Installation and Getting Started Guide

Two static routes to 192.168.7.0/24:

--Standard static route through gateway 192.168.6.157, with metric 1

--Null route, with metric 2

Router A

Router B

192.168.6.188/24192.168.6.157/24

When standard static route is good, Router A uses that route.

192.168.7.7/24

192.168.7.69/24

Router A

 

Router B

192.168.6.188/24

192.168.6.157/24

192.168.7.7/24

 

 

X

If standard static route is unavailable, Router A uses

the null route (in effect dropping

instead of forwarding the packets).

192.168.7.69/24

Null

Figure 6.3 Standard and null static routes to the same destination network

Figure 6.4 shows another example of two static routes. In this example, a standard static route and an interface­ based static route are configured for destination network 192.168.6.0/24. The interface-based static route has a lower metric than the standard static route. As a result, the routing switch always prefers the interface-based route when the route is available. However, if the interface-based route becomes unavailable, the routing switch still forwards the traffic toward the destination using an alternate route through gateway 192.168.8.11/24.

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