Introduction To ROUTING PROTOCOLS

gascitytankNetworking and Communications

Oct 28, 2013 (3 years and 11 months ago)

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Introduction To

ROUTING PROTOCOLS


BY:


ADUAIT POKHRIYAL

ID. No 34915

3
rd

Year

COMPUTER ENGINEERING

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
.


Types of Routers


Core Layer


Distribution Layer


Access Layer



Fixed : 2500
Series(2503,2509)


Modular : 2600
Series(2620)

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.

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

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.

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.




Dynamic Routing


Find Network and Update.


Cost CPU processes.


Types: Distance Vector


Link State


Hybrid





Distance Vector


Best Path by judging Distance.


Example : RIP,IGRP


Send entire Routing table to directly
connected neighbours.





Link State


Shortest Path first


3 seperate tables.

(1) Track of directly attached neighbors

(2) Topology of entire network

(3) Routing Table


Example : OSPF



Hybrid


Use aspects of both distance vector and
link state.


Example : EIGRP




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:


Cisco



Simulations