Juniper JUNOSE 11.2.X PHYSICAL LAYER User manual

JunosE™ Software
for E Series™ Broadband
Services Routers
Physical Layer Configuration Guide
Release
11.2.x
Published: 2010-06-17
Copyright © 2010, Juniper Networks, Inc.

Juniper Networks, Inc.
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Sunnyvale, California 94089
USA
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www.juniper.net
Juniper Networks, Junos, Steel-Belted Radius, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United
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Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify,
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Products made or sold by Juniper Networks or components thereof might be covered by one or more of the following patents that are
owned by or licensed to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,192,051, 6,333,650, 6,359,479, 6,406,312,
6,429,706, 6,459,579, 6,493,347, 6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785.
JunosE™ Software for E Series™ Broadband Services Routers Physical Layer Configuration Guide
Release 11.2.x
Copyright © 2010, Juniper Networks, Inc.
All rights reserved. Printed in USA.
Writing: Krupa Chandrashekar, Subash Babu Asokan, Mark Barnard, Bruce Gillham, Sarah Lesway-Ball, Helen Shaw, Brian Wesley Simmons,
Fran Singer, Michael Taillon
Editing: Benjamin Mann
Illustration: Nathaniel Woodward
Cover Design: Edmonds Design
Revision History
July 2010—FRS JunosE 11.2.x
The information in this document is current as of the date listed in the revision history.
YEAR 2000 NOTICE
Juniper Networks hardware and software products are Year 2000 compliant. The Junos OS has no known time-related limitations through
the year 2038. However, the NTP application is known to have some difficulty in the year 2036.
Copyright © 2010, Juniper Networks, Inc.ii

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Copyright © 2010, Juniper Networks, Inc.vi

Abbreviated Table of Contents
AbouttheDocumentation.........................................xix
Part 1 Chapters
Chapter 1 Configuring Channelized T3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2 Configuring T3 and E3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Chapter 3 Configuring Unchannelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . 71
Chapter 4 Configuring Channelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . . 105
Chapter 5 Configuring Ethernet Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Chapter 6 Managing Tunnel-Service and IPSec-Service Interfaces . . . . . . . . . . . . . . 207
Part 2 Index
Index ...........................................................227
viiCopyright © 2010, Juniper Networks, Inc.

Copyright © 2010, Juniper Networks, Inc.viii
JunosE 11.2.x Physical Layer Configuration Guide

Table of Contents
AbouttheDocumentation.........................................xix
E Series and JunosE Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . xix
Audience..........................................................xix
E Series and JunosE Text and Syntax Conventions . . . . . . . . . . . . . . . . . . . . . . . . xix
ObtainingDocumentation............................................xxi
DocumentationFeedback............................................xxi
RequestingTechnicalSupport........................................xxi
Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
OpeningaCasewithJTAC........................................xxii
Part 1 Chapters
Chapter 1 Configuring Channelized T3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Overview...........................................................3
MDL/FDLSupport................................................3
MDL Standards ..............................................4
FDLStandards...............................................4
Timeout of Received MDL and FDL Messages . . . . . . . . . . . . . . . . . . . . . . 4
FrequencyofFDLPathMessages................................5
Higher-LevelProtocols............................................5
Platform Considerations ..............................................5
CT3/T3-F0 Line Modules and CT3/T3 12 I/O Modules . . . . . . . . . . . . . . . . . . . 6
ExchangingModules..............................................6
InterfaceStack..................................................6
Numbering Scheme ..............................................7
T3Controllers................................................7
T1 Channels .................................................7
FractionalT1.................................................8
HDLCChannels..............................................9
References .........................................................9
BeforeYouConfigureanInterface.......................................9
Configuration Tasks .................................................10
ConfiguringaT3Controller........................................10
ConfiguringMDLMessages.....................................11
OtherOptionalTasks.........................................12
ConfiguringT1Channels..........................................14
OptionalTasks..............................................14
ConfiguringFDLMessages.....................................17
ConfiguringanHDLCChannel......................................19
OptionalTasks..............................................19
ConfigurationExample...............................................22
ixCopyright © 2010, Juniper Networks, Inc.

