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This chapter describes the IPriori commands to:
- Configure BGP on the local router
- Configure relationships with BGP neighbors including confederations and route reflectors
BGP Neighbors
Any two BGP routers that form a TCP connection to exchange routing in formation are called neighbors. A BGP peer group is a set of neighbors with the same update policies (as defined by route-maps, distribute-lists, and filter-lists).
BGP Confederations and Route Reflectors
BGP requires that all routers within an autonomous system (internal BGP, also known as IBGP) are fully meshed. As the number of routers in an autonomous system grows, the size of the internal mesh can become un-manageably large.
Confederations allow you to break your autonomous system into multiple sub-autonomous systems, and then to group them as a confederation. Each sub-autonomous system is fully meshed. Only one connection is required between sub-autonomous systems, thus reducing the number of peer connections required.
Another way to reduce the size of the mesh is to configure route reflectors. Route reflectors bend the BGP routing rules by passing internally learned routes to other IBGP speakers, thus reducing the number of peers connections within the autonomous system.
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Copyright © 2004
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
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Last Updated: 05/10/04 at 16:36:55