Product guide

IP Routing Features
Configuring Static IP Routes
Configuring the Default Route
You can also assign the default router as the destination by entering 0.0.0.0
0.0.0.0.
Configuring a “Null” Route
You can configure the routing switch to drop IP packets to a specific network
or host address by configuring a “null” (sometimes called “null0”) static route
for the address. When the routing switch receives a packet destined for the
address, the routing switch drops the packet instead of forwarding it.
To configure a null static route to drop packets destined for network
209.157.22.x, enter the following commands:
ProCurve(config)# ip route 209.157.22.0 255.255.255.0
reject
ProCurve(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.
11-20