• 什么是主机路由？禁止RIP 接收主机路由

在某些特殊情况下，路由器会收到大量来自同一网段的主机路由，这些路由对于路由寻址没有多少作用，却占用了大量网络资源。配置了禁止主机路由功能后，路由器将拒绝它所收到的主机路由。

IGP

The Routing Information Protocol (RIP) is an interior gateway protocol (IGP)

IP Routing Fundamentals

You can find detailed information about RIP in IP Routing Fundamentals, published by Cisco Press.

default network path

If the router has a default network path, RIP advertises a route that links the router to the pseudonetwork 0.0.0.0. The 0.0.0.0 network does not exist; it is treated by RIP as a network to implement the default routing feature. The switch advertises the default network if a default was learned by RIP or if the router has a gateway of last resort and RIP is configured with a default metric. RIP sends updates to the interfaces in specified networks. If an interface’s network is not specified, it is not advertised in any RIP update.

wildcard-mask，接下来我们应输入wildcard-mask，即为子网掩码的反码，但我司的实现却是输入子网掩码