IT. Support Networking Threaded Case Study School: R.E. Miller By: Shane Coyne. Andrea Martyn. Gary Hall. Barry Gray. Presented by: Gary Hall & Andrea Martyn On Fri 6 th June 11:45am

WAN TOPOLOGY (Wide Area Network)

SECTION 1. Wide Area Network (WAN) The WAN will connect the schools and the administrative offices with the district office for the purpose of delivering data The WAN will be based on two layer hierarchical model. TCP/IP & Novell IPX are the only protocols accepted for WAN IGRP is the routing protocol we used for the WAN 3 Regional Hubs. Phoenix N. W (data centre) Greenway (service centre) Shaw Butte school

Logical Addressing Scheme We have decided to use a class c addressing scheme We have decided to use a class c addressing scheme x – students x – students x – teachers/admin x – teachers/admin

LAN TOPOLOGY (Local Area Network)

Local Area Network ( LAN ) & Wiring Scheme Cable types for transport: 1) Ethernet 10base-t 2) 100base-TX3) 100base-FX Horizontal cabling: cat 5 unshielded twisted pair(100mb) Vertical (backbone) cabling: fiber optic multimode cable MDF at central point of LAN (all cabling will be terminated here) POP (point of presence) for wan will be at the MDF. Routers/LAN switches will be placed in the MDF There will be three IDFs at the re miller Each room must have 4 cat 5 UTP cable runs, with one terminated at the teachers workstation. The other three are for the students. A total of 325 computers will be installed at the R.E.Miller school.

Servers DNS/ Server Each school will contain a host for DNS and service (local post office / mail server) Enterprise Server. (One Machine can handle both DNS and ) DNS update process will flow from individual school to the hub server then to the district hub. All regional Hubs can use Mesh topology.

Administrative Server Each School should contain an Administrative Server. Server will run TCP/IP as its OSI Layer 3 & 4 protocols. Library Server Online information / retrieval system (Enterprise Server). Uses Layers 3 & 4 (TCP/IP) of the OSI model. Application Server Located at central location (Enterprise Server). Will run programs such as word, excel, and power point. Other Servers All other servers will be departmental servers (Workgroup Servers).

Security Utilize a double firewall implementation. Internet-exposed applications residing on a public backbone network. All connections initiated from the Internet into the schools private network will be refused. 3 logical network classifications: administrative, curriculum, and external (with secured connections between them) 2 physical LAN infrastructures 1 administrative and 1 curriculum. Place each server according to its function and placed on the appropriate LAN. Each School should have a file server. Using ACL on routers all traffic from the curriculum LAN will be prohibited on the admins LAN. and directory service should pass freely between the two physical LANS. ACL’s are to be controlled at the District office (TFTP). A user ID and Password policy will be published and strictly enforced on all computers

LAN TOPOLOGY (Local Area Network)

Main Distribution Facility (MDF)  The storage space which contains the hardware for the main hub of the network.  In the next floor plan, the rooms shaded in blue represent data media termination points. The Red shaded represents the POP. This will also be the location of the MDF (Main Distribution Facility).

MDF

Intermediate distribution facility (IDF)  The central point of a star topology where the hub is located.  There should be one on each floor and/or within a 1000 sq. meter radius.

(IDF)

In this room, the location of the MDF to the rooms is more than 90m, so two IDFs are needed to connect the rooms. The green shading represents the rooms connected with the IDF to the far left.

Wiring Diagram

Logical Topology (Star Topology)

Equipment required Server: 1.5GHz Intel® Pentium® 4 Processor with 512MB Ram, an ATI Radeon 32Mb Video and 80GB of Drive Space.

Switch: 24-port 10/100 Base-TX Fast Ethernet Switch.

Patch Panel: CTG's Enhanced CAT5 with 110-Type termination, meeting and exceeding EIA/TIA TSB-40 CAT5e connecting hardware specifications.

Why use Vlans?  They logically segment the Network  Can use existing hubs & switches  Control Broadcasts ( prevent who the data is sent to Eg prevent students getting access to the administration network)  Save money because less administration depending on if port centric, static or dynamic

VLAN’s Two VLANS are required  Curriculum –Student  Administrative – Teachers, Admin staff

Access Control Lists (ACL’s)  Allows us to permit or deny users / or an entire network from the network.  Limits traffic on the Network, therefore increasing the network performance.  Can be standard (1-99) or Extended ( )

Who gets Access to what?  Students Access –Application Sever –Internet –Library  Students Denied –Activity on the DNS server –Administrative server  Teachers Access –Internet –DNS server for –Administrative server –Application server –Library server

Sample ACL  This prevents students accessing the administration network  Access-list 101 deny ip  Permit any any  Int EO  Access group 101 in  Exit

Interior Gateway Routing Protocol (IGRP) A proprietary interior gateway protocol used to exchange information between Cisco systems routers. Is responsible for sending & receiving enhanced IGRP packets

IGRP Configuration Done at global config mode Re_Miller(config)# router igrp 108 Re_Miller(config)# Network Re_Miller(config)# Network Re_Miller(config)# Exit

Pro’s  The benefits of setting up the network as shown are: –Speed: with fiber going to each switch, there is 1 gigabit of bandwidth available with possible improvements in technology. –Less interference: fiber has less interference from magnetic fields, etc. –Non-centralized: control is closer, if there is a local problem –Room for future growth in LAN and WAN.

Con’s  The negative aspects of setting up the network as shown are: –Non-centralized: with an IDF in each building there may be difficulty locating a problem. –Varied equipment: with 4 different models of switches there will be additional programming time needed. –Cost: the quantity of switches and fiber needed has increased the cost. –Security: with many locations, there is more of a possibility of break-in or theft.