Border Gateway Protocol (BGP) is first and foremost a policy control tool. Unlike the traditional IP routing protocols that are used to exchange routing information within an autonomous system, BGP is traditionally used to exchange routing information between routing domains or autonomous systems. However, BGP can also be used to exchange routing information within a single routing domain. The core ROUTE exam objective covered in this chapter is:
- Implement an eBGP based solution, given a network design and a set of requirements
This chapter contains the following sections:
- An Introduction to Border Gateway Protocol
- Border Gateway Protocol Characteristics
- Border Gateway Protocol AS Numbering System
- Connecting to Internet Service Providers
- Receiving Routes from Internet Service Providers
- Border Gateway Protocol Messages
- Establishing Border Gateway Protocol Adjacencies
- Border Gateway Protocol Attributes
- Border Gateway Protocol Loop Prevention
- The BGP Path Selection Process
- Enabling BGP in Cisco IOS
- Configuring and Verifying External BGP
- Configuring and Verifying Internal BGP
- Advertising Routes with Border Gateway Protocol
- Chapter Summary