The table of rules and Rules statements applied to all incoming traffic
at the post-routing phase - ie. both the inPort and outPort are
available for classification
When Diffserv is not in effect(ie. IPX, bridging, or IP when the global option
for Diffserv is off), certain table parameters are not available(see
below). The DiffServ option is enabled or disabled by setting
rlDiffservModeEnabled.