Information About Classification
Classification is the separation of packets into traffic classes. You configure the device to take a specific action on the specified classified traffic, such as policing or marking down, or other actions.
You can create class maps to represent each traffic class by matching packet characteristics with classification criteria.
Classification Criteria |
Description |
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Class map |
Criteria specified in a named class-map object. |
Precedence |
Precedence value within the Type of Service (ToS) byte of the IP Header. |
Differentiated Services Code Point (DSCP) |
DSCP value within the DIffServ field of the IP Header. |
Protocol |
Selected set of protocols, including Address Resolution Protocol (ARP) and Connectionless Network Service (CLNS). |
IP RTP |
Identify applications using Real-time Transport Protocol (RTP) by UDP port number range. |
ACL |
Traffic is classified by the criteria defined in the access control list (ACL). |
RFC | Title |
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RFC 2474 | Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers |