在Linux 中如何使用 Sipcalc 來計算 IP 子網

安    裝

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在Centos8中安裝sipcalc之前，需要先安裝epel源。：

[root@localhost ~]# yum -y install epel-release
[root@localhost ~]# yum -y install sipcalc      

sipcalc 使用方式

下面使用 sipcalc 列出一個标準 24 位的 C 類網絡示例：

[root@localhost ~]# sipcalc 192.168.10.0/24
-[ipv4 : 192.168.10.0/24] - 0
[CIDR]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network mask  - 255.255.255.0
Network mask (bits) - 24
Network mask (hex) - FFFFFF00
Broadcast address - 192.168.10.255
Cisco wildcard  - 0.0.0.255
Addresses in network - 256
Network range  - 192.168.10.0 - 192.168.10.255
Usable range  - 192.168.10.1 - 192.168.10.254      

可以看到列出了192.168.10.0/24網段中廣播位址、反掩碼、網絡範圍和可用的IP位址範圍。

下面添加

-a

檢視一下：

[root@localhost ~]# sipcalc -a 192.168.10.0/24
-[ipv4 : 192.168.10.0/24] - 0
[Classful]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network class  - C
Network mask  - 255.255.255.0
Network mask (hex) - FFFFFF00
Broadcast address - 192.168.10.255
[CIDR]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network mask  - 255.255.255.0
Network mask (bits) - 24
Network mask (hex) - FFFFFF00
Broadcast address - 192.168.10.255
Cisco wildcard  - 0.0.0.255
Addresses in network - 256
Network range  - 192.168.10.0 - 192.168.10.255
Usable range  - 192.168.10.1 - 192.168.10.254
[Classful bitmaps]
Network address  - 11000000.10101000.00001010.00000000
Network mask  - 11111111.11111111.11111111.00000000
[CIDR bitmaps]
Host address  - 11000000.10101000.00001010.00000000
Network address  - 11000000.10101000.00001010.00000000
Network mask  - 11111111.11111111.11111111.00000000
Broadcast address - 11000000.10101000.00001010.11111111
Cisco wildcard  - 00000000.00000000.00000000.11111111
Network range  - 11000000.10101000.00001010.00000000 -
11000000.10101000.00001010.11111111
Usable range  - 11000000.10101000.00001010.00000001 -
11000000.10101000.00001010.11111110
[Networks]
Network   - 192.168.10.0    - 192.168.10.255 (current)      

可以看到可以看到192.168.10.0網段的有類路由和無類路由的二進制形式。

下面使用一個27為掩碼的網段：

[root@localhost ~]# sipcalc 192.168.10.0/27
-[ipv4 : 192.168.10.0/27] - 0
[CIDR]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network mask  - 255.255.255.224
Network mask (bits) - 27
Network mask (hex) - FFFFFFE0
Broadcast address - 192.168.10.31
Cisco wildcard  - 0.0.0.31
Addresses in network - 32
Network range  - 192.168.10.0 - 192.168.10.31
Usable range  - 192.168.10.1 - 192.168.10.30      

可以看到可用位址為192.168.10.1-192.168.10.30

添加

-a

選項，可以看到可用的網段有哪些：

[root@localhost ~]# sipcalc 192.168.10.0/27 -a
-[ipv4 : 192.168.10.0/27] - 0
[Classful]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network class  - C
Network mask  - 255.255.255.0
Network mask (hex) - FFFFFF00
Broadcast address - 192.168.10.255
[CIDR]
Host address  - 192.168.10.0
Host address (decimal) - 3232238080
Host address (hex) - C0A80A00
Network address  - 192.168.10.0
Network mask  - 255.255.255.224
Network mask (bits) - 27
Network mask (hex) - FFFFFFE0
Broadcast address - 192.168.10.31
Cisco wildcard  - 0.0.0.31
Addresses in network - 32
Network range  - 192.168.10.0 - 192.168.10.31
Usable range  - 192.168.10.1 - 192.168.10.30
[Classful bitmaps]
Network address  - 11000000.10101000.00001010.00000000
Network mask  - 11111111.11111111.11111111.00000000
[CIDR bitmaps]
Host address  - 11000000.10101000.00001010.00000000
Network address  - 11000000.10101000.00001010.00000000
Network mask  - 11111111.11111111.11111111.11100000
Broadcast address - 11000000.10101000.00001010.00011111
Cisco wildcard  - 00000000.00000000.00000000.00011111
Network range  - 11000000.10101000.00001010.00000000 -
11000000.10101000.00001010.00011111
Usable range  - 11000000.10101000.00001010.00000001 -
11000000.10101000.00001010.00011110
[Networks]
Network   - 192.168.10.0    - 192.168.10.31 (current)
Network   - 192.168.10.32   - 192.168.10.63
Network   - 192.168.10.64   - 192.168.10.95
Network   - 192.168.10.96   - 192.168.10.127
Network   - 192.168.10.128  - 192.168.10.159
Network   - 192.168.10.160  - 192.168.10.191
Network   - 192.168.10.192  - 192.168.10.223
Network   - 192.168.10.224  - 192.168.10.255