Policy Framework Configuration Guide - Juniper Networks

Chapter 4: Routing Policy Configuration
dsc {
unit 0 {
family inet {
filter {
input filter-name;
output filter-name;
}
}
}
}
You can include this statement at the following hierarchy levels:
• [edit interfaces interface-name]
• [edit logical-systems logical-system-name interfaces interface-name]
The dsc interface name denotes the discard interface. The discard interface supports
only unit 0. For more information about configuring interfaces, see the Junos OS Network
Interfaces Configuration Guide.
The following two configurations are required to configure a policy to forward all packets
to the discard interface.
Configure an input policy to associate a community with the discard interface:
[edit]
policy-options {
community community-name members [ community-id ];
policy-statement statement-name {
term term-name {
from community community-name;
then {
next-hop address; # Remote end of the point-to-point interface
accept;
}
}
}
}
Configure an output policy to set up the community on the routes injected into the network:
Testing Routing Policies
[edit]
policy-options {
policy-statement statement-name {
term term-name {
from prefix-list name;
then community (set | add | delete) community-name;
}
}
}
Before applying a routing policy, you can issue the test policy command to ensure that
the policy produces the results that you expect:
Copyright © 2010, Juniper Networks, Inc.
71