The animated TECHTip Tutorial is available here.

In some cases, distant-vector and link-state protocol can coexist in the same router, each with its own methods and procedures for handling route lists or tables as well as packet (data) processing. Since this is a dynamically changing issue, check with the router manufacturer for specific details.

Note: Each of OSPF [Open Shortest Path First] message is a different message length-format-function:

1. Hello - time synchronization and routing information - This measures the time (round trip ping time) to each router to compute shortest route based on delay and topology information

2. Database description - network map topology (description)
3. Link status request - “What is your topology?”
4. Link status update - “Here’s my topology.”
5. Link status acknowledgement - “Got your topology.”

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[tags]database,ospf,open shortest path first,link status,format-function,distant-vector,link-state protocol[/tags]