TestingInterfaces...................................................22
TestingattheT3Layer...........................................23
TestingattheT1Layer...........................................25
MonitoringInterfaces................................................27
SettingaBaseline...............................................28
Displaying Counters and Time Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
OutputFiltering.................................................28
Chapter 2 Configuring T3 and E3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Overview..........................................................45
MDLSupport...................................................45
MDLStandards.............................................46
Timeout of Received MDL Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Higher-LevelProtocols...........................................47
Platform Considerations .............................................47
COCX-F3 Line Modules and Associated I/O Modules . . . . . . . . . . . . . . . . . . . 47
OCx/STMx/DS3-ATM Line Modules and 4xDs3 ATM I/O Modules . . . . . . . . 48
CT3/T3-F0 Line Modules and CT3/T3 12 I/O Modules . . . . . . . . . . . . . . . . . . 48
InterfaceStack.................................................49
NumberingScheme.............................................49
References ........................................................50
BeforeYouConfigureanInterface......................................50
ConfigurationTasks..................................................51
ConfiguringaT3oranE3Controller.................................51
ConfiguringMDLMessages....................................52
OptionalTasks..............................................53
ConfiguringFractionalT3.........................................55
ConfiguringanHDLCChannel.....................................57
OptionalTasks..............................................57
Configuration Examples .............................................59
Testing Interfaces ..................................................60
SendingBERTPatterns..........................................60
Enabling Local, Network, and Payload Loopback . . . . . . . . . . . . . . . . . . . . . . 61
EnablingRemoteLoopback.......................................62
MonitoringInterfaces................................................63
SettingaBaseline...............................................63
Displaying Counters and Time Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
OutputFiltering.................................................64
Chapter 3 Configuring Unchannelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . 71
Overview ..........................................................71
APSandMSP...................................................71
AutomaticSwitchover........................................72
ManualSwitchover...........................................72
Switching Mechanisms .......................................72
ReversionAfterSwitchover....................................73
Copyright © 2010, Juniper Networks, Inc.x
JunosE 11.2.x Physical Layer Configuration Guide

Communication Methods .....................................73
Higher-LevelProtocols...........................................75
Platform Considerations .............................................75
OCx/STMx/DS3-ATMLineModules................................76
OCx/STMxPOSLineModules.....................................76
OC48LineModules..............................................77
OC3/STM1GE/FELineModule.....................................77
ES24GLineModule.............................................78
E120RouterConfiguration.....................................78
E320RouterConfiguration....................................78
OCx/STMxATMIOAs.........................................78
OCx/STMxPOSIOAs.........................................79
NumberingScheme .............................................79
ERX7xx Models, ERX14xx Models, and the ERX310 Router . . . . . . . . . . . 79
E120andE320Routers.......................................80
InterfaceSpecifier...............................................81
ExchangingModules.............................................81
References ........................................................81
ConfigurationTasks.................................................82
ConfiguringtheSONET/SDHLayers................................82
ConfiguringAPS/MSP............................................87
Configuring the Working Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Configuring the Protect Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
ConfiguringSONET/SDHAlarms...............................90
ConfigurationExample........................................91
Configuring APS Event Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Manual Switching to a Redundant Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
TestingInterfaces...................................................93
LoopbackTesting...............................................93
TestingConnectivity.............................................93
MonitoringSONET/SDHInterfaces.....................................94
MonitoringInterfaceStatistics.....................................94
Monitoring APS/MSP ...........................................102
Chapter 4 Configuring Channelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . . 105
Overview.........................................................105
SONETAPSandSDHMSP.......................................105
MDL/FDLSupport..............................................105
MDL Standards ............................................106
FDLStandards.............................................106
Timeout of Received MDL and FDL Messages . . . . . . . . . . . . . . . . . . . . 106
FrequencyofFDLPathMessages..............................107
Higher-LevelProtocols ..........................................107
PlatformConsiderations.............................................107
cOCx/STMxFOLineModule.....................................108
Interface Stack ................................................108
SONET/SDHVTControllers..................................109
T3 Controllers ..............................................112
HDLC .....................................................112
xiCopyright © 2010, Juniper Networks, Inc.
Table of Contents

