IP Routing Features

Configuring Static IP Routes

To configure a null static route to drop packets destined for network 209.157.22.x, enter the following commands:

HPswitch(config)# ip route 209.157.22.0 255.255.255.0 reject

HPswitch(config)# write memory

Syntax: ip route <ip-addr> <ip-mask> reject

or

ip route <ip-addr>/<mask-bits> reject

The <ip-addr> parameter specifies the network or host address. The routing switch will drop packets that contain this address in the destination field instead of forwarding them.

The <ip-mask> parameter specifies the network mask. Ones are significant bits and zeros allow any value. For example, the mask 255.255.255.0 matches on all hosts within the Class C sub-net address specified by <ip-addr>. Alter- natively, you can specify the number of bits in the network mask. For example, you can enter 209.157.22.0/24 instead of 209.157.22.0 255.255.255.0.

The reject parameter indicates that this is a null route. You must specify this parameter to make this a null route.

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