Discussion

aviva@router1# set term 1 then next term
aviva@router1# set term 2 from protocol static
aviva@router1# set term 2 then local-preference 300
aviva@router1# set term 2 then community set 65500:10300
aviva@router1# set term 2 then next term
aviva@router1# set final-term then reject
Once again, explicitly configuring this action is optional because it is the default
when a match occurs and you haven’t specified an accept, reject, or next term
action.
9.7 Making Sure a Routing Policy Is Functioning
Properly
Problem
You want to ensure that a configured policy is working as intended by logging its
actions.
Solution
There are two steps to setting up tracing to see how a configured routing policy is
being applied to routes. First, include a trace action in the policy’s then clause:
[edit policy-options policy-statement outbound-policy term 1]
aviva@Router3# set then trace
Then, set up a tracing file for capturing the output:
[edit routing-options]
aviva@Router3# set traceoptions file policy-trace-log size 10m files 10
aviva@Router3# set traceoptions flag policy
Discussion
When checking whether a routing policy is working, the first and easiest step is to
check the entries in the routing table. Use the show route command on the local
router to verify the effects of an imported routing policy and use the command on
the neighboring router to check the effect of an export policy (see Recipe 8.1). This
command shows the real-time effect of the configured routing policies. If, in examining
the routing tables, you find routes you don’t expect or that routes are missing,
use the JUNOS tracing function to keep a log of which routes a policy has analyzed
and taken action on. This is a common way to debug problems that appear to be
caused by a routing policy not being applied or not being applied properly.
This recipe shows how to set up policy tracing. The set then trace command adds a
tracing action to the policy. This command is part of a larger policy that is being
300 | Chapter 9: Routing Policy and Firewall Filters
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