This IP subnet calculator covers both IPv4 and IPv6 protocols, providing information such as IP address, network address, subnet mask, IP range, and more.

2011年2月7日 · Using a /31 subnet mask helps conserve your IP address space for point to point links. It doubles the number of links that you can number from a given block of addresses. Think of large organisations that have hundreds of WAN …

2024年8月23日 · The /31 subnet mask, in particular, showcases unique functionality, especially valuable in specific networking scenarios like point-to-point links. Let's dive into what a /31 subnet mask is, its distinct role in networking environments, …

31位掩码长度仅适用于点对点链路，非点对点接口无法配置，如果能配置31位长度的掩码，那路由转发也是和正常一样的。

2023年12月28日 · 简单总结一下，30位掩码长度的互联地址还是比较规范的使用方式，部分场景下可能可以配置网络号到接口上，但通信 异常。 31位掩码长度仅适用于点对点链路，非点对点接口无法配置，如果能配置31位长度的掩码，那路由转发也是和正常一样的。 长按二维码

RFC3021的标题是《Using 31-Bit Prefixes on IPv4 Point-to-Point Links》（在IPv4点对点链路中的使用31位网络前缀），发布于2000年的12月，距今已有23年，可以说，已经成为了事实上的标准。

2018年7月23日 · With a /31 subnet, we are left with zero usable hosts. The /31 subnet only has two hosts - one for network and another for broadcast. I am wondering why would someone ever use this subnet.

Hello Tarantula--a /31 is a two-address subnet. It is used for addressing P2P links, and is often used in data centers for underlay configuration. For example, below is the config on a port-channel linking a leaf to a spine. In this example, the spine would be configured with the IP address 172.16.0.12/31.

2024年8月23日 · The process of setting up a /31 subnet mask on Cisco devices is straightforward but requires precise execution of CLI (Command Line Interface) commands. Here’s a breakdown for configuring a Cisco router’s interface:

A 31-bit subnet mask is often used for an interface that is the endpoint of a point-to-point network. The use of 31-bit subnet masks for IPv4 point-to-point links is described in RFC 3021. For 192.168.0.0 Router A is connected via Fast-ethernet 0/0 having ip 192.168.0.0/31 to Fast-ethernet 0/0 having ip 192.168.0.1/31 of Router B.