Dell N3200-ON Networking N-Series Switches User Guide version 6.8.0 - Page 1486

parallel at once, and the priority of the ACL is used to implement the conceptual match process. There are no counters instantiated for ACLs referred to by a class-map. An ACL that is used in a class-map match term itself has one or more permit and/or deny rules. The incoming packet is matched sequentially against the permit rules in each ACL in the match list, in order, and a match/no match decision is reached. If a permit rule in an ACL in the list matches, the ACL match criteria is met and no further match processing takes place in the classmap. If a deny rule in an access-group in the list matches, the ACL no match criteria is met and no further match processing takes place. ACLs in an access-group referred to in a class map do not have counters enabled. The hit counts will always be zero. If none of the rules in an access-group matches, the packet match is attempted against the next access-group in the class-map match list. Once a match has occurred, if the decision reached in the above step is match, then DiffServ executes the action specified in the set term(s) of the DiffServ policy. If the decision reached in the above step is no match, then DiffServ does not apply any action that is specified in set term(s) in the policy-map statement. The processing logic terminates, and the packet goes through the standard destination-based switching logic. The switch supports either access-group match criteria or regular DiffServ match criteria in a policy map, but not both. If match criteria other than a match access-group are configured in a policy, configuration of access-group match criteria is rejected and vice-versa. Default DiffServ Values Table 43-1 shows the global default values for DiffServ. Table 43-1. DiffServ Global Defaults Parameter DiffServ Classes Policies Default Value Enabled None configured None configured 1486 Differentiated Services