Network LAN Design

Network LAN Design

Network LAN Design with VoIP, and Wireless Services
This section will provide a detailed LAN-design of network with VoIP services, Wireless services, protocols, devices, and interconnectivity, with WAN.

This section include but not limited to

Equipment List

Hierarchical IP scheme and VLAN

Link IP addresses

High Level Diagram

Voice and Wireless Design

Equipment List:

Select all networking hardware

Suggested Template

 

Device
Cisco Model#
Quantity
Comments
Distribution Switches
Cat 3850 Series Swiches
2
48 port model, wireless capacity/PoE
Branch office router
RV220W Wireless
2
4 port switch, built in firewall
Access Switches
Cat 2600
10
48 ports
IDS
 
Network Monitoring System
Fire wall
 
 Cisco Unified Call Manger
 
2
Voice services
 
Step 8:

Now name each device as per naming convention (Since it is new company, make it for them)

Suggested template

Device
Device Configured Name
Placement
Connection
Comments
Cat 3850 Series switch
Data center Switch 1
Data center
Distribution Switch

VLAN1, 2, 8

 The switch has Inventory server, Payroll server, and VLAN 1, 2, 8
Core Switch 7600 Series
CoreRouter1
Room#1014
DSW1 and DSW2
ISP1
 How to determine quantity of equipment:

Always start with minimum number which can meet client requirements. For example, if client has 500 users, then select one switch. Now think other factors such as performance of network, redundancy.

Hierarchical IP scheme and VLAN 

Create an IP Scheme and VLANS.

I suggest use the table below to create your hierarchical IP addressing scheme.

Location
Number of

IP Addresses

Required
Future

Growth
Rounded

Power of 2
Number of

Host Bits
Subnet Address Assigned
Floor1
1500
200
2048
11
172.20.0.0-172.20.7.254/21
Floor2
200
100
500
9
172.20.8.0-172.20.9.254/23
Floor 3
45
20
128
7
172.20.16.0-172.20.16.122/25
Floor4
 
 
Create VLAN: In creating VLAN, I will suggest use organizational structure model for simplicity.

Examples: VPOPRVLAN1, VPOPRVLAN2

High Level Diagram:

Drawing a network topology diagram is the most challenging task. To overcome this challenge, we need to use Cisco modular technology in upgrading the network in other words top down design approach. The top design approach starts with Application, Devices and infrastructure. You will also use the same approach in designing WWTC network. Select all the applications for the network. Then select the devices needed to run these applications. Now you are ready creating network topology diagram. Since, in WWTC network we have one floor, so all of our devices, application and infrastructure will reside in one floor.

Create subnets. Generally subnet matches organizational structure. Also, in a large network to increase performance or for security reasons, subnets are created. Furthermore to accommodate the need of a department, the subnets can be subnetted further or VLANs are created or both. Every organization have subnets and VLANs. Let us say we need 20 VLANs, which will serve client’s requirements, performance and security of the network. Assign these VLANs to switches. For example; you need 3 switches to host 3 VLANs for VPOPR.
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