DELL S50V User Manual

Policy-based Routing | 807

PBR Exceptions (Permit)

Use the command

permit

to create an exception to a redirect list. Exceptions are used when a forwarding

decision should be based on the routing table rather than a routing policy.

FTOS assigns the first available sequence number to a rule configured without a sequence number and
inserts the rule into the PBR CAM region next to the existing entries. Since the order of rules is important,
ensure that you configure any necessary sequence numbers.

Figure 37-6

, the permit statement is never applied because the redirect list covers all source and

destination IP addresses.

Figure 37-6. Ineffective PBR Exception due to Low Sequence Number

To ensure that the permit statement or PBR exception is effective, use a lower sequence number, as shown
in

Figure 37-7

Figure 37-7. Effective PBR Exception due to Proper Sequencing

ip redirect-list rcl0

seq 5 redirect 2.2.2.2 ip any any

seq 10 permit ip host 3.3.3.3 any

ip redirect-list rcl0

seq 10 permit ip host 3.3.3.3 any

seq 15 redirect 2.2.2.2 ip any any