Juniper E120 - RELEASE 11.1.X HARDWARE GUIDE 3-25-2010, E120, E320 Hardware Manual
E Series™ Broadband Services Routers
E120 and E320 Hardware Guide
Release 11.1.x
Juniper Networks, Inc.
1194 North Mathilda Avenue
Sunnyvale, California 94089
USA
408-745-2000
www.juniper.net
Published: 2010-03-25
Juniper Networks, the Juniper Networks logo, JUNOS, NetScreen, ScreenOS, and Steel-Belted Radius are registered trademarks of Juniper Networks, Inc. in
the United States and other countries. JUNOSe is a trademark of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or
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Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or
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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.
E Series™ Broadband Services Routers E120 and E320 Hardware Guide, Release 11.1.x
Copyright © 2010, Juniper Networks, Inc.
All rights reserved. Printed in USA.
Writing: Subash Babu Asokan, John Borelli
Editing: Ben Mann
Illustration: John Borelli
Cover Design: Edmonds Design
Revision History
April 2010—FRS JUNOSe 11.1.x
The information in this document is current as of the date listed in the revision history.
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ii ■
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■ iii
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vi ■
Table of Contents
About the Documentation xiii
E Series and JUNOSe Documentation and Release Notes ..............................xiii
Audience ......................................................................................................xiii
E Series and JUNOSe Text and Syntax Conventions ......................................xiii
Obtaining Documentation .............................................................................xv
Documentation Feedback ..............................................................................xv
Requesting Technical Support ........................................................................xv
Self-Help Online Tools and Resources ....................................................xvi
Opening a Case with JTAC ......................................................................xvi
Part 1 Product Overview
Chapter 1 E120 and E320 Overview 3
System Description .........................................................................................3
Chassis Overview ............................................................................................3
E320 Model ..............................................................................................4
E120 Model ..............................................................................................6
E120 and E320 Modules ..................................................................................7
SRP Module ..............................................................................................7
Module Details ....................................................................................8
Nonvolatile Storage ............................................................................9
SFM Module ..............................................................................................9
Fabric Slices .....................................................................................10
SRP IOA ..................................................................................................10
Module Details ..................................................................................10
Line Modules ..........................................................................................11
Packet Classification .........................................................................12
I/O Adapters ...........................................................................................12
Network Management Tools ..........................................................................13
CLI Management .....................................................................................13
SNMP MIB Management .........................................................................13
Redundancy Features ....................................................................................14
SRP Modules ...........................................................................................14
NVS Cards ........................................................................................14
Power .....................................................................................................14
Fans ........................................................................................................14
Table of Contents ■ vii
E120 and E320 11.1.x Hardware Guide
Part 2 Initial Installation
Chapter 2 Unpacking and Inspecting the Router 19
Before You Begin ...........................................................................................19
Unpacking the Router ....................................................................................19
Inspecting Router Components and Accessories ...........................................20
If You Detect or Suspect Damage ..................................................................21
Contacting Juniper Networks .........................................................................21
The Next Step ................................................................................................21
Chapter 3 Installing the Router 23
Before You Begin ...........................................................................................23
Freestanding Installation ...............................................................................23
Rack-Mounted Installation .............................................................................25
Installation Guidelines .............................................................................25
Preparing the Equipment Racks ..............................................................26
Installing the Router ................................................................................26
The Next Step ................................................................................................26
Chapter 4 Installing Modules 27
Overview .......................................................................................................27
Slot Numbering .......................................................................................30
IOA Slot Combinations ............................................................................32
Module Combinations .............................................................................34
IOAs Requiring SFPs ...............................................................................35
Proper Handling of ES2 4G LMs ..............................................................35
ES2 10G Uplink Line Modules .................................................................36
Managing Modules Using the Software ...................................................36
