 2.   TCP/IP____________________________111

EGP        -
 - .     -
    ,    
     AS.    EGP -
   ,   .

   (Error).     
  .      EGP
      (reason), 
      (message header).
    EGP   
 EGP (bad EGP header format),    -
 EGP (bad EGP data field format),   
(excessive polling rate)    
(unavailability of reachability information).

   EGP   . 2.33.

08                   16                 24            31

EGP Version	Type	Code	Status
Checksum	Autonomous System
Sequence	Data ...

. 2.33.   EGP-

EGP Version (8 ).      EGP  
  EGP.     EGP  
      
   .

Type (8 ).  .    . EGP  5
  .

Code (8 ).       .

Status (8 ).  .     ,
  .       
 (insufficient resources),   (parameter problem),
  (protocol violation)  .

Checksum (16 ).   .    
  ,       -
 .

Autonomous system number (16 ).    . 
 AS,    -.