Creation of Link State Packet (LSP)

Creation of Link State Packet  (LSP)

•       LSP needs to carry a lot of information such as node identity, the list of links, a sequence number, and the age.

•        Node identity and  list of links are needed to make the topology.

•       Sequence number facilitates flooding and distinguishes new LSP from  old one.

•       Age prevents old LSP’s from remaining in the domain for a long time.

•       LSP’s are generated on two occasions:-

ü  When there is a change in the topology of the domain: Triggering of  LSP scattering is the main way of quickly informing any node in the domain to update its topology.

On a periodic basis: Period is much longer than Distance Vector   Routing  protocol. It is done to remove old information from the table