Order of Installation ................................................................................36
Hot-Swapping Modules ...........................................................................37
Protecting Modules and Slots ..................................................................37
Required Tools and Safety Items .............................................................38
Safety Guidelines ...........................................................................................38
Installing an SRP Module or SFM Module ......................................................38
Installing an IOA Shelf ...................................................................................40
Installing a Line Module or an IOA ................................................................41
Removing Modules and IOAs ........................................................................42
Installing and Removing SFPs .......................................................................44
Installing SFPs .........................................................................................44
Removing SFPs .......................................................................................45
The Next Step ................................................................................................46
viii ■ Table of Contents
Table of Contents
Chapter 5 Cabling the Router 47
Cabling Overview ..........................................................................................47
Required Tools, Wires, and Cables ................................................................48
Cabling the SRP IOA ......................................................................................49
Network Timing Ports .............................................................................50
Management Ports ..................................................................................51
Connecting to the Network ...............................................................51
Connecting to a Console Terminal ....................................................51
Cabling IOAs .................................................................................................51
LC Duplex Connectors ............................................................................52
SFPs ........................................................................................................52
Cabling the Router for Power ........................................................................52
Task 1: Turn Off All Router Power ..........................................................54
Task 2: Connect the Grounding Cables ....................................................54
Task 3: Connect the Power Cables ..........................................................55
The Next Step ................................................................................................56
Chapter 6 Powering Up the Router 57
Before You Power Up the System ..................................................................57
Powering Up .................................................................................................57
Initialization Sequence ............................................................................58
Status LEDs ...................................................................................................58
Powering Down .............................................................................................59
The Next Step ................................................................................................59
Chapter 7 Accessing E Series Routers 61
Setting Up Management Access .....................................................................61
Console Port Setup ........................................................................................61
Using HyperTerminal ..............................................................................62
Connecting Directly to the Router ...........................................................62
Assigning an IP Address ..........................................................................63
Telnet Setup ..................................................................................................64
SNMP ............................................................................................................65
The Next Step ................................................................................................66
Part 3 Hardware Maintenance, Replacement, and Troubleshooting
Procedures
Chapter 8 Maintaining the Router 69
Required Tools and Items ..............................................................................69
Storing Modules and Components .................................................................69
Table of Contents ■ ix
E120 and E320 11.1.x Hardware Guide
Cleaning the System ......................................................................................70
Upgrading NVS Cards on SRP Modules ..........................................................70
Upgrading a System That Contains One SRP Module ..............................71
Upgrading a System That Contains Two SRP Modules ............................71
Replacing an NVS Card ..................................................................................72
Replacing Fan Trays ......................................................................................73
Removing an E320 Fan Tray ...................................................................74
Installing an E320 Fan Tray ....................................................................74
Installing an Air Filter ....................................................................................75
Replacing a Power Distribution Unit ..............................................................76
Chapter 9 Troubleshooting 79
Diagnosing Problems ....................................................................................79
Initialization Sequence ............................................................................79
Troubleshooting Power Failures ....................................................................80
Understanding Status LEDs to Troubleshoot ..................................................80
LED Identification ...................................................................................80
LED Activity ............................................................................................83
Monitoring Temperatures of Modules ............................................................85
Resetting Line Modules and SRP Modules .....................................................86
Double-Bit Errors on SRP Modules .................................................................86
Detecting Double-Bit Errors ....................................................................87
Fixing Double-Bit Errors ..........................................................................87
Part 4 Appendixes
