ISIS packet type and its code

johnny_jiang

Valid Code Values for Nine Types of IS-IS PDUs
      
Level 1 LAN IS-to-IS Hello PDU
Type 15
   
Code 1 = Area addresses
Code 6 = IS neighbors (hellos)
Code 8 = Padding
Code 10 = Authentication information
Code 129 = Protocols supported
Code 132 = IP interface address
      
Level 2 LAN IS-to-IS Hello PDU
Type 16
   
        Code 1 = Area addresses
Code 6 = IS neighbors (hellos)
Code 8 = Padding
Code 10 = Authentication information
Code 129 = Protocols supported
Code 132 = IP interface address
      
Point-to-point IS-IS Hello PDU
Type 17
   
        Code 1 = Area addresses
Code 8 = Padding
Code 10 = Authentication information
Code 129 = Protocols supported
Code 132 = IP interface address
      
Level 1 Link-State PDU
Type 18
   
Code 1 = Area addresses
Code 2 = IS neighbors (LSPs)
Code 3 = ES neighbors
Code 6 = IS neighbors
Code 10 = Authentication information
Code 128 = IP internal reachability information
Code 129 = Protocols supported
Code 132 = IP interface address
      
Level 2 Link-State PDU
Type 20
   
        Code 1 = Area addresses
Code 2 = IS neighbors (LSPs)
Code 2 = IS neighbors
Code 4 = Partition designated Level 2 IS
Code 5 = Prefix neighbors
Code 10 = Authentication information
Code 128 = IP internal reachability information
Code 129 = Protocols supported
Code 130 = IP external reachability information
Code 131 = IDRP information
Code 132 = IP interface address
      
Level 1 Complete Sequence Number PDU
Type 24
   
Code 9 = LSP entries
Code 10 = Authentication information
      
Level 2 Complete Sequence Number PDU
Type 25
   
        Code 9 = LSP entries
Code 10 = Authentication information
      
Level 1 Partial Sequence Number PDU
Type 26
   
Code 9 = LSP entries
Code 10 = Authentication information
      
Level 2 Partial Sequence Number PDU
Type 27
   
Code 9 = LSP entries
Code 10 = Authentication information
               
               
               

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