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。Sipcalc 的开发始于 2001 年，它具有我们想要的 ip 计算器的大部分功能。
安 装
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
sipcalc 使用方式
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
