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BGP confederations: help with the number of peering session capability
- RFC 5065
- The basic idea with confederations is to divide a normal BGP autonomous system into multiple sub-autonomous systems
- 1 big iBGP domain >>> SUM ( many smaller #eBGP domain )
- The outer or containing autonomous system is called the confederation autonomous system.
- Reduce iBGP fully mesh network >>>> "eBGP" meshing
- But still require full mesh withing the sub-AS (#eBGP domain)
Route Reflector: Greatly improve with the number of peering session capability