Appendix A System Specifications 91
E120 Broadband Services Router Specifications ............................................91
E320 Broadband Services Router Specifications ............................................93
Router Power Requirements .........................................................................94
Appendix B Installation Guidelines and Requirements 97
Your Preinstallation Responsibilities ..............................................................97
Environmental Requirements ........................................................................97
Regulatory Compliances ................................................................................98
Safety Guidelines ...........................................................................................98
Equipment Rack Requirements .....................................................................99
Mechanical Requirements .......................................................................99
Space Requirements .............................................................................100
Proper Rack Installation ........................................................................100
Cabling Recommendations ..........................................................................101
Product Reclamation and Recycling Program ..............................................102
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Table of Contents
Hardware Compliance .................................................................................103
Federal Communications Commission (FCC) Statement .......................103
FCC Requirements for Consumer Products ...........................................104
Food and Drug Administration, Center for Devices and Radiological
Health ............................................................................................104
Canadian Department of Communications Radio Interference
Regulations .....................................................................................104
Réglement sur le brouillage radioélectrique du ministère des
communications .............................................................................104
Industry Canada Notice CS-03 ..............................................................104
Avis CS-03 d'Industrie Canada ..............................................................105
D.O.C. Explanatory Notes: Equipment Attachment Limitations ............106
Notes explicatives du ministère des Communications: limites visant les
accessoires .....................................................................................106
EC Declaration of Conformity ...............................................................107
Voluntary Control Council for Interference (VCCI) Statement for
Japan ..............................................................................................107
Appendix C Cable Pinouts 109
SRP IOA ......................................................................................................109
Appendix D Contacting Customer Support and Returning Hardware 113
Contacting Customer Support ......................................................................113
Return Procedure ........................................................................................113
Locating Component Serial Numbers ..........................................................114
Information You Might Need to Supply to JTAC ...........................................115
Tools and Parts Required ............................................................................116
Returning Products for Repair or Replacement ...........................................116
Packing Instructions for Returning a Chassis .........................................116
Appendix E Declaration of Conformity 119
Declaration of Conformity – E120 Broadband Services Router ....................119
Declaration of Conformity – E320 Broadband Services Router ....................120
Part 5 Index
Index ...........................................................................................................123
Table of Contents ■ xi
E120 and E320 11.1.x Hardware Guide
xii ■ Table of Contents
About the Documentation
■ E Series and JUNOSe Documentation and Release Notes on page xiii
■ Audience on page xiii
■ E Series and JUNOSe Text and Syntax Conventions on page xiii
■ Obtaining Documentation on page xv
■ Documentation Feedback on page xv
■ Requesting Technical Support on page xv
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 xiv defines notice icons used in this documentation.
E Series and JUNOSe Documentation and Release Notes ■ xiii
E120 and E320 11.1.x Hardware Guide
Table 1: Notice Icons
Table 2 on page xiv defines text and syntax conventions that we use throughout the
E Series and JUNOSe documentation.
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: Text and Syntax Conventions
Represents commands and keywords in text.Bold text like this
Bold text like this
Fixed-width text like this
Represents text that the user must type.
Represents information as displayed on your
terminal’s screen.
Italic text like this
Emphasizes words.
■
Identifies variables.
■
Identifies chapter, appendix, and book
■
names.
Plus sign (+) linking key names
keys simultaneously.
Syntax Conventions in the Command Reference Guide
ExamplesDescriptionConvention
Issue the clock source command.
■
Specify the keyword exp-msg.
■
host1(config)#traffic class low-loss1
host1#show ip ospf 2
Routing Process OSPF 2 with Router
ID 5.5.0.250
Router is an Area Border Router
(ABR)
There are two levels of access: user and
■
privileged.
clusterId, ipAddress.
■
Appendix A, System Specifications
■
Press Ctrl + b.Indicates that you must press two or more
terminal lengthRepresents keywords.Plain text like this
| (pipe symbol)
xiv ■ E Series and JUNOSe Text and Syntax Conventions
mask, accessListNameRepresents variables.Italic text like this
diagnostic | lineRepresents a choice to select one keyword
or variable to the left or to the right of this
symbol. (The keyword or variable can be
either optional or required.)
Table 2: Text and Syntax Conventions (continued)
About the Documentation
ExamplesDescriptionConvention
[ internal | external ]Represent optional keywords or variables.[ ] (brackets)
[ ]* (brackets and asterisk)
that can be entered more than once.
Represent required keywords or variables.{ } (braces)
Obtaining Documentation
To obtain the most current version of all Juniper Networks technical documentation,
see the Technical Documentation page on the Juniper Networks Web site at
http://www.juniper.net/.
To download complete sets of technical documentation to create your own
documentation CD-ROMs or DVD-ROMs, see the Offline Documentation page at
http://www.juniper.net/techpubs/resources/cdrom.html
Copies of the Management Information Bases (MIBs) for a particular software release
are available for download in the software image bundle from the Juniper Networks
Web site athttp://www.juniper.net/.
