Date of Issue: 09-01-2023

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I. Foreword
II. What problem are you trying to solve?

A. Scaling Potatoes

1. OSPF Scaling

B. BGP Potatoes

III. More Tools in the Toolbox

A. AS Path Expressions

1. Exact Matches
2. Special Matching Characters

B. Prefix Lists
C. Actions in Neighbor Statements
D. Originating BGP Default
E. Actions in Route Maps

IV. iBGP Scalability

A. Synchronization
B. Route Reflectors (RFC2796)

1. Implementing Basic Route Reflectors
2. Multiple Reflectors and Cluster IDs
3. Scaling and Using Route Reflectors

C. Confederations

1. Confederation Configuration
2. Implementing Confederations in an ISP
3. Implementing and not Implementing Confederations in a Large Enterprise

V. eBGP Scalability

A. Route Flap Dampening
B. Route Refresh
C. Peer Groups
D. Interface Prefix Restrictions
E. Route Servers
F. Martian Filters

VI. AS Manipulation for Scalable Multihoming

A. RFC 1998
B. Private AS Path Manipulation
C. RFC 2270

VII. Conclusion
VIII. References

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