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Vigor3910 Series User’s Guide
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BGP means Border Gateway Protocol. It is a standardized exterior gateway protocol which can
exchange routing and reachability information between autonomous systems (AS) on Internet.
The protocol TCP is used by two routers supporting BGP for data transmission. They can
exchange the BGP routing information for each other. A BGP router is the “neighbor” of other
BGP routers. Define the IP address, AS number for the router is essential for TCP connection
of BGP routing information exchange.
AS, the abbreviation of Autonomous System, is a group interconnected with multiple IP
addresses. Each AS shall be assigned with one AS number (ASN). The ASN is is a unique
identifier for AS to distinguish each network group in the whole interconnected network. It
can be operated by one or several ISPs and follows the routing policies made by ISP.
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