Documentation Feedback
[ level1 | level2 | l1 ]*Represent optional keywords or variables
{ permit | deny } { in | out }
{ clusterId | ipAddress }
We encourage you to provide feedback, comments, and suggestions so that we can
improve the documentation to better meet your needs. Send your comments to
techpubs-comments@juniper.net, or fill out the documentation feedback form at
https://www.juniper.net/cgi-bin/docbugreport/. If you are using e-mail, be sure to include
the following information with your comments:
■ Document or topic name
■ URL or page number
■ Software release version
Requesting Technical Support
Technical product support is available through the Juniper Networks Technical
Assistance Center (JTAC). If you are a customer with an active J-Care or JNASC support
contract, or are covered under warranty, and need post-sales technical support, you
can access our tools and resources online or open a case with JTAC.
■ JTAC policies—For a complete understanding of our JTAC procedures and policies,
review the JTAC User Guide located at
http://www.juniper.net/customers/support/downloads/7100059-EN.pdf .
Obtaining Documentation ■ xv
E120 and E320 11.1.x Hardware Guide
■ Product warranties—For product warranty information, visit
http://www.juniper.net/support/warranty/ .
■ JTAC hours of operation—The JTAC centers have resources available 24 hours a
day, 7 days a week, 365 days a year.
Self-Help Online Tools and Resources
For quick and easy problem resolution, Juniper Networks has designed an online
self-service portal called the Customer Support Center (CSC) that provides you with
the following features:
■
Find CSC offerings: http://www.juniper.net/customers/support/
■
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xvi ■ Requesting Technical Support
Part 1
Product Overview
■ E120 and E320 Overview on page 3
Product Overview ■ 1
E120 and E320 11.1.x Hardware Guide
2 ■ Product Overview
Chapter 1
E120 and E320 Overview
This chapter provides introductory information about the Juniper Networks E120
and E320 Broadband Services Routers. It contains the following sections:
■ System Description on page 3
■ Chassis Overview on page 3
■ E120 and E320 Modules on page 7
■ Network Management Tools on page 13
■ Redundancy Features on page 14
System Description
E Series routers are modular, carrier-class networking devices that deliver
performance, reliability, and service differentiation to both enterprise and residential
Internet users. The E120 router and E320 router are next-generation, high-capacity
additions to the E Series product family offering high-port density and high bandwidth
in a fully redundant system, supporting evolving IP-based broadband services. The
E120 router supports the same services as the E320 router, but with smaller capacity
and scaling capabilities for smaller configurations.
Chassis Overview
The routers utilize the same JUNOSe™ software architecture and provide a single IP
entry point into the service provider network with the same IP-based protocols and
services that are available on existing E Series products. They address a wide range
of edge applications, including subscriber management (including 802.11 hotspots),
video on demand, Voice over IP (VoIP), Metro Ethernet, customer circuit aggregation,
virtual private networks (VPNs), and wholesale services.
E Series routers offer the complete edge solution for IP-optimized carriers.
Two models are available:
■ E120 router
■ E320 router
Both models use the same software and share a system architecture and common
components:
System Description ■ 3
E120 and E320 11.1.x Hardware Guide
■ Switch route processors (SRPs)—Perform system management, routing table
calculations maintenance, forwarding table computations, and other control
plane functions
■ Switch fabric modules (SFMs)—Create a distributed shared memory switching
fabric
■ Line modules (LMs)—Are frame processing and forwarding engines for IOAs
■ Input/output adapter (IOA)—Provide the physical connection to the network via
10–Gigabit Ethernet, Ethernet, ATM, and Packet over SONET (PoS) interfaces
■ Power modules—Distribute redundant power feeds through the system to all
components
E320 Model
A fully configured E320 router consists of 2 switch route processors (SRPs), 3 switch
fabric modules (SFMs), 12 line modules, and up to 2 I/O adapters (IOAs) per line
module. See Figure 1 on page 5 and Figure 2 on page 5.
An IOA shelf (bracket) can be installed on a slot-by-slot basis to create an upper IOA
bay and lower IOA bay, enabling you to use up to two IOAs in the same slot. This
architecture enables you to combine different IOA types in the same slot and to
support oversubscribed configurations.
NOTE: The routers illustrated in this book might look different than your router due
to configuration variations.
4 ■ Chassis Overview
Figure 1: E320 Router, Front View
Chapter 1: E120 and E320 Overview
Figure 2: E320 Router, Rear View
Chassis Overview ■ 5
E120 and E320 11.1.x Hardware Guide
E120 Model
A fully configured E120 router consists of 2 switch route processors (SRPs), 3 switch
fabric modules (SFMs), 6 line modules, and up to 2 I/O adapters (IOAs) per line
module. See Figure 3 on page 6 and Figure 4 on page 7.
