Class A, B, and C addresses have 8-, 16-, and 24-bit. WatchGuard and the WatchGuard logo are registered trademarks or trademarks of WatchGuard Technologies in the United States and/or other countries. The length of the network identifier (NETID) part of the address determines an IP address classification. Because you cannot configure a virtual external interface with a default gateway on a different subnet, you cannot use a /32 subnet mask for a virtual external interface, such as a VLAN or Link Aggregation interface. In mixed routing mode, you can only configure a 32-bit subnet mask for a physical external interface.

32-bit Subnet Mask (/32)ДЄ 32-bit subnet mask defines a network with only one IPВ address. The use of 31-bit subnet masks for IPv4 point-to-point links is described in RFC 3021. A 31-bit subnet mask is often used for an interface that is the endpoint of a point-to-point network. In mixed routing mode, you can configure any external interface to use an IPv4 address with a 31-bit subnet mask.

This component is known as a subnet mask.In other words, in an IP address, how many bits are used in the network address and how many bits are left for the host address is determined by the subnet mask. For information about slash notation, see About Slash Notation. SubnetвЂ™CheatвЂ™SheetвЂ™ вЂ™ CIDRвЂ™ TotalвЂ™ofвЂ™AddressesвЂ™ HostsвЂ™ NetmaskвЂ™ /30вЂ™ 4' 2' 255.255.255.252' /29вЂ™ 8' 6' 255.255.255.248' /28вЂ™ 16' 14' 255. To separate network addresses from host addresses, IPv4 uses an additional component with IP addresses. When you configure an IP address, you specify the subnet mask in slash notation. 31-bit and 32-bit subnet masks are supported in Fireware v12.1 and higher for secondary external interfaces. Part 3 is a bit rarer: itTo be fully functional, PCI passthrough support in. If your Firebox is configured in mixed routing mode, you can configure an external interface to use an IPv4 address with a 31-bit or 32-bit subnet mask.ДЈ1-bit and 32-bit subnet masks are supported in Fireware XTMВ v11.9.4 and higher for primary external interfaces. 3 The mode should be set to AP, and the name of the wireless network being. To conserve IPv4В addresses, some Internet Service Providers assign IPv4 addresses with a /31 or /32 subnet mask.

Blank subnet mask table