Thursday, 11th March 2010.

BGP State Machine, timers, and messages.

Posted on Tuesday, 31st May 2005 by sean

Before I can get to BGP Path Attributes, I realized I have to cover the mecanics of BGP. The BGP 4 RFC covers it in detail, Riverstone has good coverage, but I’ll summarize it below.
BGP State Machine
BGP goes through six states to establish an adjacency.
Idle – incoming connections are refused, and the system gets [...]

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BGP AS numbers

Posted on Monday, 30th May 2005 by sean

Every BGP autonomous system (AS) is identified by a 16 bit unsigned integer. An AS originates route advertisements consisting of a prefix and various attributes. This article will look at the AS numbers, which will then lead in to path attributes.
Like IP address space, the issuing of AS numbers is controlled by a [...]

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