An IOA shelf (bracket) can be installed on a slot-by-slot basis to create a left and right
IOA bay, enabling you to use up to two IOAs in the same slot. This architecture
enables you to combine different IOA types in the same slot and to support
oversubscribed configurations. Air is pulled in from the right of the router by the fan
tray and is exhausted out the left side.
NOTE: The routers illustrated in this book might look different than your router due
to configuration variations.
Figure 3: E120 Router, Front View
6 ■ Chassis Overview
Figure 4: E120 Router, Rear View
Chapter 1: E120 and E320 Overview
E120 and E320 Modules
The routers support SRP modules, SFM modules, line modules, and IOAs. You can
use a line module for access or uplink. Access line modules receive traffic from
low-speed circuits, and the system routes the traffic onto higher-speed uplink line
modules and then to the core of the network. Line modules act as frame forwarding
engines for the physical interfaces (the IOAs) via a passive midplane.
Most line modules, IOAs, SFMs, and SRP modules can be installed in either router.
There are a few exceptions, however:
■ Similar-capacity modules must be used in the same router. For example, you
cannot install an SRP-100 in a router that contains an SFM-320. You can only
use a SRP–100 module with a SFM-100 module.
■ Higher-capacity SRP modules can be used in lower-capacity routers, but
lower-capacity SRP modules cannot be used in high-capacity routers. For example,
an SRP-320 can be used in an E120 router, but an SRP-120 cannot be used in
an E320 router.
■ The SRP-100 module and the SFM-100 module are not supported in the E120
router.
See the E120 and E320 Module Guide for module and chassis compatibility.
The front panel of each module contains a collection of status LEDs (light-emitting
diodes). For information about how to interpret the LEDs, see “Troubleshooting” on
page 79. For complete module specifications, see the E120 and E320 Module Guide.
SRP Module
Switch route processor (SRP) modules perform system management, routing table
calculations and maintenance, forwarding table computations, statistics processing,
configuration storage, and other control plane functions. The SRP module identifies
E120 and E320 Modules ■ 7
E120 and E320 11.1.x Hardware Guide
which line modules are physically present in the chassis and monitors and controls
vital functions on the line modules.
Each SRP module (Figure 5 on page 8) is a PowerPC-based system with its own
memory, nonvolatile storage (NVS), and power converter. The SRP module works
with the SFM modules and contains a switch fabric slice common to both modules.
See “Fabric Slices” on page 10 for more information.
NOTE: Because of different physical dimensions and switch fabric capabilities, SRP
modules are not interchangeable between all routers. For example, the SRP–100
used in the E320 router cannot be used in other E Series routers, and vice versa. See
the E120 and E320 Module Guide for SRP module compatibility.
Figure 5: Representative SRP Module
Module Details
An SRP module must be present for the router to boot. The routers support up to
two redundant SRP modules operating in an active/standby configuration. The
redundant SRP module takes control when a failover occurs. See “Redundancy
Features” on page 14 and the E120 and E320 Module Guide for more SRP module
information.
CAUTION: Do not remove the SRP module while the system is running, unless you
have properly issued the halt command. See JUNOSe System Basics Configuration
Guide, Chapter 6, Managing Modules for information about the halt commands.
8 ■ E120 and E320 Modules
Chapter 1: E120 and E320 Overview
NOTE: You cannot use SRP modules of different capacities in the same configuration.
For example, you cannot install a SRP-100 module and a SRP-320 module in the
same router.
For details about installing SRP modules, see “Installing Modules” on page 27.
Nonvolatile Storage
Depending on the model, each SRP module has either two Type II PCMCIA nonvolatile
storage (NVS) cards or two ATA flash cards (0, 1). (See Figure 5 on page 8.) One
card is loaded with the system's software and configuration files while the other card
holds core dumps. The NVS cards in the active SRP module are designated disk0 and
disk1. The NVS cards in the redundant SRP module are designated standby-disk0
and standby-disk1. The PCMCIA card is factory installed.
