1. JUNOS HA Concepts

   1. Chapter 1 High Availability Network Design Considerations

      1. Why Mention Cost in a Technical Book?
      2. A Simple Enterprise Network
      3. Redundancy and the Layered Model
      4. What Does It All Mean?

   2. Chapter 2 Hardware High Availability

      1. Divide and Conquer
      2. Packet Flows
      3. Redundancy and Resiliency

   3. Chapter 3 Software High Availability

      1. Software Architecture
      2. One OS to Rule Them
      3. Automation of Operations

   4. Chapter 4 Control Plane High Availability

      1. Under the Hood of the Routing Engine
      2. Graceful Routing Engine Switchover
      3. Graceful Restart
      4. MPLS Support for Graceful Restart
      5. Non-Stop Active Routing
      6. Non-Stop Bridging
      7. Choosing Your High Availability Control Plane Solution

   5. Chapter 5 Virtualization for High Availability

      1. Virtual Chassis in the Switching Control Plane
      2. Control System Chassis

2. JUNOS HA Techniques

   1. Chapter 6 JUNOS Pre-Upgrade Procedures

      1. JUNOS Package Overview
      2. Pre-Upgrade Verifications
      3. Moving Services Away from a Router

   2. Chapter 7 Painless Software Upgrades

      1. Snapshots
      2. Software Upgrades with Unified ISSU
      3. Software Upgrades Without Unified ISSU
      4. Snapshots Redux
      5. Image Upgrade Tweaks and Options
      6. J Series Considerations

   3. Chapter 8 JUNOS Post-Upgrade Verifications

      1. Post-Upgrade Verification
      2. Fallback Procedures
      3. Applicability

   4. Chapter 9 Monitoring for High Availability

      1. I Love Logs
      2. Simple Network Management Protocol
      3. Traffic Monitoring

   5. Chapter 10 Management Interfaces

      1. A GUI for Junior Techs
      2. Mid-Level Techs and the CLI
      3. Deep Magic for Advanced Techs

   6. Chapter 11 Management Tools

      1. JUNOScope
      2. Juniper AIS
      3. Partner Tools

   7. Chapter 12 Managing Intradomain Routing Table Growth

      1. Address Allocation
      2. Address Aggregation

   8. Chapter 13 Managing an Interdomain Routing Table

      1. Enterprise Size and Effective Management
      2. Border Gateway Protocol (BGP)

3. Network Availability

   1. Chapter 14 Fast High Availability Protocols

      1. Protocols for Optical Networks
      2. Rapid Spanning Tree Protocol
      3. Interior Gateway Protocols
      4. Bidirectional Forwarding Detection
      5. Virtual Router Redundancy Protocol
      6. MPLS Path Protection

   2. Chapter 15 Transitioning Routing and Switching to a Multivendor Environment

      1. Industry Standards
      2. Multivendor Architecture for High Availability
      3. Routing Protocol Interoperability

   3. Chapter 16 Transitioning MPLS to a Multivendor Environment

      1. Multivendor Reality Check
      2. MPLS Signaling for High Availability
      3. MPLS Transition Case Studies

   4. Chapter 17 Monitoring Multivendor Networks

      1. Are You In or Out?
      2. SNMP Configuration
      3. Syslog Configuration
      4. Configuration Management
      5. Configuration for AAA
      6. JUNOS GUI Support
      7. What IS Normal?

   5. Chapter 18 Network Scalability

      1. Hardware Capacity
      2. Network Scalability by Design

   6. Chapter 19 Choosing, Migrating, and Merging Interior Gateway Protocols

      1. Choosing Between IS-IS and OSPF
      2. Migrating from One IGP to Another
      3. Merging Networks Using a Common IGP

   7. Chapter 20 Merging BGP Autonomous Systems

      1. Planning the Merge
      2. Merging Our ASs Off
      3. Monitoring the Merge

   8. Chapter 21 Making Configuration Audits Painless

      1. Why Audit Configurations?
      2. Configuration Auditing 101
      3. Auditing Configurations
      4. Performing and Updating Audits

   9. Chapter 22 Securing Your Network Equipment Against Security Breaches

      1. Authentication Methods
      2. Hardening the Device
      3. Firewall Filters

   10. Chapter 23 Monitoring and Containing DoS Attacks in Your Network

       1. Attack Detection
       2. Taking Action When a DoS Attack Occurs
       3. Attack Prevention
       4. Gathering Evidence

   11. Chapter 24 Goals of Configuration Automation

       1. CLI Configuration Automation
       2. Automating Remote Configuration

   12. Chapter 25 Automated Configuration Strategies

       1. Configuration Change Types
       2. Automation Strategies

4. Appendixes

   1. Appendix System Test Plan

      1. Physical Inspection and Power On
      2. Check General System Status
      3. Check Routing Engine and Storage Media
      4. Test Optical Interfaces
      5. Failover and Redundancy Tests
      6. Final Burn-In Check

   2. Appendix Configuration Audit

      1. Audit Responsibilities
      2. Audit Response Key
      3. Audit Checklist
      4. Audit Interval

   3. Appendix High Availability Configuration Statements

      1. Routing Engine and Switching Control Board
      2. Graceful Routing Engine Switchover
      3. Nonstop Bridging Statements
      4. Nonstop Active Routing
      5. Graceful Restart
      6. VRRP
      7. Unified In-Service Software Upgrade (ISSU)

1. Colophon

The animals on the cover of JUNOS High Availability are Bohemian waxwings (Bombycilla garrulus). The generic name Bombycilla, Latin for "silk tail," describes the bird's sleek, soft plumage. Waxwing refers to the red tips of the wing feathers that resemble drops of wax. Three species of waxwings exist: Japanese, Cedar, and Bohemian. These species are fairly similar in appearance and are primarily distinguished by geography: the Japanese waxwing lives exclusively in Asia; the Cedar inhabits North America; and the Bohemian--true to its name--travels throughout the sub-Arctic continents in nomadic flocks, particularly in winter as it searches for berries. The two latter waxwings have the most in common, although Cedars are more prevalent in the northeastern United States, whereas Bohemians are numerous in western Canada and the Rocky Mountain region. All three waxwings subsist on a diet of fruit and insects.

Another difference between the species is seen in the edges of the wing feathers: Bohemian and Japanese waxwings have white edges, while Cedars do not. At six to nine inches long, the Bohemian is also larger and grayer than the Cedar, although both have yellow tail feather tips and a pointed crest. The Bohemian waxwing's call is extremely similar to the Cedar's, most likely because the Bohemian has no territory to defend and thus has never needed to develop a true song.

The cover image is from the Dover Pictorial Archive. The cover font is Adobe ITC Garamond. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSansMonoCondensed.