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CCNA Semester 4 Threaded Case Study
WAN Information

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Project Scenario
WAN Information
Belfast Configuration
Cork Configuration
Cork_LAN Configuration
Galway Configuration
Limerick Configuration
Frame Relay Configuration
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topology.jpg

Here is the topology of the case study. 

Network Description

 

Galway LAN

The specifications of the Galway LAN ACL are basic. The ACL is to prohibit the hosts of the Galway LAN from access past the Galway LAN router, unless the application protocol is HTTP of the port number 80. The critical aspect of the ACL is not to affect the communications of the Galway LAN with the rest of the network. For that reason the ACL will be placed on the inbound direction of the ethernet 0 interface on the Galway router. The ACL will deny access to the ISP, unless port 80 is used, and permit everything else. This ensures less latency than on another router and network simplicity.

 

IP Scheme

The IP scheme for this network needs to satisfy the large number of users for the different logical groups. The Galway LAN has 512 devices, while the Cork LAN has 750. In order to accommodate these large groups, two subnets are created using 10 bits for the hosts, enabling a possible 1022 IP address per subnet. This ensures that a valid amount of IP addresses is available not only for present devices but for future expansion as well. The IP address is then subnetted further for the serial links until 2 bits are used for the hosts.

Phase 1: Addressing the WAN
Name Interface/Subnet Mask
Limerick S0 172.12.16.1/30
Cork E0 172.6.12.13/30
Cork S0 172.16.12.9/30
Cork S1 172.16.12.6/30
Galway E0 172.16.4.1/22
Galway S0 172.16.12.10/30
Belfast E0 10.0.0.1/8
Belfast S0 172.16.12.5/30
Belfast S1 172.16.12.2/30
Galway DHCP Pool 172.16.4.1/22 172.16.7.254/22
Cork LAN 172.16.8.1/22 172.16.11.254/22
Frame_Relay S0 172.16.12.21/30
Frame_Relay S1 172.16.12.22/30

 

Network Information
Item Configured Values
Belfast: Name of NAT pool public_access
Belfast:ACL number 1
ACL number for ACL filtering Galway LAN traffic 101
Router for ACL filtering Galway LAN traffic Galway
Configured port for ACL filtering Galway LAN traffic E0
Configured direction for ACL filtering Galway LAN traffic out
ISP Server IP address 10.0.0.2/8
ISP Server subnet mask 255.0.0.0
ISP Server default gateway 10.0.0.1/8
Filename of wab page on ISP Server c:/test.html

ISP Information

 

Router: ISP

IP Address: 10.0.0.2/8

Default Gateway: 10.0.0.1/8

 

Project Scenario

Belfast Configuration