SFM Module
CAUTION: Before you insert or remove flash cards from a running router, we strongly
recommend that you halt the SRP module or shut down the router. Failure to do this
can result in file corruption in one or both cards. See “Replacing an NVS Card” on
page 72 for more information.
The switch fabric modules (SFMs) work with the SRP module to create a shared
memory fabric for the router. Each SFM module (Figure 6 on page 9) has its own
memory and power converter. Like the SRP module, the SFM module contains a
fabric system processor board (slice). See “Fabric Slices” on page 10.
NOTE: You must use a SRP module that corresponds with the fabric type (SFM
module) that is installed. For example, you can only use a SRP–100 module with a
SFM-100 module. You cannot use a SRP–100 module with a SFM-320 module.
Figure 6: SFM Module
E120 and E320 Modules ■ 9
E120 and E320 11.1.x Hardware Guide
Fabric Slices
The router's switch fabric is distributed across two SRP modules and three SFM
modules. Each module has a fabric slice on it. For the router to operate, at least four
of the five slices must be operational.
When all five modules are installed, the fabric slice of the standby SRP acts as a
redundant module. For example, the router can operate with:
■ Two SRP modules (the second of which is redundant) and three SFM modules
■ One SRP module (non-redundant) and three SFM modules
■ Two SRP modules and two SFM modules
NOTE: You cannot use SFM modules of different capacities in the same configuration.
For example, you cannot install a SFM-100 module and a SFM-320 module in the
same router.
SRP IOA
The SRP I/O adapter (IOA) is a single input/output adapter that interfaces with the
SRP modules through the system's midplane. See Figure 2 on page 5 and Figure 4
on page 7 for its location.
Module Details
The SRP IOA provides standard management interfaces, including:
■ 10/100Base-T—The port enables access to the router for Ethernet management
functions through Telnet, Secure Shell Server (SSH), command-line interface
(CLI), or Simple Network Management Protocol (SNMP), for example.
■ RS-232—One port (console) provides a serial connection for monitoring the
system's hardware configuration through a PC (running terminal emulation
software) or ASCII terminal and enables direct CLI access. The second port
(auxiliary) provides access to debug ports on specific processors (SRP module,
line module). Juniper Networks customer support engineers use the auxiliary
port. We recommend that users do not use the auxiliary port.
■ External timing inputs—The BNC connectors provide a method of ensuring that
the clock timing used by the router remains synchronized with the network's
system clock.
You can hot-swap SRP IOAs. Hot-swapping enables you to add or remove SRP IOAs
without powering down the system. When you complete hot-swapping an SRP IOA,
its MAC address in the subnet is automatically refreshed without rebooting the SRP
or the chassis. Also, you can re-insert an SRP IOA that you had taken out previously
to the same network without refreshing the MAC address of the SRP IOA.
10 ■ E120 and E320 Modules
Chapter 1: E120 and E320 Overview
NOTE: Hot-swapping an SRP IOA is unsupported during a unified in-service software
upgrade (ISSU).
If you have configured RADIUS server on an SRP IOA that you want to replace, you
can perform either of the following actions to prevent loss of accounting or logout
information:
■ Disable accounting and, when there is no subscriber login or logout activity,
hot-swap SRP IOA.
■ Increase the timeout value of the RADIUS server configured depending on the
time used for IOA replacement. The maximum timeout value is 1000 seconds.
After you complete hot-swapping the SRP IOA, you can use the show version all
command to display the state of the SRP IOA.
The SRP IOA hot-swapping is supported on the following routers:
Line Modules
■ E320 router with SRP-100 or SRP-320
■ E120 router
NOTE: You must complete the hot-swapping of the SRP IOA within 1800 seconds.
For details about installing the SRP IOA, see “Installing Modules” on page 27.
Line modules (LMs) act as frame forwarding engines for the physical interfaces (the
IOAs) and process data from different types of network connections. For information
about available line modules, and which SRP modules support specific line modules,
see the E120 and E320 Module Guide.
Figure 7 on page 12 shows a representative line module. For details about installing
line modules, see “Installing Modules” on page 27.
E120 and E320 Modules ■ 11
E120 and E320 11.1.x Hardware Guide
Figure 7: Representative Line Module
I/O Adapters
Packet Classification
The line module supports packet classification on ingress. A classification engine on
the line module matches specific fields (such as source and destination IP address,
source and destination port, and protocol), the ingress IP interface, layer 2 fields, or
some combination of these against user-configured filters at wire speed.
