1. Introduction To ROUTING PROTOCOLS
BY:
ADUAIT POKHRIYAL
ID. No 34915
3rd Year
COMPUTER ENGINEERING

2. Routers : Routers are used to connect networks together and route packets of data from one network to another providing best available path for transmission.
Protocols : Protocols are set of rules that govern data communications. It represents an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating.

3. Types of Routers Core Layer Distribution Layer Access Layer
Fixed : Series(2503,2509)
Modular : Series(2620)

4. Study of Router
Routing Protocols : Protocols that defines algorithms to be used for updating routing tables between routers.
Examples : IGRP, RIP, OSPF
Routed Protocols : Routed protocols are used to transmit user data through an internetwork.
Examples : SPX(Sequecne packet exchange), IPX(Internet packet exchange)
Routed protocols travels with the data.

6. A routing protocol defines the set of rules used by a router when it communicates routing information between neighbour routers.

7. Default Routing
Use for only stub networks. (i.e., with only one exit path.)
It is easy to impliment.
Can be implimented on cheap router.
Not much changes in configuration for small change in network.

8. Static Routing Manually add routes in router's routing table. Secure
Administrator should have knowledge how router is connected in order to configure routes correctly.
Can be applied to cheap routers.

9. Dynamic Routing Find Network and Update. Cost CPU processes.
Types: Distance Vector
Link State
Hybrid

10. Distance Vector Best Path by judging Distance. Example : RIP,IGRP
Send entire Routing table to directly connected neighbours.

11. Link State Shortest Path first 3 seperate tables.
(1) Track of directly attached neighbors
(2) Topology of entire network
(3) Routing Table
Example : OSPF

12. Use aspects of both distance vector and link state. Example : EIGRP
Hybrid
Use aspects of both distance vector and link state.
Example : EIGRP

13. RIP V1:(Routing Information Protocol)
Public Protocol
Classfull i.e.,No Subnetting/VLSM/IPv6
Max Hop Count 15
Update Time 30 sec
Administrative Distance 120
RIP V2:
Classless
public
IGRP:(Interior Gateway Routing Protocol)
Autonomous Number
Update Time 90 sec
Administrative Distance 100
Max Hop Count 255
Cisco
OSPF:(Open Shortest path First)
Hop count limit : None
Public
EIGRP:

14. Simulations