Back when I was studying routing algorithms, trying to understand
BGP meant wading through one of the longer RFCs. Stewart's BGP4
makes the protocol a lot more accessible. It begins with a thirty
page overview of Internet addressing and routing, covering such things
as CIDR, autonomous systems, and the difference between IGPs and EGPs.
A fairly dry explanation of the BGP protocol itself is followed by a look
at some typical BGP operations (IGP interaction and the various forms
of multi-homing) and common BGP extensions (Internal BGP scaling through
route reflection or AS confederations, flap dampening, BGP communities,
and capabilities negotiation).
BGP4 has broken the unwritten law that all computing books must be large
and expensive — it is a slim paperback with a reasonable price-tag.
I think it has to be a good investment for anyone running BGP, as well
appealing to the simply curious. (As the administrator of a small stub
network on the edge of the universe, without even a router under my
control, I'm mostly interested in BGP as an abstract protocol and as the
basis for Internet policy implementation.)
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- books about networking
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