NumberingScheme.............................................112
References ........................................................113
BeforeYouConfigureanInterface.....................................114
ConfigurationTasks.................................................115
SONET/SDHConfigurationTasks..................................115
ConfiguringHigherLayers.....................................119
T1/E1ConfigurationTasks........................................119
ConfiguringanUnframedE1Line...............................120
ConfiguringT1andE1Lines....................................121
Configuring T1 Interfaces to Send FDL Messages . . . . . . . . . . . . . . . . . . 123
Disabling Interfaces and Channel Groups . . . . . . . . . . . . . . . . . . . . . . . . 125
ConfiguringHigherLayers....................................126
T3ConfigurationTasks..........................................126
ConfiguringT3LineParameters...............................126
Configuring T3 Interfaces to Send MDL Messages . . . . . . . . . . . . . . . . . 128
Configuring T1 Channels on T3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . 129
Configuring T1 Channels to Send FDL Messages . . . . . . . . . . . . . . . . . . . 132
ConfiguringHigherLayers....................................134
HDLC Channel Configuration Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
OptionalTasks.............................................134
ConfigurationExamples.............................................136
Example 1: Configuring Interfaces in SONET Mode . . . . . . . . . . . . . . . . . . . . 137
Example 2: Configuring Interfaces in SDH Mode . . . . . . . . . . . . . . . . . . . . . . 138
Example 3: Configuring Frame Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Example4:ConfiguringPPP......................................139
TestingInterfaces..................................................139
SendingBERTPatterns..........................................140
ReceivingBERTPatterns.........................................141
Enabling Local or Network Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Enabling Remote Loopback Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
TestingConnectivity............................................146
Monitoring Interfaces ...............................................147
SettingaBaseline..............................................148
OutputFiltering................................................148
MonitoringAPS/MSP...........................................166
Chapter 5 Configuring Ethernet Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Ethernet Overview .................................................167
Features......................................................168
Ethernet Interface Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Numbering Scheme ............................................169
ERX7xx Models, ERX14xx Models, and the ERX310 Router . . . . . . . . . . 169
E120andE320Routers......................................169
InterfaceSpecifier..............................................170
FastEthernetI/OModules...........................................170
FE-8I/OModule...............................................170
FE-8SFPI/OModule............................................170
Copyright © 2010, Juniper Networks, Inc.xii
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Gigabit Ethernet I/O Modules and IOAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
GEI/OModule..................................................171
GE-2SFPI/OModule............................................171
PortsonGE-2SFPI/OModule.................................172
Bandwidth and Line Rate Considerations . . . . . . . . . . . . . . . . . . . . . . . . 172
GE-8I/OModule...............................................172
Bandwidth and Line Rate Considerations . . . . . . . . . . . . . . . . . . . . . . . . 173
Managing High-Density Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
OC3-2GEAPSI/OModule.......................................174
ES2-S1GE-4IOA...............................................174
ES2-S1GE-8IOA...............................................174
ES24GLMCombination.....................................175
ES210GLMCombination.....................................177
ES210GADVLMCombination.................................179
ES2-S3GE-20IOA.............................................180
ES210GLMCombination....................................180
Bandwidth and Line Rate Considerations . . . . . . . . . . . . . . . . . . . . . . . . 181
Managing High-Density Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
ES210GADVLMCombination.................................181
Bandwidth and Line Rate Considerations . . . . . . . . . . . . . . . . . . . . . . . . 182
Managing High-Density Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
10-GigabitEthernetIOAs............................................182
ES2-S110GEIOA...............................................182
Managing High-Density Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
ES2-S210GEPRIOA............................................183
ES210GUplinkLMCombination...............................183
ES210GLMCombination....................................184
ES210GADVLMCombination................................185
EthernetReferences................................................186
High-Density Ethernet ..............................................187
Managing Port Redundancy on Gigabit Ethernet I/O Modules . . . . . . . . . . . . . . . 188
ConfigurationTasksforEthernet......................................189
ConfiguringthePhysicalInterface.....................................190
DisablingEthernetInterfaces.........................................195
MonitoringEthernetInterfaces.......................................196
SettingStatisticsBaselines......................................196
UsingEthernetshowCommands..................................196
xiiiCopyright © 2010, Juniper Networks, Inc.
Table of Contents

