Tell everybody we are starting our CCN of course with dynamic routing protocols
if you want to make running in our network we have two options and they are tatic routing and dynamic
routing static running running tables in specific rather to be set up by the network administrator dynamic
Radi use running Perl of course that dynamically discone or destinations and how to get them dynamic
routing Al's rodding tables rather to change if a rather under rug goes down or if a new work is added
in dynamic routing writing protocols running in ralliers continuously exchange network status updates
between each other as broadcast or multicast with the help of routing update message sent by the routing
protocols rather it can continue to update the writing table when our end or topology change happens.
And let's take a look to the enterprise network infrastructure in an enterprise infrastructure.
We have four main parts the first part is HQ.
The second one is branch offices.
The third one is data centers and the last one is the internet edge.
Normally place that would collect traffic there which are coming from the branch offices and in data
centers we have servers Lord balancers and some corner or key words such as Carruthers and corsets and
something like that.
An Internet edge is the place that we are using when were going to the Internet site where we try to
use protocols in enterprise network infrastructure.
We need to take care of something.
Its recommended to use a single Roding protocol within the company work.
And if there is a geographical or dispersed structure is recommend that they use BGP with ISP and OSPF
or IA GAAP for the internal network.
So how do we choose which who are the protocol we are going to use.
The first thing we need to ask then is what is the size of our network if thats a real small app.
For example we can use rep but if its a huge network and its our internal size or its path would be
better for example.
The second thing we need to ask is do I just use Cisco for example some protocols or some technologies
are just used with Cisco devices.
GAAP was Cisco propria the before but that's an industrial standard right now.
But before we could we could just use edgier with the Cisco Two-Eyes.
The third thing we need to take care is what is the porticoes convergence time Corrigan's time is a
really really important point we need to focus on and we are going to take a look to this one.
And the last thing we need to ask is What is the scale ability of the protocol as well.
We are at Chegg all of these steps and we are going to take a deeper look in our next sleights Lets
take a look to the IGMP and Egypt right now.
I PS support small medium and large scale organizations but they are scalable it is limited.
They can quickly coerce work.
The most commonly used is are yeah GAAP and OSPF e.g. people are used to exchange routes between different
autonomic systems and BGP is the only AJP use today.
The main function of the BJP is to exchange a large number of froths But when different other systems
are running are the code pipes we have three types of routing protocols and are distance Whitter links
they and their pet vector.
This doesn't work the protocols runs according to hop count every browser knows as much as the neighbor
tells him there's no network map on Rather's and we became you an example rip and edge or pay for the
distance vector protocols and links.
They rather is running with these protocols can extract board member off the entire network.
That is they have the knowledge of the always between two points.
Thus they collect all the subnets in a tree and make the best decision about which way to go with the
shortest path.
First algorithm they decide according to Ben read play an asshole or an impersonator.
Rather information is used to determine the best drugs similar to this inspector.
Rather just do not have or met.
Let's take a look to the importance of the Colmer just now right now Corden's is the time it takes for
the others to notice the change in the work to share information about the change with each other and
to make the necessary calculations to find the best route.
Again today Komori Jones is a really really really big and important point.
For example if there's a problem on your network your network needs to work in one or two seconds in
some protocols.
It takes really a long time to converge and they are not preferred in today's networks.
And the left think we're going to talk about is the route summarization summarization reduces throttling
load and improves the stable D and scalability of shared driving information between routers and the
figure as you can see we have four brothers and we have some routes in here 22 in year two and three
in here 20 and 21 in here we have four separate routes as you can see but rather a carrier present this
fall works using a single network these four networks four separate Oist can be summarized as to where
it is 0 0 and Fleisch 14 and you can see that the summer Mascaret is used here is Fleisch 610.