BGP confederation

In network routing, BGP confederation is a method to use Border Gateway Protocol (BGP) to subdivide a single autonomous system (AS) into multiple internal sub-AS`s, yet still advertise as a single AS to external peers. The intent is to reduce IBGP mesh size. The confederated AS is composed of multiple ASs. Each confederated AS alone has iBGP full....
Found on http://en.wikipedia.org/wiki/BGP_confederation
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