Network Design
By Rejo0588
October 2, 2013
Problem Description:
You are have been assigned the net block 72.128.30.0/23 by your ISP; to design a network for a small business which consists of three sites:
Site A
6 offices which need to support up to 30 hosts each.
Site B
3 research labs with 25 hosts each.
Site C
1 support office with 10 workstations.
At site C you also have 14 servers behind a router/firewall. These servers are to be firewalled from internal as well as external hosts.
Site A links to the ISP via a dedicated Serial Interface.
Site A links to site B via a dedicated Serial Interface.
Site B links to site C via a dedicated Serial Interface.
5 Routers with 8 100Mbps Ethernet interfaces
Fa0/0 Fa0/1 Fa0/2 Fa0/3 Fa0/4 Fa0/5 Fa0/6 Fa0/7
and one serial interface Se0.
1 (and only one) Router/firewall with two 100Mbps Ethernet interfaces eth0 and eth1.
Unlimited amounts of 100Mbit Manageable Fast Ethernet switches in the following sizes: 48 ports 24 ports 8 ports.
Subnet/ address assignment
Site A:
72.128.31.0/24 - supports 256 addresses (254 usable)
72.128.31.254 is bRouter address on this subnet ( interface fa0/0)
72.128.31.253 is Router1 address on this subnet ( interface fa0/0) 72.128.30.252 is a 8-port switch (Switch1) on this subnet 72.128.30.251 is a 48-port switch (Switch2) on this subnet 72.128.30.250 is a 48-port switch (Switch3) on this subnet
72.128.30.249 is a 48-port switch (Switch4) on this subnet
72.128.30.248 is a 48-port switch (Switch5) on this subnet
All other IP’s are available for workstations
Site B:
72.128.30.0/25 - supports 128 addresses (126 usable)
72.128.30.126 is Router2 address on this subnet (interface fa0/0) 72.128.30.125 is Router3 address on this subnet (interface fa0/0) 72.128.30.124 is a 8-port switch (Switch6) on this subnet 72.128.30.123 is a 48-port switch (Switch7) on this subnet 72.128.30.122 is a 48-port switch (Switch8) on this subnet...