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pakettypen [2009/09/13 14:37] (current)
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 +====== IS-IS packets  ======
 +Basically we can distinguish between three types of PDUs in IS-IS. 
 +
 +  * Hello packets
 +  * Link-state packets
 +  * Sequence number packets
 +
 +----
 +
 +These types of packets can further be divided into subcategories.
 +
 +==== Hello packets: ====
 +
 +  * IS-IS hello PDUs LAN Level 1
 +  * IS-IS hello PDUs LAN Level 2
 +  * IS-IS Point-to-Point hello PDUs
 +
 +==== Link-state packets: ====
 +
 +  * Level 1 Link-State PDUs
 +  * Level 2 Link-State PDUs
 +
 +==== Sequence number packets: ====
 +
 +  * Level 1 complete sequence number PDUs
 +  * Level 2 complete sequence number PDUs
 +  * Level 1 partial sequence number PDUs
 +  * Level 2 partial sequence number PDUs
 +
 +-----
 +
 +====== Structure of different IS-IS packets: ======
 +
 +In IS-IS every PDU consists of a header and a variable amount of dissimilar long fields. The first eight fields are always identical. All following fields have different characteristics due to of their different ranges of application.
 +
 +This chapter only treats the first eight identical fields. The other fields will be handled in the following chapters.
 +
 +{{PDU_Allgemein_eng.jpg}}
 +
 +Table 2: IS-IS PDUs   
 +----
 +__Meaning of the different PDU fields:__
 +
 +{{PDU_AllgemeinBeschreibung_eng.jpg}}
 +
 +Table 3: Description of the general PDU header fields
 +
 +
 +
 +
 +----
 +
 +__Sources:__
 +
 +
 +Abe Martey, IS-IS Network Design Solution, Kap. 3
 +
 +CCNP 1 Ver. 3.1 Kap.7
 
pakettypen.txt · Last modified: 2009/09/13 14:37 (external edit)
 
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