HP 7102dl - ProCurve Secure Router Configuration Manual page 903

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Troubleshooting Routing
You can also select a source address for ping so that you can simulate the
traffic for source-based PBR. If the ping is not successful, then you should
look for misconfigurations in the set clauses. Verify that specified interfaces
are up and that the router's routing table includes a route to the next-hop
address.
Simply because a ping is successful does not mean that traffic used the correct
interface.
View the route map by entering show route-map and verify that the pings
have generated "Policy routing matches." (See Figure 15-43.)
If the router is not matching any packets to the entries, then you should verify
that the route map has been applied to the correct interface. Route maps for
PBR apply to traffic received on the interface.
You should also look for misconfigurations in the match clauses. One common
problem is a misconfigured ACL. See Chapter 5: Applying Access Control to
Router Interfaces for tips for troubleshooting an ACL.
Remember also that if you specify more than one type of criteria in an entry,
traffic must match each specification. For example, you enter:
ProCurve(route-map)# match length 150 200
ProCurve(route-map)# match ip precedence 5
This route map entry only selects packets that are both the correct size and
have the correct IP precedence value.
If you are using source-based PBR only, you can use this traceroute command
to determine the path the traffic is taking:
Syntax: traceroute <destination A.B.C.D> source <A.B.C.D>
Another common problem with PBR is traffic that should be routed normally
is being sent over the policy-based route. In this situation, you consider
whether the route map's set commands should use the default keyword so
that it only applies to traffic without another explicit route. Often this is the
case when you are using the route map to route and load balance external
traffic. You should also check the route map's match clauses for misconfigu-
rations. If an entry does not include a match clause, then it will select all traffic.
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