Configuring A Route Through The Null Interface - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

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IP Routing—Configuring Static Routes

Configuring Static Routes

For example, to configure Router A shown in Figure 11-6, you would enter:

ProCurve(config)# ip route 192.168.10.0 /24 192.168.12.2

ProCurve(config)# ip route 0.0.0.0 /0 ppp 1

192.168.1.0 /24

Figure 11-6. Default Routing

Default routes are used with dynamic routing as well as static routing. For

example, OSPF stub routers in an OSPF network do not receive many of the

OSPF link state advertisements (LSAs). This keeps the protocol's overhead

down and stub router memory uncluttered with routes that are not needed.

Instead, stub routers can receive a default route for all external traffic.

Configuring a Route through the Null Interface

When the router matches a packet to a route through the null interface, it drops

the packet. You can use the null interface to force the router to drop

certain traffic.

To configure a null route, enter this command from the global configuration

mode context:

Syntax: ip route <A.B.C.D> <subnet mask | /prefix length> null 0 [<administrative

You might configure a route through the null interface in order to drop traffic

to network addresses that do not yet exist in your network.

192.168.10.0 /24

192.168.12.2

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