Linux中如何使用Sipcalc计算IP子网

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在 Centos8 中安装 sipcalc 之前，需要先安装 epel 源。：

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

下面使用 sipcalc 列出一个标准 24 位的 C 类网络示例：

[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 网段中广播地址、反掩码、网络范围和可用的 IP 地址范围。

下面添加 -a 查看一下：

[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 网段的有类路由和无类路由的二进制形式。

下面使用一个 27 为掩码的网段：

[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

可以看到可用地址为 192.168.10.1-192.168.10.30

添加 -a 选项，可以看到可用的网段有哪些：

[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

Sipcalc 是一个命令行 ip 子网计算器，支持 IPv4 和 IPv6，它会显示你填写 DHCP 信息或设置静态 IP 地址所需的所有 IP 相关信息。