Chapter 6 Managing Tunnel-Service and IPSec-Service Interfaces . . . . . . . . . . . . . . 207
Tunnel-Service and IPSec-Service Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
TypesofTunnel-ServerPorts.....................................208
DedicatedTunnel-ServerPorts...............................208
SharedTunnel-ServerPorts..................................208
Types of Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Tunnel-Service Interface Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . 209
Supported Modules for Dedicated Tunnel-Server Ports . . . . . . . . . . . . . . . . 209
ERX7xx Models, ERX14xx Models, and the ERX310 Router . . . . . . . . . . 209
E120andE320Routers......................................210
Supported Modules for Shared Tunnel-Server Ports . . . . . . . . . . . . . . . . . . . 210
ERX14xx Models and the ERX310 Broadband Services Router . . . . . . . 210
E120andE320Routers......................................210
NumberingScheme.............................................211
ERX7xx Models, ERX14xx Models, and the ERX310 Router . . . . . . . . . . . 211
E120andE320Routers.......................................211
InterfaceSpecifier...............................................211
Supported Applications for Dedicated and Shared Tunnel-Server Ports . . . 212
Redundancy and Interface Distribution of Tunnel-Service Interfaces . . . . . . . . . 212
SMs, ES2-S1 Service IOA, and Shared Tunnel-Server Modules . . . . . . . . . . . 213
Static IP Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Dynamic Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Interface Allocation for Shared Tunnel-Server Modules . . . . . . . . . . . . . 214
ISMs .........................................................214
Tunnel-Service Interface Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Provisioning Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Bandwidth Limitations of Shared Tunnel-Server Ports . . . . . . . . . . . . . 215
Exchanging Tunnel-Server Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Unprovisioned Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Configuring Tunnel-Server Ports and Tunnel-Service Interfaces . . . . . . . . . . . . . 217
Identifying the Physical Location of the Tunnel-Server Port . . . . . . . . . . . . . 217
Provisioning the Maximum Number of Interfaces on a Tunnel-Server
Port ......................................................217
Reserving Bandwidth on Shared Tunnel-Server Ports . . . . . . . . . . . . . . . . . . 218
Verifying the Tunnel-Server Interface Configuration . . . . . . . . . . . . . . . . . . . 219
Unprovisioning Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Monitoring Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Part 2 Index
Index ............................................................227
Copyright © 2010, Juniper Networks, Inc.xiv
JunosE 11.2.x Physical Layer Configuration Guide

List of Figures
Part 1 Chapters
Chapter 1 Configuring Channelized T3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 1: Stack for Channelized T3 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2: T1 Channels and DS0 Timeslots on a T3 Line . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2 Configuring T3 and E3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure3:StackforT3ATMInterfaces...................................49
Figure 4: Stack for T3 Frame and E3 Frame Interfaces . . . . . . . . . . . . . . . . . . . . . 49
Chapter 3 Configuring Unchannelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . 71
Figure 5: Interface Stack for OCx/STMx/DS3-ATM Interfaces . . . . . . . . . . . . . . . . 76
Figure 6: Interface Stack for OCx/STMx POS and OC48/STM16 Interfaces . . . . . 77
Figure 7: Interface Stack for OCx/STMx POS Interfaces . . . . . . . . . . . . . . . . . . . . . 79
Chapter 4 Configuring Channelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . . 105
Figure 8: Stack for cOCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure9:SONETMultiplexing.........................................110
Figure10:SDHMultiplexing...........................................111
Figure 11: Configuring Fractional T1 in SONET Mode . . . . . . . . . . . . . . . . . . . . . . . 137
Figure 12: Configuring Fractional E1 and Unframed E1 in SDH Mode . . . . . . . . . . . 138
Chapter 6 Managing Tunnel-Service and IPSec-Service Interfaces . . . . . . . . . . . . . . 207
Figure 13: Interface Stacking for Tunnel-Service Interfaces . . . . . . . . . . . . . . . . . 207
xvCopyright © 2010, Juniper Networks, Inc.

Copyright © 2010, Juniper Networks, Inc.xvi
JunosE 11.2.x Physical Layer Configuration Guide

