“A don’t want each department to access each

 

“A VLAN is
a group of devices on one or more LANs that are configured to communicate as if
they were attached to the same wire, when in fact they are located on a number
of different LAN segments. Because VLANs are based on logical instead of
physical connections, they are extremely flexible” (Cisco Systems, 1999-2004)

The benefits and network
flexibility are very important and can be very important to Iron Throne’s
network. VLANs can make a network 100% easier to manage and suit the goals of
the organisation. The benefits of using VLANs are shown below:

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Easier Administration

Implementing VLANs makes it easier
to manage the network because users with parallel network requirements will
share the same VLAN. For example, if a new switch is implemented into the network,
all of the configuration for the VLAN that has already been configured will
then be implemented as soon as ports are assigned.  (Academy, 2014)

This could
be a benefit to Iron Throne as they may want to add

Performance

Separating Layer 2 Networks into multiple
workgroups will provide better performance and also reduce sending traffic to
unnecessary destinations. For example, if a workgroup consists of 20 users and
the traffic is only intended for 10. You can place those other 10 users on a
separate VLAN and this will reduce the traffic by a half. (Academy, 2014)

Security

In a VLAN environment, sensitive
data may be broadcast over a network. You can place only those who can have
access to that data on a VLAN and this will reduce any risk of someone who
isn’t allowed access, gaining access to the data. (VLAN
Benefits, n.d.)

This would benefit Iron Throne as
they want three different departments but they don’t want each department to
access each other’s resources/data. They can do this by putting each different
department on different VLANs and adding access control lists to prevent them
from being able to see each other.

Access Control Lists (ACL) are a
set of rules that are created on a router to control network traffic. There are
two types of ACL’s: Standard and Extended. Standard ACLs allow filtering
criteria at Layer 3. Extended ACLs allow filtering criteria on Layer 3 and 4.
Extended ACLs have bigger control over network access and also provide bigger
flexibility. Iron Throne can create ACL’s so that traffic from the Sales
department will not reach or see the Administration department.  (Popeskic, 2017)

Task 2 – Uses of VLAN Trunk Protocol (VTP)

“VLAN Trunk
Protocol (VTP) reduces administration in a switched network. When you configure
a new VLAN on one VTP server, the VLAN is distributed through all switches in
the domain. This reduces the need to configure the same VLAN everywhere. VTP is
a Cisco-proprietary protocol that is available on most of the Cisco Catalyst
series products.” (Cisco, Understanding VLAN Trunk Protocol (VTP),
2014)

The VTP Trunking Protocol is used
to control and separate network broadcasts with VLANs. The Trunking Protocol will
enable the movement of the traffic to the separated parts of the network which
if configured as a VLAN. To enable VTP to work you will need to setup a VTP domain
name – this can be made up but you will need to make sure that the domain name
is exactly the same on all other switches. (Bipin, 2015)

A switch will need to be configured
as a VTP Server and this will be used to manage the VLAN configurations on network
allowing you to create, modify and delete VLANs through the VTP server. However,
the VTP configuration has a revision number which does increase each time you
make a change on the VTP Server. The revision number helps the receiving
switches determine if the information contain a change or if it has the same
information as the switch already has. Every time you do make a change on the
VTP server, this is then synchronised to all the other switches which will be
VTP Clients. (Bipin, 2015)

 

 

 

 

 

(Introduction to VTP (VLAN Trunking Protocol))

To enable VTP to work you will need
to setup a VTP Domain Name – This you can make up but you need to place the same
domain name on all other switches.

One use of VTP is that it does not
require a new VLAN to be manually created to each and every switch in the network.
If you add a VLAN to one switch, VTP will then replicate this information to
each other switch that is placed on the network, therefore creating a
consistent VLAN configuration to all switches. (Cisco, Understanding VLAN Trunk Protocol (VTP), 2014)

Another major use of VTP would be
in large network environments, it allows creating and deleting VLANs, and
making changes to the configurations of VLANs. If VTP wasn’t implemented, you
would have to manually add VLANs to each switch.

Another use of VLAN Trunking
Protocol would be in very large networked environments. VTP allows you to create,
modify and delete VLANs. If VTP wasn’t in use then you would have to add a VLAN
to every switch in the network manually. If VTP is implemented, you will be
able to add a VLAN to one switch and then the switch will replicate the changes
to the other switches over the network. If you have configured a VTP management
domain name one each switch, the switch will then exchange VTP information routinely.
This means that they require no more configuration or management throughout the
days.

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