Chapter 16: Dynamic Routing Protocols
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 461
AS confederations break the AS down into smaller entities. The figure below depicts a BGP autonomous system that is
broken down into sub-ASs.
Figure 80: iBGP with Confederations to Reduce Full Mesh Peering
Within each sub-AS, a full mesh exists between all peers; however, a single eBGP peering session is sufficient for
interconnection between sub-ASs.
Note: From the perspective of ASs outside of the confederation, the original AS does not appear any different. That is, the
sub-AS configuration is contained within the original AS.
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