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Routing TCP/IP, Volume II (CCIE Professional Development) by Jeff Doyle, Jennifer DeHaven Carroll

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Large-Scale BGP

Large-scale BGP is something of a subjective term. You decide when your BGP topology grows large enough to justify the use of the tools discussed in this section. As a rule, however, peer groups and communities are used in moderate-sized to larger internetworks. Route reflectors can also be found in moderate-sized and larger internetworks, but confederations generally are found only in the largest of BGP topologies, such as that of a large ISP. The following case studies discuss each of these tools.

Case Study: BGP Peer Groups

The preceding case study presented a BGP topology in Figure 3-24 in which an autonomous system is multihomed to several other autonomous systems. Suppose, however, that the router Colorado has 150 EBGP peers ...

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