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RFC 1654 http://tools.ietf.org/html/rfc1654
RFC 1771 http://tools.ietf.org/html/rfc1771

The Border Gateway Protocol (BGP) is an inter-Autonomous System routing protocol. The primary function of a BGP speaking system is to exchange network reachability information with other BGP systems. BGP-4 provides a new set of mechanisms for supporting classes interdomain routing.
(Compliant with IETF RFC1654.)

The format of the header is shown in the following illustration:

Marker

Length

Type

 

16

2

1

bytes
BGP-4 header structure
 

Marker
A 16-byte message containing a value predictable by the receiver of the message.

Length
The length of the message including the header.

Type
The message type. Possible messages are:
Open, Update, Notification, KeepAlive

Vulnerabilities for this protocol (from CVE)

CVE ID Protocol Source Port Targetport

TCP/IP Protocols:

AHARP/RARPATMPBGP-4COPSDCAPDHCPDNS
DVMRPEGPEIGRPESPFANPFingerFTPHSRP
HTTPICMPICMPv6IGMPIGRPIMAP4IPIPDC
IPv6ISAKMPL2FL2TPLDAPMARSMobile IPNARP
NetBIOS/IPNHRPNTPOSPFPIMPOP3PPTPRadius
RIP2RIPng for IPv6RLOGINRSVPRTSPRUDPS-HTTPSCTP
SLPSMTPSNMPSOCKS V5TACACSTALITCPTELNET
TFTPUDPVan JacobsonVRRPWCCPX-WindowXOT