Routing Basics

Routing:

The procedure of connecting two or more different networks

(Or)

The procedure of define routes, protocols and to find best path in them by using algorithms and provide security.

Routing protocol:

It is used to determine the best path for the packets are data to travel from source to destination

Routed protocol:

Which carries the data in the established path is called Routed Protocol. Routed protocols are always assigned to an interface and determine the method of packet delivery.

Ex of routed protocols is TCP, UDP, IP, IPX, SPX, Apple talk.

IP routing:

It is the procedure of moving packets from one network to another between router Is called IP routing.

They are three types of routing

1. Static routing   

2. Default routing   

3. Dynamic routing

Static routing	Dynamic routing
Adv: ·         No over load on the router	Adv: ·         Automatically it will updates all the routes
Disadv: ·         Over burden on the administrator ·         Manually assign all the routes ·         If there any down in interface it will not update automatically.	Disadv: ·         Over load on the router ·         High cpu usage ·         High end routers has to be used

Dynamic routing types:

• Distance vector                                          -  RIP, IGRP
• Link state                                                   -  OSPF, IS-IS (intermediate system)
• Hybrid (or) Advance distance vector        -  EIGRP
• Path vector                                                 -  EGP, BGP

1. Static Routing – We have to manually configuring the routes

Ex: iproute 10.0.0.0 255.255.255.0 serial 0/0

2. Dynamic Routing – Automatically router will learn the routes based on the Routing Protocols

Load Balancing Using Static Route:

Static route can be configure to load balancing and redundancy traffic across parallel links. This method usually used by enterprise network to connect to their Providers. Let’s take a look at sample network topology where R1 connected to R2 using 2 serial interface.