMP page 5-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling in SNMP settings 5-20. . . . . . . . . . . . . . . . . . . . . . . . .
5.1.8 Monitor page 5-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Command line interface 5-22. . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Starting and ending a CLI session 5-22. . . . . . . . . . . . . . . . . . . .
Connecting with telnet 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting through console port 5-22. . . . . . . . . . . . . . . . . . .
Logging in 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Issuing CLI commands 5-24. . . . . . . . . . . . . . . . . . . . . . . . . .
Ending a CLI session 5-25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the CLI help facility 5-25. . . . . . . . . . . . . . . . . . . . . . .
Saving settings 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Root command hierarchy 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Root prompt 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Root command shortcuts 5-26. . . . . . . . . . . . . . . . . . . . . . . . .
Root commands 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Config command hierarchy 5-41. . . . . . . . . . . . . . . . . . . . . . . . .
Config prompt 5-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Navigating the Config hierarchy 5-42. . . . . . . . . . . . . . . . . . .
Displaying current settings 5-44. . . . . . . . . . . . . . . . . . . . . . .
Stepping through M11 configuration 5-44. . . . . . . . . . . . . . . .
Validating your configuration 5-45. . . . . . . . . . . . . . . . . . . . .

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Config command reference 5-45. . . . . . . . . . . . . . . . . . . . . . .
System settings 5-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLI preferences 5-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ATM settings 5-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DMT (ADSL) setting 5-51. . . . . . . . . . . . . . . . . . . . . . . . .
TCP/IP settings 5-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static route settings 5-69. . . . . . . . . . . . . . . . . . . . . . . . . . .
BNCP setting 5-73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHCP settings 5-74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Domain Name System settings 5-76. . . . . . . . . . . . . . . . . .
Bridging settings 5-77. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PPP settings 5-79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SNMP settings 5-85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinhole settings 5-88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated server settings 5-90. . . . . . . . . . . . . . . . . . . . . . .
5.3 SNMP 5-91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Software download 5-92. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6
How your Nokia M11 works 6-1. . . . . . . . . . . . . . . . . . .
6.1 ADSL 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 ATM over ADSL 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Routing and bridging 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.1 TCP/IP routing 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.2 Static and dynamic routes 6-2. . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.3 Bridging 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4 Network Address Port Translation (NAPT) 6-3. . . . . . . . . .
6.4.1 Pinhole 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 IP address management 6-4. . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 IP multicast 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.7 Payloadencapsulation 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8 Point-to-pointprotocol(PPP) 6-6. . . . . . . . . . . . . . . . . . . . . .
6.8.1 Authentication 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8.2 Network configuration 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.9 Dynamic Host Configuration Protocol(DHCP) 6-8. . . . . . .
6.9.1 DHCP for LAN clients 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.9.2 DHCP for WAN port configuration 6-9. . . . . . . . . . . . . . . . . . .

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6.10 Domain Name Service (DNS) relay 6-9. . . . . . . . . . . . . . . . .
Appendix A
Technical specifications A-1. . . . . . . . . . . . . . . . . . . . . . .
A.1 Features A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 Mechanical construction and power supply A-2. . . . . . . . . .
A.3 Ambient conditions, EMC and safety A-3. . . . . . . . . . . . . . .
Ambient conditions A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary

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Introduction to Nokia M11
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Chapter 1
Introduction to Nokia M11
NokiaM11 isanADSL(AsymmetricDigitalSubscriberLine)modem
which enables high-speed Internet access and LAN (Local Area
Network) interconnection. It increases the capacity of the already
installed telephone lines used traditionally for telephone services.
M11 enables high-speed connections for residential users, small
offices and telecommuters.
Figure 1-1 Nokia M11
NokiaM11isamodemwithan ADSLrouterandbridge.Thisallowsa
PC equipped with a 10Base-T Ethernet interface to be connected to a