List of Tables
AbouttheDocumentation.........................................xix
Table1:NoticeIcons.................................................xx
Table2:TextandSyntaxConventions...................................xx
Part 1 Chapters
Chapter 1 Configuring Channelized T3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 3: MDL and FDL Message Strings and Message Types . . . . . . . . . . . . . . . . . . 4
Table 4: Sample T1 Subchannel/Timeslot Assignments . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2 Configuring T3 and E3 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 5: MDL Message Strings and Message Types . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 3 Configuring Unchannelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . 71
Table 6: Sample Pairings for Valid APS/MSP Groups . . . . . . . . . . . . . . . . . . . . . . . 72
Table7:ExplanationofK1Byte........................................74
Table8:ExplanationofK2Byte........................................74
Chapter 4 Configuring Channelized OCx/STMx Interfaces . . . . . . . . . . . . . . . . . . . . . . 105
Table 9: MDL and FDL Message Strings and Message Types . . . . . . . . . . . . . . . . 106
Table 10: Tributary Standards That cOCx/STMx Interfaces Support . . . . . . . . . . 110
Table 11: Identifiers for SONET/SDH VT Controllers . . . . . . . . . . . . . . . . . . . . . . . . 111
Table 12: Definitions for Identifiers for SONET/SDH VT Controllers . . . . . . . . . . . . 111
Table 13: Identifiers for T3 Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Chapter 5 Configuring Ethernet Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Table 14: Average Data Rate for ERX310 router or in Slots 2 or 4 of an ERX1440
router ........................................................173
Table 15: Average Data Rate When Installed in All Other Slots on an ERX1440
router ........................................................173
Table 16: Average Data Rate for One ES2-S1 GE-8 IOA Installed with an ES2 4G
LM...........................................................175
Table 17: Average Data Rate for Two ES2-S1 GE-8 IOAs Installed with an ES2
4GLM........................................................176
Table 18: Average Data Rate for ES2-S1 GE-8 IOA Combined with Other IOA
TypesinSameSlot..............................................177
Table 19: Average Data Rate for One ES2-S1 GE-8 IOA Installed with an ES2 10G
LM...........................................................178
Table 20: Average Data Rate for Two ES2-S1 GE-8 IOAs Installed with an ES2
10GLM.......................................................178
Table 21: Average Data Rate for One ES2-S1 GE-8 IOA Installed with an ES2 10G
ADVLM.......................................................179
xviiCopyright © 2010, Juniper Networks, Inc.

Table 22: Average Data Rate for Two ES2-S1 GE-8 IOAs Installed with an ES2
10GADVLM...................................................180
Table 23: Average Data Rate for One ES2-S3 GE-20 IOA Installed with an ES2
10G LM .......................................................181
Table 24: Average Data Rate for One ES2-S3 GE-20 IOA Installed with an ES2
10GADVLM...................................................182
Chapter 6 Managing Tunnel-Service and IPSec-Service Interfaces . . . . . . . . . . . . . . 207
Table 25: Sample Capacity, Configuration, and Utilization Values for
Tunnel-ServiceInterfaces........................................216
Copyright © 2010, Juniper Networks, Inc.xviii
JunosE 11.2.x Physical Layer Configuration Guide

About the Documentation
•E Series and JunosE Documentation and Release Notes on page xix
•Audience on page xix
•E Series and JunosE Text and Syntax Conventions on page xix
•Obtaining Documentation on page xxi
•Documentation Feedback on page xxi
•Requesting Technical Support on page xxi
E Series and JunosE Documentation and Release Notes
For a list of related JunosE documentation, see
http://www.juniper.net/techpubs/software/index.html .
If the information in the latest release notes differs from the information in the
documentation, follow the JunosE Release Notes.
To obtain the most current version of all Juniper Networks®technical documentation,
see the product documentation page on the Juniper Networks website at
http://www.juniper.net/techpubs/.
Audience
This guide is intended for experienced system and network specialists working with
Juniper Networks E Series Broadband Services Routers in an Internet access environment.
E Series and JunosE Text and Syntax Conventions
Table 1 on page xx defines notice icons used in this documentation.
xixCopyright © 2010, Juniper Networks, Inc.

Table 1: Notice Icons
DescriptionMeaningIcon
Indicates important features or instructions.Informational note
Indicates a situation that might result in loss of data or hardware damage.Caution
Alerts you to the risk of personal injury or death.Warning
Alerts you to the risk of personal injury from a laser.Laser warning
Table 2 on page xx defines text and syntax conventions that we use throughout the
E Series and JunosE documentation.
Table 2: Text and Syntax Conventions
ExamplesDescriptionConvention
•Issue the clock source command.
•Specify the keyword exp-msg.
Represents commands and keywords in text.Bold text like this
host1(config)#traffic class low-loss1Represents text that the user must type.Bold text like this
host1#show ip ospf 2
Routing Process OSPF 2 with Router
ID 5.5.0.250
Router is an Area Border Router
(ABR)
Represents information as displayed on your
terminal’s screen.
Fixed-width text like this
•There are two levels of access: user and
privileged.
•clusterId, ipAddress.
•Appendix A, System Specifications
•Emphasizes words.
•Identifies variables.
•Identifies chapter, appendix, and book
names.
Italic text like this
Press Ctrl + b.Indicates that you must press two or more
keys simultaneously.
Plus sign (+) linking key names
Syntax Conventions in the Command Reference Guide
terminal lengthRepresents keywords.Plain text like this
mask,accessListNameRepresents variables.Italic text like this
Copyright © 2010, Juniper Networks, Inc.xx
JunosE 11.2.x Physical Layer Configuration Guide