SonicOS 7 System

31-Bit Network Settings

SonicOS includes support for RFC 3021 that defines the use of a 31-bit subnet mask. This mask allows only two host addresses in the subnet, with no network or gateway addresses and no broadcast address. Such a configuration can be used within a larger network to connect two hosts with a point-to-point link. The savings in address space as a result of this change is recognizable as each point-to-point link in a large network would consume only two addresses instead of four.

In this context, the point-to-point link is not equivalent to PPP (point to point protocol). A point-to-point link using a 31-bit mask can use or not use the PPP protocol. 31-bit prefixed IPv4 addresses on a point-to-point link can also be used in the Ethernet network.

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