Посчитаем те сети которые даны:
office1:
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.2.0/26
Address: 192.168.2.0 11000000.10101000.00000010.00 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.2.0/26 11000000.10101000.00000010.00 000000
HostMin: 192.168.2.1 11000000.10101000.00000010.00 000001
HostMax: 192.168.2.62 11000000.10101000.00000010.00 111110
Broadcast: 192.168.2.63 11000000.10101000.00000010.00 111111
Hosts/Net: 62 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.2.64/26
Address: 192.168.2.64 11000000.10101000.00000010.01 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.2.64/26 11000000.10101000.00000010.01 000000
HostMin: 192.168.2.65 11000000.10101000.00000010.01 000001
HostMax: 192.168.2.126 11000000.10101000.00000010.01 111110
Broadcast: 192.168.2.127 11000000.10101000.00000010.01 111111
Hosts/Net: 62 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.2.128/26
Address: 192.168.2.128 11000000.10101000.00000010.10 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.2.128/26 11000000.10101000.00000010.10 000000
HostMin: 192.168.2.129 11000000.10101000.00000010.10 000001
HostMax: 192.168.2.190 11000000.10101000.00000010.10 111110
Broadcast: 192.168.2.191 11000000.10101000.00000010.10 111111
Hosts/Net: 62 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.2.192/26
Address: 192.168.2.192 11000000.10101000.00000010.11 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.2.192/26 11000000.10101000.00000010.11 000000
HostMin: 192.168.2.193 11000000.10101000.00000010.11 000001
HostMax: 192.168.2.254 11000000.10101000.00000010.11 111110
Broadcast: 192.168.2.255 11000000.10101000.00000010.11 111111
Hosts/Net: 62 Class C, Private Internetoffice2:
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.1.0/25
Address: 192.168.1.0 11000000.10101000.00000001.0 0000000
Netmask: 255.255.255.128 = 25 11111111.11111111.11111111.1 0000000
Wildcard: 0.0.0.127 00000000.00000000.00000000.0 1111111
=>
Network: 192.168.1.0/25 11000000.10101000.00000001.0 0000000
HostMin: 192.168.1.1 11000000.10101000.00000001.0 0000001
HostMax: 192.168.1.126 11000000.10101000.00000001.0 1111110
Broadcast: 192.168.1.127 11000000.10101000.00000001.0 1111111
Hosts/Net: 126 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.1.128/26
Address: 192.168.1.128 11000000.10101000.00000001.10 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.1.128/26 11000000.10101000.00000001.10 000000
HostMin: 192.168.1.129 11000000.10101000.00000001.10 000001
HostMax: 192.168.1.190 11000000.10101000.00000001.10 111110
Broadcast: 192.168.1.191 11000000.10101000.00000001.10 111111
Hosts/Net: 62 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.1.192/26
Address: 192.168.1.192 11000000.10101000.00000001.11 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.1.192/26 11000000.10101000.00000001.11 000000
HostMin: 192.168.1.193 11000000.10101000.00000001.11 000001
HostMax: 192.168.1.254 11000000.10101000.00000001.11 111110
Broadcast: 192.168.1.255 11000000.10101000.00000001.11 111111
Hosts/Net: 62 Class C, Private Internetcentral:
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.0/28
Address: 192.168.0.0 11000000.10101000.00000000.0000 0000
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Wildcard: 0.0.0.15 00000000.00000000.00000000.0000 1111
=>
Network: 192.168.0.0/28 11000000.10101000.00000000.0000 0000
HostMin: 192.168.0.1 11000000.10101000.00000000.0000 0001
HostMax: 192.168.0.14 11000000.10101000.00000000.0000 1110
Broadcast: 192.168.0.15 11000000.10101000.00000000.0000 1111
Hosts/Net: 14 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.32/28
Address: 192.168.0.32 11000000.10101000.00000000.0010 0000
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Wildcard: 0.0.0.15 00000000.00000000.00000000.0000 1111
=>
Network: 192.168.0.32/28 11000000.10101000.00000000.0010 0000
HostMin: 192.168.0.33 11000000.10101000.00000000.0010 0001
HostMax: 192.168.0.46 11000000.10101000.00000000.0010 1110
