| Mask | Slash | Subnets and Range | Available hosts |
|---|---|---|---|
| .128 | /25 | 2sn à 128 | 126h |
| .129 | /26 | 4sn à 64 | 62h |
| .224 | /27 | 8sn à 32 | 30h |
| .240 | /28 | 16sn à 16 | 14h |
| .248 | /29 | 32sn à 8 | 6h |
| .252 | /30 | 64sn à 4 | 2h |
| .254 | /31 | 128sn à 2 |
0 - 15
16 - 31
32 - 47
48 - 63
64 - 79
80 - 95
96 - 111
112 - 127
128 - 143
144 - 159
160 - 175
176 - 191
192 - 207
208 - 223
224 - 239
240 - 255
Building 1, Town Hall, CS Department (Router)
G0/0 192.168.1.126 255.255.255.224 (2001:DB8:ACAD:A::1/64)
G0/1 192.168.1.158 255.255.255.240 (2001:DB8:ACAD:B::1/64)
Link Local FE80::1
Second Floor Switch, Administration Switch, LAB 214-A Switch (Switch)
VLAN 1
192.168.1.157 / 255.255.255.240
Default Gateway 192.168.1.158
Host1, Reception Host, 124-1
192.168.1.97 / 255.255.255.224
Default Gateway 192.168.1.126 / FE80::1
Host2, Operator Host, 124-5
192.168.1.98 / 255.255.255.224
Default Gateway 192.168.1.126 / FE80::1
Host3, IT Host, 214-1
192.168.1.145 / 255.255.255.240
Default Gateway 192.168.1.158 / FE80::1
TFTP Server
192.168.1.146 / 255.255.255.240
Default Gateway 192.168.1.158 / FE80::1
https://ccnav6.com/cidrvlsm-calculator-online
| Subnet | Hosts | Network | Begin | End | Mask | Assignment |
|---|---|---|---|---|---|---|
| 1 | 30 | 192.168.1.0 | 192.168.1.1 | 192.168.1.30 | 255.255.255.224 | |
| 2 | 30 | 192.168.1.32 | 192.168.1.33 | 192.168.1.62 | 255.255.255.224 | |
| 3 | 30 | 192.168.1.64 | 192.168.1.65 | 192.168.1.94 | 255.255.255.224 | |
| 4 | 30 | 192.168.1.96 | 192.168.1.97 | 192.168.1.126 | 255.255.255.224 | First Floor LAN Subnet, IT Department LAN Subnet |
| 5 | 14 | 192.168.1.128 | 192.168.1.129 | 192.168.1.142 | 255.255.255.240 | |
| 6 | 14 | 192.168.1.144 | 192.168.1.145 | 192.168.1.158 | 255.255.255.240 | Second Floor LAN Subnet, Administration LAN Subnet |
IPv4 192.168.1.97 255.255.255.224
GWv4 192.168.1.126
IPv6 2001:DB8:ACAD:A::FF / 64
GWv6 FE80::1
IPv4 192.168.1.98 255.255.255.224
GWv4 192.168.1.126
IPv6 2001:DB8:ACAD:A::15 / 64
GWv6 FE80::1
IPv4 192.168.1.145 255.255.255.240
GWv4 192.168.1.158
IPv6 2001:DB8:ACAD:B::FF / 64
GWv6 FE80::1
IPv4 192.168.1.146 255.255.255.240
GWv4 192.168.1.158
IPv6 2001:DB8:ACAD:B::15 / 64
GWv6 FE80::1
Use line console to connect Host 3 and Second Floor Switch.
On Host 3, go to "Desktop Tab" --> choice "Terminal"
enable
conf terminal
enable secret class12345
service password-encryption
banner motd $Second Floor Switch$
no ip domain-lookup
line console 0
password cisco12345
login
logging synchronous
exec-timeout 60
exit
line vty 0 15
password cisco12345
login
logging synchronous
exec-timeout 60
exit
interface vlan 1
ip address 192.168.1.157 255.255.255.240
no shutdown
ip default-gateway 192.168.1.158
exit
write
Use line console to connect Host 1 and Building 1 Router.
On Host 1, go to “Desktop Tab” –> choice “Terminal”
en
conf terminal
hostname Middle
enable secret class12345
service password-encryption
banner motd $This is Router$
security passwords min-length 10
login block-for 120 attempts 2 within 30
no ip domain-lookup
ip domain-name ccnav6.com
crypto key generate rsa
1024
line console 0
password cisco12345
login
logging synchronous
exec-timeout 60
exit
line vty 0 4
password cisco12345
transport input ssh
login local
logging synchronous
exec-timeout 60
exit
line aux 0
password cisco12345
login
logging synchronous
exec-timeout 60
exit
ip ssh version 2
ip ssh time-out 120
username netadmin privilege 15 secret Cisco_CCNA5
interface g0/0
ip address 192.168.1.126 255.255.255.224
description First Floor LAN
ipv6 address 2001:DB8:ACAD:A::1/64
ipv6 address fe80::1 link-local
no shutdown
exit
interface g0/1
ip address 192.168.1.158 255.255.255.240
description Second Floor LAN
ipv6 address 2001:DB8:ACAD:B::1/64
ipv6 address fe80::1 link-local
no shutdown
exit
ipv6 unicast-routing
exit
write
copy running-config tftp:
192.168.1.146