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BGP communities (RFC 1997) are used by service providers for many purposes, including tagging of customer, peer, and geographically originated routes. Such tagging is typically used to control the scope of redistribution of routes within a provider's network and to its peers and customers. With the advent of large-scale BGP data collection (and associated research), it has become clear that the information carried in such communities is essential for a deeper understanding of the global routing system. This memo defines standard (outbound) communities and their encodings for export to BGP route collectors. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 4844.