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Routing Engine and Packet Forwarding Engine
A Services Router has two primary software processing components:
■ Routing Engine—The Routing Engine provides three main functions:
■ Creates the packet forwarding switch fabric for the Services Router, providing
route lookup, filtering, and switching on incoming data packets, then directing
outbound packets to the appropriate interface for transmission to the
network.
■ Maintains the routing tables used by the router and controls the routing
protocols that run on the router.
■ Provides control and monitoring functions for the router, including controlling
power and monitoring system status.
■ Packet Forwarding Engine—Processes packets; applies filters, routing policies,
and other features; and forwards packets to the next hop along the route to their
final destination.
For information about Routing Engine hardware, see “J2320 and J2350 Routing
Engine Hardware” on page 18 and “J4350 and J6350 Routing Engine
Hardware” on page 31.
Kernel and Microkernel
The Routing Engine kernel provides the underlying infrastructure for all JUNOS
software processes by doing the following:
■ Linking the routing tables maintained by the routing protocol process with the
forwarding table maintained by the Routing Engine
■ Coordinating communication with the Packet Forwarding Engine, primarily by
synchronizing the Packet Forwarding Engine’s forwarding table with the master
forwarding table maintained by the Routing Engine
The microkernel contains device drivers and processes that the Packet Forwarding
Engine uses to govern the flow of packets through the Services Router.
JUNOS Software Processes
The JUNOS software running on the Routing Engine and Packet Forwarding Engine
consists of multiple processes that are responsible for individual Services Router
functions.
The separation of functions provides operational stability, because each process
accesses its own protected memory space. In addition, because each process is a
separate software package, you can selectively upgrade all or part of the JUNOS
software, for added flexibility.
Table 17 on page 41 describes the primary JUNOS software processes.
40 ■ Software Overview
J2320, J2350, J4350, and J6350 Services Router Getting Started Guide
- Getting Started Guide 1
- End User License Agreement 3
- Abbreviated Table of Contents 5
- Table of Contents ■ ix 9
- Table of Contents 10
- Table of Contents ■ xi 11
- Table of Contents ■ xiii 13
- Part 5 Index 14
- About This Guide 15
- How to Use This Guide 16
- Document Conventions 17
- Documentation Feedback 21
- Requesting Technical Support 21
- J-series Overview 23
- 2 ■ J-series Overview 24
- Overview of Services Routers 25
- IPv6 routing and forwarding 29
- Encapsulation 31
- Traffic Management 31
- Ethernet Switching 31
- Activity Logging and 33
- Monitoring 33
- Administration 33
- System Overview 35
- Chapter 2: System Overview 37
- J2320 and J2350 Midplane 40
- J2320 and J2350 Boot Devices 41
- J2320 and J2350 Front Panel 41
- Power Button and POWER LED 42
- STATUS LED 43
- ALARM LED 43
- RESET CONFIG Button 44
- Console Port 45
- AUX Port 45
- J2320 Power System 46
- J2350 Power System 46
- J4350 and J6350 Chassis 49
- J4350 and J6350 Midplane 53
- J4350 and J6350 Boot Devices 53
- J4350 and J6350 Front Panel 54
- J4350 Power System 58
- J6350 Power System 59
- Software Overview 61
- Kernel and Microkernel 62
- JUNOS Software Processes 62
- User Interfaces 63
- 42 ■ Software Overview 64
- PIM and VoIP Module Overview 65
- PIM and VoIP Module Terms 66
- Field-Replaceable PIMs 68
- 48 ■ Field-Replaceable PIMs 70
- 50 ■ Field-Replaceable PIMs 72
- DescriptionStateColorFunction 73
- Field-Replaceable PIMs ■ 51 73
- 1-Port Gigabit Ethernet ePIMs 74
- Field-Replaceable PIMs ■ 53 75
- 54 ■ Field-Replaceable PIMs 76
- Dual-Port Serial PIM 77
- Dual-Port T1 or E1 PIM 78
- Field-Replaceable PIMs ■ 57 79
- 58 ■ Field-Replaceable PIMs 80
- T3 or E3 PIM 81
- Dual-Port Fast Ethernet PIM 82
- 4-Port Fast Ethernet ePIM 83
- 4-Port ISDN BRI PIMs 84
- Figure 37: ISDN BRI U PIM 85
- ADSL PIM 86
- G.SHDSL PIM 87
- Avaya VoIP Modules 88
- Avaya VoIP Module Summary 89
- 68 ■ Avaya VoIP Modules 90
- Avaya VoIP Modules ■ 69 91
- 70 ■ Avaya VoIP Modules 92
- J2350 Services Router 93
- 72 ■ Avaya VoIP Modules 94
- Avaya VoIP Modules ■ 73 95
- 74 ■ Avaya VoIP Modules 96
- Table 40: LEDs for TIM510 97
- 76 ■ Avaya VoIP Modules 98
