From Mycomputer Notes
Link State and Distance Vector Routing Protocols
| Protocol | Examples | Characteristics |
| Distance Vector | RIP v1 & Rip V2
|
- Copies Routing table to neightbors
- Updates frequentlu
- RIP v1 & v2 use hop count as metric
- View the network from the perspective of the neighbors
- Slow to converge
- Susceptible to routing loops
- Easy to configure and administer
- Consumes a lot of bandwith
|
| Link-State | OSPF IS-IS |
- Uses shortest path
- Updates are event triggered
- Sends Link-state packets to all network routers
- Has common view of network
- Fast to converge
- Not as susceptible to routing loops
- Harder to configure
- Requires more memory and processing power than distance vector.
- Consummes less bandwith than distance vector.
|
Link State Routing Protocols Features
How routing information is maintained
- LSAs
- Topological Database
- SFP Alogarithm
- SPF Tree
- Routing table of paths and ports to determine the best path for packets.
===Link states routing alogarithms
Advantages & Disadvatages of Link State routing
| Advantages | Disadvantages |
- Fast Convergence times, as changes are reported immediatelly by the source affected
- It provides robustness againts routing loops
- Routers known the topology
- Link-state packets are sequenced and aged
- The link-state database sizes can be minimized with carefull network design.
|
- Significant demands on memory and processing resources
- Requires very strict network design
- Requires a knowledgeable network administrator
- Initial flooding can impede network performance.
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