5.4.    IP-      427

,       -4-2   -
    1 (     3  180 ).

        
    ,   
(triggered updates)    (hold down).

     ,  , 
     - ,    
  ,      
.         -
    ,      -
,        .
  ,     - -
         -
          
    .

     .    
-      ,     -
.  -      
   ,     
         .
,    -    -
      ,      
         .

5.4.3.    OSPF

 OSPF (Open Shortest Path First,    
)       -
 (   1991 )    , -
      .

 OSPF        -
 .         , 
      IP-,    -
 .       -
      ,     
 .        -
     RIP,      
    .    router links
advertisement     .  ,  
     ,   
RIP-,     .   -
       -
    ,      
.

         -
 .         -
      .    