This low level design document covers the physical and logical connectivity of the <NAME OF COMPANY/SCHOOL> network. It includes details of the network hardware components, physical layout, IP addressing scheme, VLAN configuration, routing protocols, and security features to be implemented. The network architecture uses a Cisco 6509 aggregation/core router with line cards distributed across modules for redundancy. Figures and tables provide the network topology diagram, equipment specifications, and VLAN allocation.

1. <NAME OF COMPANY/SCHOOL>
Low Level Design
Version 1.1

2. 1 Contents
1 Contents..........................................................2
2 Figures...........................................................6
3 Tables ..........................................................7
4 Document Information.............. ................... ...........9
4.1 Review and Distribution.................................. 9
4.2 Modification History............................. ........9
5 Document Acceptance Certificate...................
6 About This Design Document .............
6.1 Document Purpose.........................
6.2 Intended Audience..........................
6.3 Scope ...............................................
6.4 Document Usage Guidelines...................
6.5 Assumptions and Caveats....................
6.6 Related Documents........................
6.7 References .....................................
7 Network Overview........................................
7.1 Network Layout:..........................................
7.2 Design Considerations................................
8 Physical Network Design..................................
8.1 Network Hardware Components...........................
8.1.1 Business Network BoQ..................
8.2 LAN Wiring Diagram and Physical Lay-out
8.2.1 First Floor Wiring Lay-out
8.3 Cut Sheets
8.3.1 MDF to Room #
9 Network Architecture
9.1.1 Network Connectivity
9.1.1.1 Line Card Placement in Core 6509 of Business
Network
9.1.1.2 Core Switch to WLC
9.1.1.3 Core Switch to IPS Connections
9.2 Labelling Convention
9.3 Interface Description
9.3.1 Switch Virtual Interface (SVI) Descriptions
9.3.2 PortChannel Interface Descriptions
9.4 Software Requirements
9.4.1 Software Justifications
10 Logical Network Design
10.1 Network Design
10.2 VLAN
10.4 IP Addressing
10.4.1 Learning Center Address Allocation
10.4.2 IP Scheme
10.5 Infrastructure Routing
10.5.1 Quality of Service
10.5.2 IP Multicast
10.6 Infrastructure Security
10.6.1 Control Plane Policing
10.6.2 Storm Control

3. 10.6.3 DHCP Snooping
10.6.3.1 DHCP Scope Exhaustion
10.6.3.2 Rogue DHCP Server
10.6.3.3 DHCP Snooping Configuration guidelines

4. 2 Figures
Figure 1 Network Lay-out 23

5. 3 Tables
Table 1 Business Network 21

6. 4 Document Information
Author:
4.1 Review and Distribution
Organisation Name Title Organisation Name Title Organisation Name Title
4.2 Modification History
Rev Date Originator Status Comment

7. 5 Document Acceptance Certificate
Title:
Version:
Name _________________________ Name: ________________________
Title ________________________ Title ________________________
Company_______________________ Company_______________________
Signature ____________________ Signature ____________________
Date _________________________ Date _________________________
Name _________________________ Name: ________________________
Title ________________________ Title ________________________
Company_______________________ Company_______________________
Signature ____________________ Signature ____________________
Date _________________________ Date _________________________
Name _________________________ Name: ________________________
Title ________________________ Title ________________________
Company_______________________ Company_______________________
Signature ____________________ Signature ____________________
Date _________________________ Date _________________________

8. 6 About This Design Document
Author:
Reference Number:
6.1 Document Purpose
This document cover the Low Level Design of the Infrastructure related to
<name of network>. It discusses the physical and logical connectivity as well
as IP addressing. Furthermore, it outlines the layer 2 and layer 3 protocols
and features required to run the services in a redundant and available
manner.
6.2 Intended Audience
 <Your Stakeholders>
6.3 Scope
The scope of this document is only related to the <network>. The
configuration of devices outside this network is not in scope.
6.4 Scope
A Low Level Design Document (LLD) consists of a number of components. These
include
• Customer Requirements
• Generic Content
• Best Practice Guidance
• Customer Specific Content
There is an overall thread that brings these elements together as an
integrated document.
6.5 Assumptions and Caveats
There are several assumptions and caveats associated with any network
deployment. These are summarized below:
6.6 Related Documents
1. High Level Design
6.7 References
[REF-1] Cisco Product Documentation
http://www.cisco.com/univercd/cc/td/doc/product/index.htm

9. 7 Network Overview
< Give a brief history of the company/school>
7.1 Network Layout:
Figure 1 Network Lay-out

10. 7.2 Design Considerations
The following design principles have been considered in the preparation of
this design of Learning Center Network.
1. Scalability
2. Reliability
3. Availability
4. Manageability
5. Security
6. Performance
7. Network Stability

11. 8 Physical Network Design
8.1 Network Hardware Components
The following network lists the Bill of Quantities for the Business as
well as the Utility Networks.
8.1.1 Business Network
This section provides details about hardware that will be deployed in
<name> network.
Item Product No. Description Quantity
MDF
IDF – 1
Table 1 Business Network BoQ
8.2 LAN Wiring and Physical Lay-out
Figure 2 Sample Physical Topology

12. 8.3 Cut sheets
Figure #: Complete Logical Topology

13. Table #: Cut sheet for IDF -1

14. 9 Network Architecture
Refer to Figure. 1 High Level Network Architecture
In this network the 6509 serves as an aggregation/core device. This 6509 VSS
router comprises of two physical 6509s with 5
9.1.1 Network Connectivity
The following section explains how the equipment will be connected
together. Where possible, uplinks have been spread across multiple
modules to remove a Single Point of Failure (SPoF).
9.1.1.1 Line Card Placement in Core < model>
9.1.1.2 Core Switch
9.1.1.3 Core Switch to IPS connections

16. 9.2 Labelling Convention
The labeling convention will follow the host naming convention, with
the addition of the stack member number for devices in a Stack. It is
important to be able to refer to a switch in the stack as an
individual entity.
The switches in a stack will be labeled as follows:

17. 10 Logical Network Design
10.1 Network Design
< Make an explanation of the whole topology>
10.2 VLAN
The table below shows the VLAN scheme.

18. 10.4 IP Addressing
10.4.1 Address Allocation
The IP address space below will be implemented
10.5 Infrastructure Routing
<discuss the different routing protocols used>

19. 10.6 Infrastructure Security
10.6.1 Control Plane Policing
10.6.2 DHCP Snooping

20. 10.6.3 Dynamic ARP inspection
10.6.4 Port Security
10.7 Network Services
< talk about the different services such as DNS, DHCP relay>
10.8 Access Nework Design
10.9 Infrastructure Management