Thursday, November 21, 2013

Link State Routing Protocol (LSRP)

In previous section, we already learn about DVRP.
Today we will learn about LSRP.
What is LSRP?
LSRP is a routing protocol that contain a full topology of network.
LSRP is using Djikstra algorithm or commonly called by SPF (Shortest Path First) Algorithm.
Now we will learn how the process of Link State:
1. Every router will learn about it’s directly connected network
2. Every router will send “hello packet” to neighbor / directly connected network.
3. Every router make LSP (Link State Packet) that contain information (cost) every directly connected network.
4. Every roter send LSP to all neighbor/flooding , after that being saved in a database.
5. Every router use it’s database to create topology and count the best path to every destination network.
The advantages using LSRP is:
- Know all topology
- Fast Convergence
- LSP send if there are any changes in topology
- Hierarchial Design (multi area).
the example of LSRP is OSPF.
here is the example for OSPF


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