Border Gateway Protocol Concepts - NETGEAR ProSAFE M5300 Series Software Administration Manual

Border Gateway Protocol Concepts

Border Gateway Protocol (BGP) is an exterior routing protocol that was developed for use in
TCP/IP networks. The primary function of BGP is to allow different autonomous systems
(ASs) to exchange network reachability information.
An AS is a set of routers that are under a single technical administration. This set of routers
uses a different routing protocol, for example, Open Shortest Path First (OSPF), for intra-AS
routing. One or more routers in the AS are configured to be border routers, exchanging
information with other border routers (in different ASs) on behalf of all of the intrarouters.
Although the primary function of BGP is to exchange routing information between ASs, it can
be used with an AS. Once it is used in an AS, it is called internal BGP or iBGP. In contrast,
the BGP used between ASs is called external BGP or eBGP.
Note: The NETGEAR ProSafe Managed Switch does not support any
version of BGP other than version 4.
Note: BGP can be configured through the CLI only.
Note: SNMP support is limited to the standard MIB, which provides primarily
status reporting.
Note: The only optional parameter recognized in an Open message is the
Capabilities option (RFC 5492). RFC 4271 deprecates the
Authentication option. If a neighbor includes the deprecated
authentication parameter in its Open message, NETGEAR BGP
rejects the Open message and does not form an adjacency.
Note: NETGEAR eBGP doesn't support multihop (RFC 4271 section 5.1.3).
Managed Switches
BGP
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