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remote IP network via a Digital Subscriber Line Access Multiplexer
(DSLAM) and an ATM access network. M11 can also act as a bridge
between the Ethernet LAN and ADSL/ATM network interfaces. M11
is compatible with Nokia D DSLAM.
The ADSL transmission is based on a DMT (Discrete multitone) line
code and it provides speeds up to 8 Mbit/s downstream (from the
network) and 1 Mbit/s upstream (to the network). M11 can adjust its
speed to the line conditions in steps of 32 kbit/s, maximising the data
throughputover the given distance. Nokia M11 is compatible with the
existing and emerging ADSL standards: ANSI T1.413 Issue 2 (ANSI
ADSL), ITU-T G.992.1 (ITU-T ADSL), ITU-T G.992.2 (ITU-T
ADSL Lite), and ITU-T G.996.1 (Handshake).
M11 provides optimised access to high-speed data services. It can be
used to connect telecommuters to the corporate network or netsurfers
to the Internet Service Provider’s (ISP) network, for example.
Asadefault,M11supportsplug-and-playoperationforInternetaccess
applications. The ADSL connection, data connection and Internet
network addresses are set up automatically.
M11hasanintegratedWebserverwhich enablesconfiguringthemost
frequently used parameters with an ordinary Web browser. M11 can
also be managed through a command line interface viatelnet protocol
or via local console interface.
An external POTS (Plain Old Telephone System) filter enables the
simultaneoususe ofthe conventionaltelephone serviceand theADSL
data services.

Applicationsand features
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Chapter 2
Applications and features
This chapter introduces the most common applications, features and
management method options of M11.
2.1 Applications
M11 has three main applications:
DInternet access
DRemote work
DLAN interconnection
IntheseapplicationexamplesM11canactasarouter,bridgeorNAPT
router. The selected mode for every single application depends on the
access and service provider network architectures. Some basic
application examples are described in this chapter. See Chapter 6 for
more information on routing, bridging and Network Address Port
Translation.
2.1.1 Internet access using M11 as a NAPT router
M11 can connect your PC via your operator’s Digital Subscriber Line
Access Multiplexer (DSLAM) and ATM network to an Internet
Service Provider (ISP). If you are connected to a single ISP, the
networkaddresses(IPaddresses)inyourhomecanbepartoftheISP’s
IP address range. However, in many cases it is more practical that the
homenetworkisanindependentnetworkutilisingprivateIPaddresses
which are not visible to outside and that M11 has only one external IP
address received from the ISP. The external Internet services are

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accessed through this single IP address. This mode of operation is
called the Network Port Address Translation (NAPT).
The benefits of NAPT are the minimum coupling of the ISP and the
home network, the saving of public IP addresses, and in-built simple
firewall functionality.
LAN
Nokia M11
10Base-T ATM
network
Internet ISP Router
DSLAM
Home
network
Home
network
Home
network
Figure 2-1 Internet access using M10 as a NAPT router

Applicationsand features
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2.1.2 Remote work
In a typical remote work application M11 is used as an IP router to
provide access to corporate Intranet services. Using routing between
the home and the corporate networks prevents unnecessary broadcast
traffic and non-IP protocol traffic from loading the access connection
Still, it provides sufficient transparency for Intranet applications. The
M11 routing table can be static or it can be updated dynamically using
RIP version 1 and RIP version 2 routing protocols.
Nokia M11
10Base-T ATM
network
... Corporate
network
Remote
worker
Remote
worker
Remote
worker
Company
router
DSLAM
Figure 2-2 Remote work using M11 as a standard router

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2.1.3 LAN interconnection using M11 as a bridge
LAN interconnection between corporate headquarters and its remote
office is another typical M11 application. In the LAN interconnection
application, M11 is typically used as an Ethernet bridge which relays
all non-local Ethernet traffic between the corporate headquarters and
remote sites through the ATM core network.
Thebenefit ofbridgingin this application exampleisthetransparency
for all network protocols in a multiprotocol data communications
corporate network.
LAN
Nokia M11
10Base-T ATM
network
Company
bridge
...
LAN
10Base-T
Remote
office 1
Remote
office 2 Corporate
network
DSLAM
Figure 2-3 Internet access and LAN interconnection
2.2 Features
M11 can operate as an OSI layer 3 Internet Protocol (IP) router
betweentheEthernetinterfaceandthevirtualchannelsofADSL/ATM
interface. M11 supports both dynamic and static routing.
It can also operateas aself-learning bridge supportingup to 256MAC
addresses.

