12th Lecture - Networking

[Jatka Bandi]

[quote name='k2s' timestamp='1318884413' post='3000703']

alagey producer garu...
[/quote]

nee mohaniki classu... adi fullu avvadam kuda....

[Idly Vishwanatham]

[quote name='k2s' timestamp='1318884722' post='3000737']





21 hours ago

[b]Idly Sir[/b][list]
[*]

No. I am the producer. Director vere unnaru.. inthaki meeru evaru? cinema lo chnace kavala??
[/list]
[/quote]


[img]https://lh4.googleusercontent.com/_8xtfDMugwRY/TbZV4k1XPaI/AAAAAAAABiM/50FVvj32cFQ/Auw.gif[/img] proof kuda techesava

[k2s]

[quote name='bantrothu bullabbai' timestamp='1318884761' post='3000739']

nee mohaniki classu... adi fullu avvadam kuda....
[/quote]

[k2s]

[quote name='Idly Vishwanatham' timestamp='1318884821' post='3000745']


[img]https://lh4.googleusercontent.com/_8xtfDMugwRY/TbZV4k1XPaI/AAAAAAAABiM/50FVvj32cFQ/Auw.gif[/img] proof kuda techesava
[/quote]

[Idly Vishwanatham]

[quote name='k2s' timestamp='1318885135' post='3000776']


[/quote]

Ante adi tamare na mastaru .. [img]http://lh4.ggpht.com/_KVkPY2XIbRQ/Taonj6mmKfI/AAAAAAAACH4/61xFRSoyUDs/SVelu.gif[/img] Aina msg pettina varu Add Req. kuda pettochu kada nenu evaro telisinappudu

[k2s]

Ok Guys I am starting the lecture......

Some general functions of router:


1. Learn routing information about IP subnets from other neighboring routers.
2. Advertise routing information about IP subnets to other neighboring routers.
3. If more than one possible route exists to reach one subnet, pick the best route based on
a metric.
4. If the network topology changes—for example, a link fails—react by advertising that
some routes have failed, and pick a new currently best route. (This process is called
convergence.)

[img]http://i56.tinypic.com/2rcpips.png[/img]

[Jatka Bandi]

vaddduuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

[k2s]

[quote name='Idly Vishwanatham' timestamp='1318885517' post='3000814']

Ante adi tamare na mastaru .. [img]http://lh4.ggpht.com/_KVkPY2XIbRQ/Taonj6mmKfI/AAAAAAAACH4/61xFRSoyUDs/SVelu.gif[/img] Aina msg pettina varu Add Req. kuda pettochu kada nenu evaro telisinappudu
[/quote]

kontha mandi ki..... they want to maintain 2 sep worlds ( DB & FB).....so andukey....... just hi ani palakarincha

[k2s]

[quote name='bantrothu bullabbai' timestamp='1318885614' post='3000824']
vaddduuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
[/quote]

[img]http://i55.tinypic.com/sevktc.gif[/img]

nenu class start sesina tarvata evaraina vaddu annadooo [img]http://s7.tinypic.com/bg2u74_th.jpg[/img]

[k2s]

[quote name='k2s' timestamp='1318885553' post='3000818']
Ok Guys I am starting the lecture......

Some general functions of router:


1. Learn routing information about IP subnets from other neighboring routers.
2. Advertise routing information about IP subnets to other neighboring routers.
3. If more than one possible route exists to reach one subnet, pick the best route based on
a metric.
4. If the network topology changes—for example, a link fails—react by advertising that
some routes have failed, and pick a new currently best route. (This process is called
convergence.)

[img]http://i56.tinypic.com/2rcpips.png[/img]
[/quote]

Both R1 and R3 learn
about a route to subnet 172.16.3.0/24 from R2 (function 1). After R3 learns about the route
to 172.16.3.0/24 from R2, R3 advertises that route to R1 (function 2). Then R1 must make
a decision about the two routes it learned about for reaching subnet 172.16.3.0/24: one with
metric 1 from R2, and one with metric 2 from R3. R1 chooses the lower metric route
through R2 (function 3)

[Jatka Bandi]

sare naak Networking emi telvad... manchiga pillonik cheppinatt istart chey malla...

[k2s]

Types of Routing Protocols:

Interior and Exterior Routing Protocols
IP routing protocols fall into one of two major categories: Interior Gateway Protocols
(IGP) or Exterior Gateway Protocols (EGP). The definitions of each are as follows:
■ IGP: A routing protocol that was designed and intended for use inside a single
autonomous system (AS)
■ EGP: A routing protocol that was designed and intended for use between different
autonomous systems

NOTE The terms IGP and EGP include the word gateway because routers used to be
called gateways.

[k2s]

Below figure clears shows....where we use IGP(EIGRP, OSPF, RIP, IS-IS) & where we use EGP(BGP)

[img]http://i54.tinypic.com/2it4u38.png[/img]

[k2s]

Three main
branches of routing protocol algorithms exist for IGP routing protocols:
■ Distance vector (sometimes called Bellman-Ford after its creators)
■ Link-state
■ Balanced hybrid (sometimes called enhanced distance vector)




IGP Metric Description

RIP-1, RIP-2 Hop count The number of routers (hops) between a router and the
destination subnet.

OSPF Cost The sum of all interface cost settings for all links in a route,
with the cost defaulting to be based on interface bandwidth.

EIGRP Composite of Calculated based on the route’s slowest link and the
bandwidth and delay cumulative delay associated with each interface in the
route.

[k2s]

[img]http://i55.tinypic.com/29o5xcl.png[/img]



Router B’s RIP route to 10.1.1.0 points through Router A
because that route has a lower hop count (1) than the route through Router C (2). However,
in the lower half of the figure, Router B chooses the two-hop route through Router C when
using EIGRP because the bandwidths of the two links in the route are much faster (better)
than that of the single-hop route. Note that so that EIGRP would make the right choice, the
engineer correctly configured the interface bandwidth to match the actual link speeds,
thereby allowing EIGRP to choose the faster route.