Most input/output adapters (IOA) provide the physical interconnection to the network
via small form-factor pluggable transceivers (SFPs). You insert each IOA into the
passive midplane in the rear of the chassis, directly behind a line module. See Figure
2 on page 5 for IOA location in the router and Figure 8 on page 13 for a
representative IOA model. See “Installing and Removing SFPs” on page 44 and the
E120 and E320 Module Guide for information on SFPs.
For a list of hot-swappable IOAs, see Table 4 on page 32.
12 ■ E120 and E320 Modules
Figure 8: Representative IOA
Chapter 1: E120 and E320 Overview
An IOA bracket can be installed to create upper and lower IOA bays (E320 router)
or left and right IOA bays (E120 router), enabling you to use two IOAs in the same
slot. This architecture enables you to combine different IOA types in the same slot
and to support oversubscribed configurations.
Restrictions exist concerning which IOAs can be combined in the same slot and
which bay (upper or lower, left or right) they may be installed in. See “IOA Slot
Combinations” on page 32 and the E120 and E320 Module Guide for information. For
details about installing IOAs, see “Installing Modules” on page 27.
Network Management Tools
You can use different management tools to configure the system to meet the specific
networking requirements.
CLI Management
The command-line interface (CLI) provides fully developed and automated
configuration and status functionality through a local RS-232 port, Telnet, or SSH
over any reachable network. For a full discussion of the CLI, see JUNOSe System Basics
Configuration Guide, Chapter 2, Command-Line Interface.
SNMP MIB Management
The system offers a complete SNMP interface for configuration, status, and alarm
reporting. The system supports both Standard and Enterprise MIBs (Management
Information Bases). The Juniper Networks E Series Enterprise MIB is ASN.1 notated
for easy importing into third-party SNMP management applications. For more
information, see JUNOSe System Basics Configuration Guide, Chapter 4, Configuring
SNMP.
Network Management Tools ■ 13
E120 and E320 11.1.x Hardware Guide
Redundancy Features
This section describes system redundancy features.
SRP Modules
The router uses a 1:1 redundancy scheme for the SRP module. When two SRP
modules are installed in the router, one acts as the primary (active) and the second
as a redundant (standby) module. Both SRP modules share a single SRP IOA located
in the rear of the chassis. After you install two SRP modules, the modules negotiate
for the primary role. A number of factors determine which module becomes the
primary; however, preference is given to the module in the lower-numbered slot.
The SRP modules record their latest roles and retain them the next time you power
up the system.
If the standby SRP module detects that the primary SRP module is not active (and
high-availability mode is not enabled), it reboots the system and takes control. If
high-availability mode has been enabled, automatic switchover occurs with near
hitless failover. For information about configuring and managing SRP module
redundancy, see JUNOSe System Basics Configuration Guide, Chapter 6, Managing
Modules.
Power
Fans
NVS Cards
Each SRP module has two NVS cards (0, 1). The NVS cards in the active SRP module
are designated disk0 and disk1. The NVS cards in the redundant SRP module are
designated standby-disk0 and standby-disk1. After you install new NVS cards or SRP
modules, you must issue the synchronize command to match the file system of the
NVS card on the redundant SRP module with the file system of the NVS card on the
active SRP module. See “Replacing an NVS Card” on page 72 for more information.
The routers provide a power architecture that distributes redundant –48 VDC feeds
through the router to each line module, IOA, SRP module, SFM module, and fan
module where DC-to-DC converters provide local conversion to the required secondary
voltages.
The E320 router employs a bottom-to-top cooling system to keep the temperature
of the modules and components within normal operating limits. Eight cooling fans
are located in a tray at the top of the router. (See Figure 1 on page 5 and Figure 2
on page 5.) Air is pulled in from the front of the router at the bottom and is
exhausted out the top.
The E120 router employs a right-to-left cooling system. Nine cooling fans are located
in a tray at the left of the router. (See Figure 3 on page 6.) Air is pulled in from the
right of the router and is exhausted out the left.
14 ■ Redundancy Features
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