In the section we're going to talk about scaling them that works.
Let's go ahead with the network design implementation first.
And the question is why we need scaling networks.
Guys we need to scale our networks because enterprise networks grow and expand.
Today we have almost zero tolerance for interruptions.
We need more bandwidth.
Day by day and we need an effective administration approach for our network.
So one of the scaling options is the hierarchical design hierarchical this term provides us is a management
and troubleshooting and also if the usage of the resources.
We have three layers in hierarchical this time and they are accessed this through mission and core access
layer is the end the wireless networks which are the PCs IP phones printers and etc..
This Obaid-Chinoy or manage the individual branch office one connections and the colyer provides the
high speed for services for moving packets between distribution layer Dubois's in different regions
of the network.
And we should also use the redundant devices and pads which provide highway lability and DeWyze and
pet redundancy as you know this is an expensive solution.
But this is necessary for large enterprise networks as you know Alice go ahead with the air to channel
8 or channel is a poor playing aggregation technology or Porcello architecture used primarily on Cisco's
sweats.
It allows grouping of several physical internet links to create one logical internet link for the purpose
of providing fault tolerance and high speed links.
But when surveyed Shradha ran the service as you can see in our figure we have to assume it some day
or so which once we do in the first full year they are connected to each other by using four separate
one gigabit per second Blancs but were millions and entered Chernow the ether combines them together
and creates the air wall for gigabit per second.
Channel link for us.
Let's go how we can expand our Locklear in that connection.
Sometimes guys we may need to expand to our local area network connections locally in a connection can
be expanded with using wireless access point devices for example as you can see in the figure laptops
these guys use the Lokeren orc's sources remotely by the help of the access point.
And let's go ahead with choosing the right switch.
Why we are choosing the right switch that fits our needs.
We have three things to take care about.
Guys For example if we need more bandwidth we may need to use a modular switch or if we don't have enough
space in our cabinet we may need to use fixed to its and other things that we would need to care about
while we are choosing as to which is if we are going to use P.O.D. or not.
For example if our end devices also support P.O.D. And if we dont want to use an extra power cable we
should choose a payware power or internet switch.
If it plucked two or more switch to each other using takeable switch would be a great choice and which
act as a single switch and pro-white is a management for us.
It is also important to make a choice between L.A. 2 and layer three sweats if we're going to use our
switch for running purposes.
So we need to use multi-layers suites which can make both players to switching and layer 3 rodding the
last thing we need to care about while we are choosing so rich is at the port number if we have lots
of endwise is connected to our switch we need to choose as to which which has higher part numbers.
So let's go ahead with choosing the right rather.
There are various types of rodders also and we have a few things to care again while choosing rather.
For example if you are choosing a router for branch offices or small medium sized business you need
to choose a branch rather like Cisco twenty eight 11 or Cisco thirty eight forty five.
For example if you're choosing a router for a bigger office or for example if you're choosing your rather
for your datacenter which will be a collection point for other locations you need to choose an edge
router this time.
Like Cisco 2 0 0
and let's go ahead with the ISB Carruthers For example let's said if you're working in an ISP and if
you need to rather rich poor it's excellent writing skills and great bandwidth.
Up to nine hundred and twenty two terabit per second you need to choose a core larger corridor like
Cisco C-rist X series and let's go ahead with the Vitti P Richy P We'll run through ranking Pulo code
is a Cisco proprietary protocol that propagates the definition of violence on the local or in at work
in the same way.
Tippett domain and provides is a management because you do not manually add or delay the release in
VTB portico we have a VTB server switch this terabits and synchronize the relay information.
You can propagate the normal range Rylance with which to pay.
But if you want to propagate the center branch will as usual use VTB version 3.
These external tranch should be distributed by using the ETP.
Werman three guys let's go ahead with TV Tippee mode.
We have three months.
They are server client and transparent so in the server modes create modify and delayed Whelan's and
specify other configuration parameters such as were to be version and we T-P pruning Srishti in the
transparent mode just forwards VDB advertisements and does not participate in BGP Whelan's that are
created renamed or delays on transparence which are local to that switch on they search in the client's
mode can not create modify or dilates will last because we're going to make an excellent packet Raceland.
But the way the modes and you'll see the difference between server client and the transparent arm our
lab exercise and you will understand what is going on between these guys better square with the with
the perversions.
We have three versions of the VTB and they are we to be version one where the reversion to and the meta
perversion three with a perversion.
One is the default GTP mode with the P version 2 is similar to it to be version 1.
Additionally supports the talking shrink and VTB version 3 is the version that provides more security
enhancements with the capability of supporting extended we land Rantz and let's growth that the configuration
region number term configuration revision number is a 32 bit number that indicates the level of revision
for having to pay packet that used in order to determine whether the received information is more recent
than the current version.
This number is incremented by one for each reland change and it's to each just use an update with a
higher revision number.
This update is always used.
For example let's say that we have a reason.
So in here let's say that we just switch one and let's say that this is switched to this case switch
three and let's say that when we quit everyone in here for example that's great we run 20 in here because
of this is a very deep answer.
We come to any real merit will be created on this which And on this which three as well as you can see
here.
And as soon as I add the name we learned to this guy.
The revision number will change from 6 to 7 and then on everywhere as you can see let's go ahead with
the message types.
We are three maybe DP message types summary advertisement advertisement request and the subs that subs
an advertisement some advertisement is sent by VTB So we're in five minute intervals to its edges and
suites and includes the VTB domain name and the configuration no region number advertizement request
is send.
If some area advertisement includes a higher configuration number than the current value and subsidy
advertisement holds the we learn information.
Let's go ahead with how we can configure the BTP to configure the ability to be vigilant Reinking poor
or call or switch.
First we need to choose the related Motz we did mod's Cambiasso were or Collines or transparent as you
know and everything Serwer is the default month R.K. to convey your the Tippit murder and server we
are typing with Topy mode and ETP much server client or the transparent then we are defining the wind
speeds made by tapping with repeat domain and the VTB domain name because all this with Schuth have
the same domain name to share in the VTB.
Then we can also define a password which should match on the Swades to share with we pay advertisements
again.
And two were fired the way the configuration we are using the show ATP's that is command and we can
check the ETP version configuration revision number and number of existing Willam maximum will and support
that locally BTP operating more domain name pre-warning mode and something like that.