VRRP is a protocol that dynamically assigns responsibility for routers on a network. In a VRRP setup, one router is elected as the master, with the other routers acting as backups in case of the failure of the master router. In the event of an outage, once the down machine is fixed, it automatically becomes the master again, all without a network administrator having to reconfigure a large number of hosts. Using VRRP, network administrators can ensure that their networks stay up and running and eliminate costly downtime. Cisco, Juniper, Nortel and other networks use VRRP. Importantly, the book contains network configuration examples. Written by experts who helped design the protocol and who have real-world experience deploying it, VRRP is the only book specifically focused on VRRP.
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Zielgruppe
Für höhere Schule und Studium
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Breite: 241 mm
Dicke: 32 mm
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ISBN-13
978-0-201-71500-2 (9780201715002)
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Schweitzer Klassifikation
Ayikudy Srikanth is Director of Software Engineering at Crossbeam Systems, a company specializing in high-performance, highly available open platforms. He is a member of the VRRP working group in the Internet Engineering Task Force (IETF), and coauthored the VRRP over LAN emulation draft. He was the architect of the Nortel Bay series routers' VRRP and manager of the team that implemented it, and holds two patents related to VRRP extensions.
Adnan Adam Onart, former Director of Internetworking software at Fujitsu-Nexion, managed the implementation of the VRRP and the early high-availability strategy development for Nortel Networks' Contivity Extranet Switches group. He has conducted research on formal methods and published books on symbolic logic.
Preface.
Acknowledgments.
I. VRRP IN PERSPECTIVE.
1. Networking, Availability, and VRRP.
Availability and Networking.
Networking and Availability.
Virtual Router Redundancy.
Summary.
2. VRRP Overview.
The Case for VRRP.
Basic Concepts and Configurations.
Load Sharing.
Multiple Backups.
Ownership.
Virtual Routers Without Owner.
One Backup Protecting Two Masters.
Virtual Routers with Multiple IP Addresses.
Failure Cases.
A Few Words About Router Virtuality.
Case Studies.
Summary.
II. A CLOSER LOOK AT VRRP.
3. VRRP Messages.
Message Format.
Message Exchange.
Sniffed Data from VRRP Messages.
Summary.
4. VRRP in Action.
VRRP State Machine.
VRRP State Machine in Motion.
VRRP Operations.
Summary.
5. VRRP and Network Technologies.
VRRP over Ethernet.
VRRP and Learning Bridges.
VRRP over FDDI.
VRRP over Token Ring.
VRRP over ATM LANE.
Summary.
6. VRRP and VPNs.
VRRP and Firewalls.
VRRP and Tunnels.
Trade-Offs in VPN Availability.
Summary.
III. MANAGING VRRP.
7. SNMP Management.
VRRP MIB Organization.
Illustrative Cases.
A Closer Look at the VRRP Operations Table.
Configuring VRRP Operation Tables.
Associated IP Address Table.
A Pseudo Command Set for VRRP Configurations.
VRRP Statistics.
VRRP Notifications.
Browsing SNMP MIB.
SNMP Management of VRRP: Operational Issues.
Summary.
8. VRRP Configuration and Craft Person Interface.
CLI Hierarchy.
Configuration of CLI Commands.
Basic VRRP Configuration.
Monitoring and Troubleshooting Using CLI.
Summary.
9. VRRP Configuration Using a Graphical User Interface.
Nortel Networks' Site Manager.
Configuring VRRP on Nortel Networks Contivity Extranet Switch.
Nortel Networks' Accelar Device Manager.
Monitoring VRRP Using HP Openview.
Summary.
IV. VRRP: PAST AND FUTURE.
10. Precursors to VRRP.
Cisco's HSRP.
Digital Equipment Corporation's IP Standby Protocol.
Summary.
11. Future of VRRP.
Extensions to VRRP.
VRRP for Advanced High Availability.
Future of VRRP: VRRP and IPv6.
Future of High Availability: Clustering and Beyond.
Summary.
V. APPENDIXES.
Appendix A. Networking and TCP/IP Overview.
Layering the Network.
Forwarding the Data.
Controlling the Network.
Securing the Network.
Managing the Network.
Appendix B. VRRP MIB (from RFC 2787).
Appendix C. VRRP in the Public Domain.
Appendix D. SDL Overview and Flowcharts for VRRP.
Graphical Representations.
VRRP State Machine Transitions.
Appendix E. VRRP from a Logical Point of View.
Approach and Notation.
Logical Laws and Equivalences Used in the Discussions.
About Our Formal Perspective.
Concepts.
Protocol Assertions.
Explications for State Machine.
Norms.
List of Symbolic Assertions and Norms.
Appendix F. UML Overview and Diagrams for VRRP.
State Diagrams.
Sequence Diagrams.
VRRP State Diagram.
VRRP Sequence Diagram.
References.
Index. 0201715007T09052002
