Huawei Quidway S3500 Series Operation Manual page 262

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
The if-match mode of at least one node of the Route-policy should be the permit
mode. When a Route-policy is used for the routing information filtering, if a piece of
routing information does not pass the filtering of any node, then it means that the
route information does not pass the filtering of the Route-policy. When all the
nodes of the Route-policy are in the deny mode, then all the routing information
cannot pass the filtering of the Route-policy.
The if-match mode of at least one list item of the ip-prefix should be the permit mode.
The list items of the deny mode can be firstly defined to rapidly filter the routing
information not satisfying the requirement, but if all the items are in the deny mode, any
routes will not pass the ip-prefix filtering. You can define an item of permit 0.0.0.0/0
less-equal 32 after the multiple list items in the deny mode so as to let all the other
routes pass the filtering (If less-equal 32 is not specified, only the default route will be
matched).
Huawei Technologies Proprietary
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Chapter 6 IP Routing Policy Configuration