32-bit unsigned integers

32-bit unsigned integers range from 0 to 4294967295.


A way to specify an IPv4 netmask using an integer from 0 to 32 and an IPv6 netmask using an integer from 0 to 128.

Epoch seconds

The number of seconds since midnight UTC on January 1, 1970.


An FQDN consists of the host name followed by the domain name (Example:

Unless otherwise specified, FQDNs are limited to 256 characters.

IPv4 Address

An IPv4 address is a 32-bit number in dotted decimal notation. It consists of four 8-bit groups of decimal digits separated by decimal points (Example:

IPv6 Address

An IPv6 address is a string that consists of eight groups of four hexadecimal digits in which each group is separated by a colon (:) (Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

Various shortcuts exist to shorten the string representation of an IPv6 address. For example, you can omit the leading zeros of each group and replace one or any number of consecutive groups of 0 value with two colons(::). The previous example can be re-written as 2001:db8:85a3::8a2e:370:7334.

Override/use flags

If a field has an associated use flag, it becomes effective only if the corresponding use flag is set to True. Otherwise, the default inherited from the “parent” is applied(this could be either the parent or Grid-level object).

When a field is first set to a value and the associated use flag is false, it will be automatically set to true.

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