Cisco ACE-4710-K9 Administration Guide - Page 119

Chapter 4 Configuring Class Maps and Policy Maps Class Map and Policy Map Overview Class Maps The class-map command defines each Layer 3 and Layer 4 traffic class and each Layer 7 protocol class. You create class maps to classify the traffic received and transmitted by the ACE. • Layer 3 and Layer 4 traffic classes contain match criteria that identify the IP network traffic that can pass through the ACE or network management traffic that can be received by the ACE. • Layer 7 protocol-specific classes identify server load balancing based on HTTP traffic, deep inspection of HTTP traffic, or the inspection of FTP commands by the ACE. A traffic class contains the following components: • Class map name • One or more match commands that define the match criteria for the class map • Instructions on how the ACE evaluates match commands when you specify more than one match command in a traffic class (match-any, match-all) The ACE supports a system-wide maximum of 8192 class maps. The individual match commands specify the criteria for classifying Layer 3 and Layer 4 network traffic as well as the Layer 7 HTTP server load balancing and application protocol-specific fields. The ACE evaluates the packets to determine whether they match the specified criteria. If a statement matches, the ACE considers that packet to be a member of the class and forwards the packet according to the specifications set in the traffic policy. Packets that fail to meet any of the matching criteria are classified as members of the default traffic class if one is specified. OL-11157-01 Cisco 4700 Series Application Control Engine Appliance Administration Guide 4-5