
Configuring and Customizing IP
303528-A Rev 00
4-15
Using a Default Route for an Unknown Subnet
By default, IP drops packets addressed to an unknown subnet and returns an
ICMP to the sender. This prevents local traffic from accidentally following the
default route to the Internet.
In cases where remote sites follow a default route to a central site, it is appropriate
to enable this parameter. If the router serves as an Internet gateway (with a default
route to the Internet), the parameter can be disabled.
The default route must be present in the routing table.
Using Site Manager
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
Global
. The Edit IP Global Parameters window
opens.
4. Set the
Enable Default Route for
Subnets
parameter. Site Manager:
Enable Default Route for Subnets
parameter: page A-44
5. Click on
OK
. Site Manager returns you to the
Configuration Manager window.
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