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Large-Scale IP Network Solutions (CCIE Professional Development)
book

Large-Scale IP Network Solutions (CCIE Professional Development)

by Khalid Raza - CCIE, Mark Turner
November 1999
Intermediate to advanced
576 pages
15h 3m
English
Cisco Press
Content preview from Large-Scale IP Network Solutions (CCIE Professional Development)

BGP Scalability Features

At the beginning of this chapter, the text noted that a BGP router never advertises IBGP-learned routes to another IBGP neighbor. This implies that all IBGP neighbors must be connected via a full mesh of IBGP peering sessions.

Even in medium-size networks, this full-mesh requirement can lead to serious scaling difficulties. Route reflectors and confederations are two ways of solving the full-mesh problem.

Route Reflectors

Route reflection (RFC 1966) was designed with three goals in mind:

  • To be simple to understand and configure

  • To enable easy migration from full-mesh to reflected environments

  • To be compatible with IBGP routers that do not understand route reflection

Route reflection achieves these goals very well. ...

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Publisher Resources

ISBN: 1578700841Purchase book