Static route types

You can configure the following types of static IP routes:

Standard

The static route consists of a destination network address or host, a corresponding network mask, and the IP address of the next-hop IP address.

Null (discard)

The null route consists of the destination network address or host, a corresponding network mask, and either the reject or blackhole keyword. Typically, the null route is configured as a backup route for discarding traffic if the primary route is unavailable. By default, when IP routing is enabled, a route for the 127.0.0.0/8 network is created to the null interface. Traffic to this interface is rejected (dropped).This route is for all traffic to the "loopback" network, with the single exception of traffic to the host address of the switch's loopback interface (127.0.0.1/32.) Figure 5: Displaying the currently configured static routes shows the default null route entry in the switch's routing table.

NOTE:

On a single routing switch you can create one null route to a given destination. Multiple null routes to the same destination are not supported.