Autor/en: Iljitsch van Beijnum
Building Reliable Networks with the Border Gateway Protocol.
11. September 2002 - kartoniert - 290 Seiten
Border Gateway Protocol (BGP) is the routing protocol used to exchange routing information across the Internet. It makes it possible for ISPs to connect to each other and for end-users to connect
to more than one ISP. BGP is the only protocol that is designed to deal with a network of the Internet's size, and the only protocol that can deal well with having multiple connections to unrelated routing domains.
This book is a guide to all aspects of BGP: the protocol, its configuration and operation in an Internet environment, and how to troubleshooting it. The book also describes how to secure BGP, and how BGP can be used
as a tool in combating Distributed Denial of Service (DDoS) attacks. Although the examples throughout this book are for Cisco routers, the techniques discussed can be applied to any BGP-capable router.
topics include: Requesting an AS number and IP addresses
Route filtering by remote ISPs and how to avoid this
Configuring the initial BGP setup
Balancing the available incoming or outgoing traffic over the available connections
Securing and troubleshooting BGP
BGP in larger networks: interaction with internal routing
protocols, scalability issues
BGP in Internet Service Provider networks
The book is filled with numerous configuration examples with more complex case studies at the end of the book
to strengthen your understanding. BGP is for anyone interested in creating reliable connectivity to the Internet.
1. The Internet, Routing, and BGP Topology of the I; nternet TCP/IP Design Philosophy Routing P; rotocols Multihoming; 2. IP Addressing and the BGP Protocol IP Addresses; Interdomain Routing History The BGP Protoc; ol Multiprotocol BGP Interior Routing Prot; ocols; 3. Physical Design Considerations Availability ; Selecting ISPs Bandwidth Router Hardware Failure Risks Building a Wide Area Netw; ork Network Topology Design; 4. IP Address Space and AS Numbers The Different Types of Address Space Requesting Address Space ; Renumbering IP Addresses The AS Number; Routing Registries Routing Policy Specification Language; 5. Getting Started with BGP Enabling BGP Mo; nitoring BGP Clearing BGP Sessions Filteri; ng Routes Internal BGP The Internal Network Minimizing the Impact of Link Failures e; BGP Multihop; 6. Traffic Engineering Knowing Which Route Is Best ; Route Maps Setting the Local Preference; Manipulating Inbound AS Paths Inbound Commun; ities BGP Load Balancing Traffic Engineeri; ng for Incoming Traffic Setting the MED An; nouncing More Specific Routes Queuing, Traffic Shaping, and Policing; 7. Security and Integrity of the Network Passwords ; and Security Software Protecting BGP ; Denial-of-Service Attacks; 8. Day-to-Day Operation of the Network The Network ; Operations Center NOC Hardware Facilities ; SNMP Management Router Names General IP Network Management; 9. When Things Start to Go Down: Troubleshooting Keeping a Clear Head Managing the Troubleshooting Process Dealing with Service Providers Physical and Datalink Layer Problems Routing and Reachability Problems Black Holes DNS Problems; 10. BGP in Larger Networks Peer Groups Using Loopback Addresses for iBGP iBGP Scaling; Dampening Route Flaps OSPF as the IGP Traffic Engineering in the Internal Network Network Partitions; 11. Providing Transit Services Route Filters ; Communities Anti-DoS Measures Customers; with Backup Connections Providing IPv6 and Multicast; 12. Interconnecting with Other Networks Peering ; Internet Exchanges, NAPs, and MAEs Connecting; to an Internet Exchange Connecting to More Exchange Points Rejecting Unwanted Traffic IX Subnet Problems Talking to Other Network Operators; Exchange Point Future; A. Cisco Configuration Basics; B. Binary Logic, Netmasks, and Prefixes; C. Notes on the IPv4 Address Space.
Iljitsch van Beijnum has been working with BGP in ISP and end-user networks since 1996. He has configured the protocol on single-router networks; networks with several hundred Ciscos ranging from the slowest to the fastest available; and multivendor environments with BGP running on Cisco and Juniper routers, Extreme switches, and FreeBSD hosts running GNU Zebra (Quagga wasn't yet invented then). These days he's also into IPv6.