Dada a rede:
146.164.0.0/16 (classe b)
255.255.0.0 (mascara padrão classe b)
Preciso de 1800 hosts
[1]
Qual numero sendo 2^X preciso para 1800 host ?
2^11=2048 logo dá para 1800
bits na classe B
11111111 11111111 00000000 00000000
[2]
Quantos bits preciso roubar dos hosts para não desperdiçar IPs?
11 bits, logo preciso 3+8 (em vermelho) deixando 5 (em azul) para sub rede. Logo roubo 5 bits (azul sublinhado) que eram de host para serem sub-rede.
11111111 11111111 11111000 00000000
logo fica 255.255.248.0 ou /21 (bits de rede)
[3] Quantas sub net poderei ter ?
Como tenho 5 bits pra usar como subnets (em azul sublinhado) terei 32 ou seja 2^5=32
[4] Quais os ranges de sub redes que poderei dividir ?
Sabendo que cada rede tem 2048 hosts ocupando 11 bits (2^11) ou seja 3 no terceiro + 8 no quarto e ultimo octeto +. Somando 8.0 (2^3) de rede em rede.
Subrede |
Hosts válidos |
Broadcast |
|
01 |
146.164.0.0 |
146.164.0.1 to 146.164.7.254 |
146.164.7.255 |
02 |
146.164.8.0 |
146.164.8.1 to 146.164.15.254 |
146.164.15.255 |
03 |
146.164.16.0 |
146.164.16.1 to 146.164.23.254 |
146.164.23.255 |
04 |
146.164.24.0 |
146.164.24.1 to 146.164.31.254 |
146.164.31.255 |
05 |
146.164.32.0 |
146.164.32.1 to 146.164.39.254 |
146.164.39.255 |
06 |
146.164.40.0 |
146.164.40.1 to 146.164.47.254 |
146.164.47.255 |
07 |
146.164.48.0 |
146.164.48.1 to 146.164.55.254 |
146.164.55.255 |
08 |
146.164.56.0 |
146.164.56.1 to 146.164.63.254 |
146.164.63.255 |
09 |
146.164.64.0 |
146.164.64.1 to 146.164.71.254 |
146.164.71.255 |
10 |
146.164.72.0 |
146.164.72.1 to 146.164.79.254 |
146.164.79.255 |
11 |
146.164.80.0 |
146.164.80.1 to 146.164.87.254 |
146.164.87.255 |
12 |
146.164.88.0 |
146.164.88.1 to 146.164.95.254 |
146.164.95.255 |
13 |
146.164.96.0 |
146.164.96.1 to 146.164.103.254 |
146.164.103.255 |
14 |
146.164.104.0 |
146.164.104.1 to 146.164.111.254 |
146.164.111.255 |
15 |
146.164.112.0 |
146.164.112.1 to 146.164.119.254 |
146.164.119.255 |
16 |
146.164.120.0 |
146.164.120.1 to 146.164.127.254 |
146.164.127.255 |
17 |
146.164.128.0 |
146.164.128.1 to 146.164.135.254 |
146.164.135.255 |
18 |
146.164.136.0 |
146.164.136.1 to 146.164.143.254 |
146.164.143.255 |
19 |
146.164.144.0 |
146.164.144.1 to 146.164.151.254 |
146.164.151.255 |
20 |
146.164.152.0 |
146.164.152.1 to 146.164.159.254 |
146.164.159.255 |
21 |
146.164.160.0 |
146.164.160.1 to 146.164.167.254 |
146.164.167.255 |
22 |
146.164.168.0 |
146.164.168.1 to 146.164.175.254 |
146.164.175.255 |
23 |
146.164.176.0 |
146.164.176.1 to 146.164.183.254 |
146.164.183.255 |
24 |
146.164.184.0 |
146.164.184.1 to 146.164.191.254 |
146.164.191.255 |
25 |
146.164.192.0 |
146.164.192.1 to 146.164.199.254 |
146.164.199.255 |
26 |
146.164.200.0 |
146.164.192.1 to 146.164.207.254 |
146.164.207.255 |
27 |
146.164.208.0 |
146.164.192.1 to 146.164.215.254 |
146.164.215.255 |
28 |
146.164.216.0 |
146.164.192.1 to 146.164.223.254 |
146.164.223.255 |
29 |
146.164.224.0 |
146.164.192.1 to 146.164.231.254 |
146.164.231.255 |
30 |
146.164.232.0 |
146.164.192.1 to 146.164.239.254 |
146.164.239.255 |
31 |
146.164.240.0 |
146.164.192.1 to 146.164.247.254 |
146.164.247.255 |
32 |
146.164.248.0 |
146.164.192.1 to 146.164.255.254 |
146.164.255.255 |