Applicationsand features
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M11 supports IGMP (Internet Group Management Protocol) proxy
function for IP multicast applications.
Routing
Routing is based on routing entries in a routing table. Static routes are
addedviathemanagementinterfaceanddynamicroutingisdoneusing
RIP and RIPv2. Routing is done between the Ethernet 10Base-T
interfaceandthevirtualchannelconnection(VCC)oftheATM/ADSL
interface. Optionally, the routing between the VCCs can be disabled.
M11 supports up to 8 simultaneous VCCs.
Bridging
Bridging is supported to provide full protocol transparency. Bridging
can be used simultaneously with IP routing. M11 works as a
self-learningbridge supporting up to 256 MAC addresses. Bridging is
done between the Ethernet 10Base-T interface and each ATM VCC
interface.Optionally, the bridging between the VCCs can be disabled.
M11 supports up to 8 simultaneous VCCs.
Network Address Port Translation
M11 supports Network Address Port Translation (NAPT) for TCP/IP
and UDP/IP protocols. When NAPT is used, a single IP address is
allocated to a VCC which leads to thepublic IPnetwork. TheEthernet
subnet has private IP addressing and is not visible to the VCC. NAPT
translatestheIPsourceaddressandsourceportnumberdynamicallyto
the VCC IP address and port number. Similarly, packets coming from
theVCCaremappedback totheoriginaldestinationaddresses.NAPT
allows up to 253 hosts to share a single VCC IP address to the public
network.TheNetworkAddressPortTranslationprincipleispresented
in Figure 2-4.
NAPT router
192.168.1.254
195.112.12.161
src:192.168.1.112:1228
dst:194.112.11.111:80
src:194.112.11.111:80
dst:192.168.1.112:1228
src:195.112.12.161:1234
dst:194.112.11.111:80
src:194.112.11.111:80
dst:195.112.12.161:1234
Home network (LAN) Internet (WAN)
Figure 2-4 Principle of Network Address Port Translation

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NAPT may restrict the operation of some IP applications. NAPT also
operates as a simple IP firewall because translation is only allowed
whenthe firstpacket istransmitted fromthe LAN.This meansthatthe
NAPTtable entry is created only when a packet is sent fromthe home
networktotheInternet.Withpinholecapability, theuser canadd 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.
Dynamic Host Configuration
M11 can act as a Dynamic Host Configuration Protocol (DHCP)
server for the PCs on the end-user home network. In this mode, M11
canassignupto253IPaddressestothePCsonthehomenetwork.M11
can also act as a DHCP relay agent and relay the DHCP requests to an
external DHCP server.
ATM and ADSL
M11 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
capacityistemporarilysharedbetweentheseVCCs.WhenoneVCCis
idle,thebandwidthisusedbyanotherVCC. M11alsosupportslimited
CBR on upstream (see Transmit priority selection in this chapter).
TheADSLtransmissionisbasedontheDMTline code.M11provides
a DMT line rate up to 8 Mbit/s downstream and up to 1 Mbit/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. M11
supports also ADSL Lite. In the ADSL Lite mode, the maximum line
rates are 1536 kbit/s downstream and 512 kbit/s upstream.
TheATMoverADSLtransmissionisbasedonITU-TG.992.1.ADSL
Lite is based on ITU-T G.992.2.
Rate adaptation is done in steps of 32 kbit/s. The ADSL interface of
M11 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 D
DSLAM.

Applicationsand features
ECopyright Nokia Networks Oy
C33833001SE_00 2-7
Payloadencapsulations
BothroutedandbridgedprotocolsareencapsulatedintheATMlinkby
usingeitherRFC1483LLC/SNAPencapsulationorVCmultiplexing.
M11 also supports PPP over AAL5 encapsulation, in which both
bridgedandroutedprotocolsarefirstencapsulatedinPPP(RFC1661).
PPP is then encapsulated in ATM according to the IETF PPP over
AAL5 using RFC 2364 VC multiplexing or LLC/NLPID
encapsulation.
See Chapter 6 for more information on the payload encapsulations.
Transmit priority selection
If you are using more than one upstream connections, you can set
prioritiestothese connections.Youcanalsosetthemaximumtransmit
rate to the connection. The following example explains the transmit
priority selection:
Connection Priority Maximum transmit
rate
VCC1 HIGH 400 kbit/s
VCC2 LOW 0 (no limit)
Table 2-1 Transmit priority selection example settings
ThesettingsshowninTable2-1affecttheconnectionsinthefollowing
way:
DWhen VCC1 is not transmitting, VCC2 can use the whole
bandwidth.
DWhenVCC2isnottransmitting,VCC1getsonly400kbit/sevenif
there was more bandwidth available on the upstream link.
DWhen VCC1 starts transmitting, it gets 400 kbit/s bandwidth and
VCC2 gets the rest of the available bandwidth.
DIfthe upstreambandwidth is400 kbit/sand VCC1uses 400kbit/s,
VCC2cannottransmitanythinguntilVCC1 startstotransmitless
than 400 kbit/s.
IGMP proxy function
M11 can be used as an IGMP proxy which means that M11 can send
IGMP queries and have IP hosts report their IP multicast host group
memberships. See Chapter 6 for more information aboutIP multicast.