3Com Switch 7750 Configuration Guide Guide

372 CHAPTER 37: IP ROUTING POLICY CONFIGURATION
does not pass the filtering of the route-policy. Therefore, when all the nodes in the
route-policy are in the deny mode, no routing information will pass the filtering of
the route-policy.
At least one item in an ip-prefix list should be in permit mode. The items in deny
mode can be defined first to rapidly filter out the routing information not meeting
the condition. However, if all the items are in the deny mode, no route will pass
the ip-prefix filtering. You can define the item "permit 0.0.0.0 0 less-equal 32"
after multiple items in the deny mode for all other routes to pass the filtering (if
less-equal 32 is not specified, only the default route will be matched).