Introduction to the Border Gateway Protocol (BGP)
BGP
BGP version 4
Border Gateway Protocol (BGP)
Introduction
BGP Between AS’s
PPT Slide
When should I use BGP?
Multi-Homed AS
BGP is not needed...
BGP Attributes
What Is an Attribute?
BGP Attributes—AS Path
AS-Path
BGP Attributes—Next Hop
eBGP and Next Hop
BGP Attributes—Next Hop (Cont.)
iBGP and Next Hop
BGP Attributes—Local Preference
Local Preference
Multi-Exit Discriminator (MED)
Multi-Exit Discriminator
Applying Policy with BGP
Communities
Community Attribute
Community attribute (cont.)
BGP Communities
Load Balancing
BGP Load Balancing Problem
eBGP Multihop
BGP Multipath
Difficulties in Load Balancing
Internal BGP (iBGP)
iBGP
Scaling the iBGP mesh
BGP Confederations
BGP Confederation
BGP Route Reflectors (RR)
Route Reflectors
Asymmetric Routing Paradigm
Asymmetric Routing
Achieving stability
Stable iBGP Peering
Peering to Loop-Back Address
Relationship with IGP
Peer Groups
Route Flap Dampening
Route Flap Dampening (Cont.)
Flap Dampening: Terminology
Flap Dampening: Operation
Flap Dampening: Operation (Cont.)
BGP soft reconfig
Cisco IOS™ Version Information
Summary
Questions?
Email: pferguso@cisco.com
Return to: http://www.academ.com/nanog/feb1997