- Table 44: LEDs for TIM516 99
- 78 ■ Avaya VoIP Modules 100
- Table 46: LEDs for TIM518 101
- 80 ■ Avaya VoIP Modules 102
- Chapter 4 103
- CLI Overview 104
- Before You Begin 104
- Starting the J-Web Interface 105
- J-Web Layout 105
- Using the J-Web Interface 105
- Figure 48: J-Web Layout 106
- Top Pane Elements 107
- Main Pane Elements 107
- Side Pane Elements 108
- Figure 51: Side Pane Elements 109
- Getting J-Web Help 111
- J-Web Sessions 112
- CLI Command Hierarchy 113
- Starting the CLI 114
- CLI Operational Mode 114
- CLI Configuration Mode 115
- CLI Basics 116
- Command Completion 117
- Online Help 118
- Table 51: help Commands 119
- Installing a Services Router 123
- Chapter 5 125
- Rack Requirements 126
- Rack Requirements ■ 105 127
- Fire Safety Requirements 128
- Fire Suppression 128
- Fire Suppression Equipment 129
- Signaling Limitations 130
- Radio Frequency Interference 130
- Electromagnetic Compatibility 130
- Router Power Requirements 131
- Figure 54: AC Plug Types 132
- A, and the other power 133
- Planning for Power Management 134
- Network Cable Specifications 137
- ISDN Provisioning 137
- Site Preparation Checklist 137
- Chapter 6 139
- Chassis Grounding 145
- Connecting Power 146
- Connecting AC Power 146
- Connecting Power ■ 125 147
- Connecting DC Power 148
- –48 VDC and RTN 149
- 128 ■ Connecting Power 150
- POWER LED lights during 151
- Chapter 7 153
- Basic Connectivity Overview 154
- Router Identification 154
- Root Password 155
- Time Zone and System Time 155
- Network Settings 155
- Default Gateway 156
- Backup Router 156
- Loopback Address 156
- Management Access 157
- 192.168.1.1 159
- Connecting to the CLI Locally 161
- ■ Bits per second: 9600 162
- ■ Data bits: 8 162
- ■ Parity: None 162
- ■ Stop bits: 1 162
- ■ Flow control: None 162
- 2. Power on the modem 163
- Identification 167
- Configurations on page 150 170
- Verifying Basic Connectivity 172
- Configuring Secure Web Access 175
- Secure Web Access Overview 176
- Generating SSL Certificates 177
- JUNOScript over SSL 180
- [edit] hierarchy level, enter 180
- Verifying Secure Web Access 181
- Chapter 9 183
- Software Feature Licenses 184
- License Key Components 184
- Displaying Installed Licenses 188
- Displaying License Usage 189
- Replacing Hardware Components 193
- Replacing a PIM 194
- Removing a PIM 194
- Replacing a PIM ■ 173 195
- Installing a PIM 196
- Replacing PIM Cables 197
- Removing PIM Cables 197
- Installing PIM Cables 197
- Replacing USB Storage Devices 208
- Replacing DRAM Modules 210
- Removing a DRAM Module 211
- Installing a DRAM Module 212
- POWER LED to turn off 214
- Removing a DC Power Supply 217
- Installing a DC Power Supply 218
- Chapter 11 231
- Returning Hardware 235
- PIM Serial Number Label 238
- Contacting Customer Support 238
- Return Procedure 238
- Tools and Parts Required 239
- Connector Pinouts 245
- RS-232 DTE Cable Pinout 246
- RS-232 DCE Cable Pinout 247
- EIA-530A DTE Cable Pinout 250
- EIA-530A DCE Cable Pinout 251
- V.35 DTE Cable Pinout 252
- V.35 DCE Cable Pinout 253
- X.21 DTE Cable Pinout 253
- X.21 DCE Cable Pinout 254
- Gigabit Ethernet uPIM ports 255
- Chassis Console Port Pinouts 256
- E1 and T1 RJ-48 Cable Pinouts 257
- ISDN RJ-45 Connector Pinout 261
- TGM550 Console Port Pinouts 261
- TIM508 Connector Pinout 263
- TIM510 RJ-45 Connector Pinout 263
- TIM514 Connector Pinout 264
- TIM516 Connector Pinout 264
- TIM518 Connector Pinout 266
- TIM521 Connector Pinout 267
- Information 269
- Qualified Personnel Warning 272
- Grounded Equipment Warning 282
- Power Disconnection Warning 285
- TN Power Warning 286
- Chassis Lifting Guidelines 288
- Ramp Warning 293
- Class 1 Laser Product Warning 294
- Class 1 LED Product Warning 295
- Laser Beam Warning 295
- Battery Handling Warning 298
- Jewelry Removal Warning 299
- Lightning Activity Warning 300
- Operating Temperature Warning 301
- Product Disposal Warning 303
- Agency Approvals 304
- Lithium Battery 305
- European Community 307
- United States 309
- Index on page 291 311
- 290 ■ Index 312
- Index ■ 291 313
- 292 ■ Index 314
- Index ■ 293 315
- 294 ■ Index 316
- Index ■ 295 317
- 296 ■ Index 318
- Index ■ 297 319
- 298 ■ Index 320
- Index ■ 299 321
- 300 ■ Index 322
- Index ■ 301 323
- 302 ■ Index 324
- Index ■ 303 325
- 304 ■ Index 326
- Index ■ 305 327
- 306 ■ Index 328
- Index ■ 307 329
- 308 ■ Index 330
- Index ■ 309 331
- 310 ■ Index 332
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