Broadcast: 192.168.0.47 11000000.10101000.00000000.0010 1111
Hosts/Net: 14 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.64/26
Address: 192.168.0.64 11000000.10101000.00000000.01 000000
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Wildcard: 0.0.0.63 00000000.00000000.00000000.00 111111
=>
Network: 192.168.0.64/26 11000000.10101000.00000000.01 000000
HostMin: 192.168.0.65 11000000.10101000.00000000.01 000001
HostMax: 192.168.0.126 11000000.10101000.00000000.01 111110
Broadcast: 192.168.0.127 11000000.10101000.00000000.01 111111
Hosts/Net: 62 Class C, Private InternetСвободные подсети есть только на центральном роутере:
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.16/28
Address: 192.168.0.16 11000000.10101000.00000000.0001 0000
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Wildcard: 0.0.0.15 00000000.00000000.00000000.0000 1111
=>
Network: 192.168.0.16/28 11000000.10101000.00000000.0001 0000
HostMin: 192.168.0.17 11000000.10101000.00000000.0001 0001
HostMax: 192.168.0.30 11000000.10101000.00000000.0001 1110
Broadcast: 192.168.0.31 11000000.10101000.00000000.0001 1111
Hosts/Net: 14 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.48/28
Address: 192.168.0.48 11000000.10101000.00000000.0011 0000
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Wildcard: 0.0.0.15 00000000.00000000.00000000.0000 1111
=>
Network: 192.168.0.48/28 11000000.10101000.00000000.0011 0000
HostMin: 192.168.0.49 11000000.10101000.00000000.0011 0001
HostMax: 192.168.0.62 11000000.10101000.00000000.0011 1110
Broadcast: 192.168.0.63 11000000.10101000.00000000.0011 1111
Hosts/Net: 14 Class C, Private Internet
alekho@ubuntu2004:~/OTUS/25_network$ ipcalc 192.168.0.128/25
Address: 192.168.0.128 11000000.10101000.00000000.1 0000000
Netmask: 255.255.255.128 = 25 11111111.11111111.11111111.1 0000000
Wildcard: 0.0.0.127 00000000.00000000.00000000.0 1111111
=>
Network: 192.168.0.128/25 11000000.10101000.00000000.1 0000000
HostMin: 192.168.0.129 11000000.10101000.00000000.1 0000001
HostMax: 192.168.0.254 11000000.10101000.00000000.1 1111110
Broadcast: 192.168.0.255 11000000.10101000.00000000.1 1111111
Hosts/Net: 126 Class C, Private InternetНа других роутерах свободных подсетей нет.
Ошибок при разбиении нет.
[vagrant@office1Server ~]$ ping ya.ru
PING ya.ru (87.250.250.242) 56(84) bytes of data.
64 bytes from ya.ru (87.250.250.242): icmp_seq=1 ttl=57 time=20.2 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=2 ttl=57 time=23.5 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=3 ttl=57 time=26.3 ms
^C
--- ya.ru ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 20.253/23.384/26.343/2.492 ms
[vagrant@office1Server ~]$ tracepath -n ya.ru
1?: [LOCALHOST] pmtu 1500
1: 192.168.2.65 0.723ms
1: 192.168.2.65 0.800ms
2: 192.168.200.2 1.090ms
3: 192.168.255.1 1.473ms
4: no reply
^C[vagrant@office2Server ~]$ ping ya.ru
PING ya.ru (87.250.250.242) 56(84) bytes of data.
64 bytes from ya.ru (87.250.250.242): icmp_seq=1 ttl=57 time=21.4 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=2 ttl=57 time=20.2 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=3 ttl=57 time=20.3 ms
^C
--- ya.ru ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 20.297/20.690/21.445/0.558 ms
[vagrant@office2Server ~]$ tracepath -n ya.ru
1?: [LOCALHOST] pmtu 1500
1: 192.168.1.129 0.513ms
1: 192.168.1.129 0.310ms
2: 192.168.100.2 0.586ms
3: 192.168.255.1 0.874ms
^C[vagrant@centralServer ~]$ ping ya.ru
PING ya.ru (87.250.250.242) 56(84) bytes of data.
64 bytes from ya.ru (87.250.250.242): icmp_seq=1 ttl=59 time=20.2 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=2 ttl=59 time=20.4 ms
64 bytes from ya.ru (87.250.250.242): icmp_seq=3 ttl=59 time=24.6 ms
^C
--- ya.ru ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 20.227/21.785/24.660/2.038 ms
[vagrant@centralServer ~]$ tracepath -n ya.ru
1?: [LOCALHOST] pmtu 1500
1: 192.168.0.1 0.645ms
1: 192.168.0.1 0.620ms
2: 192.168.255.1 0.983ms
3: no reply
^C