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This document presents examples and inspiration for operator application of BGP Large Communities. Based on operational experience with BGP Communities, this document suggests logical categories of BGP Large Communities and demonstrates an orderly manner of organizing community values within them to achieve typical goals in routing policy. Any operator can consider using the concepts presented as the basis for their own BGP Large Communities repertoire.

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This document updates RFC 4271 by defining the default behavior of a BGP speaker when there is no Import or Export Policy associated with an External BGP session.

This document requests IANA to mark BGP path attribute values 30, 31, 129, 241, 242, and 243 as "Deprecated".