1. Overview
(short description of BGP and when it is used)
2. Discussions
- The Finite State Machine:
Looks at how the BGP router system communicates between itself and
other BGP peers. We start by looking specifically at it's state
machine, and the different things it does at each state. Then we look
at how it sends messages between peers (types of packets) at the
different states. Then finally, we look at the basic BGP timers and how
they relate to the different states.
- Basics Of BGP:
In this doc we will look at the basic steps in getting BGP up and
running. This doc is slanted on working with BGP on cisco routers, so
it discusses more what to do, and less on the theory. See the Appendix
at the end of the doc for further reading on BGP.
- IP and Metrics:
Here, we will look at how we can, or prevent, summarization of groups
of IPs within BGP. We will also look at how BGP uses metrics to
manipulate pathways from the end customer to te internet; with local
preferences and weights (bigger is better), and from the internet (same
AS#) to the end customer; with MED's and paths (smaller is better).
- Filters and Route Maps:
Finally, we will first discuss some of BGPs special filtering
abilities; globally filtering AS path info with regular expressions,
filtering via routes from specific neighbors with neighbor distribution
lists, and filtering routes biased on IP's with special extended access
lists. Then we will look at look at how BGP distributes routes from or
to BGP to other route engines with route redistributions, and then look
at how bgp can group routes with very advanced search methods and even
modify routes with route maps.
3. Labs and Examples
- Basic BGP Routing:
This lab works with the most basic BGP setup, and showing how BGP
sending routing information between routers. Note that this lab does
not deal with IGP routing.
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A.1 Appendix 1. References
A.1.1 Books:
A.1.2 RFCs:
A.1.3 PDFs:
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