OSPF(Open Shortest Path First)

Annotations:

• The Open Shortest Path First (OSPF) protocol is an intra - domain routing protocol based on link state routing .

Attachments:

• OSPF common header

1. Type of links
   1. Point-to-point
   2. Transient
   3. Virtual
   4. Stub
2. GRaphical representation in ospf
3. Types of Packets
   1. Hello

      Attachments:

      • hello
   2. Database Desciption

      Attachments:

      • Database Description Packet
   3. Link State Request
   4. Link State UPdate

      Attachments:

      • Link state update packet
      1. Network Link
      2. Summary Link to network
      3. Summary link to AS boundary router
      4. External link
      5. Router Link
   5. Link state acknowledgement

      Attachments:

      • Link state acknowledgement packet