NOTIFICATION Message

NOTIFICATION Message
Whenever an error occurs during a BGP session, the BGP speaker generates a NOTIFICATION
message. As soon as the BGP speaker generates the NOTIFICATION message, the session is terminated.
The NOTIFICATION message contains error codes and error sub-codes that allow
network administrators to more efficiently troubleshoot the problem. Figure 8.7 lays out the
format of the NOTIFICATION message.
The Error Codes field is 1 byte in length and has six possible error codes. The Error Subcodes
field is 1 byte in length and contains the error sub-code. Only the first three error codes
have error sub-codes. Table 8.3 lists the possible error codes and their related error sub-codes.