Cisco Nexus 7000 Series Configuration Manual page 46

Information About Classification
Classification Criteria
Differentiated Services Code Point (DSCP)
QoS group
Discard class
ACL
Protocol
Packet length
IP RTP
Class map
You can specify multiple match criteria, you can choose to not match on a particular criterion, or you can
determine the traffic class by matching any or all criteria.
Note
However, if you match on an ACL, no other match criteria, except the packet length, can be specified in a
match-all class. In a match-any class, you can match on ACLs and any other match criteria.
Some match criteria relate only to ingress or egress traffic. For example, the internal label QoS group has no
meaning on ingress traffic because it has not yet been assigned a value.
Traffic that fails to match any class in a QoS policy map is assigned to a default class of traffic called
class-default. The class-default can be referenced in a QoS policy map to select this unmatched traffic.
When you configure match all for a QoS class map by entering the class-map type qos match-all command,
the match-all option does not work. Instead, the match criteria is always treated as match any.
You can reuse class maps within the same virtual device context (VDC) when defining the QoS policies for
different interfaces that process the same types of traffic.
Note For more information on class maps, see "Using Modular QoS CLI".
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide
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Description
DSCP value within the DIffServ field of the IP header.
Locally significant QoS values that can be
manipulated and matched within the system. The
range is from 1 to 126.
Locally significant values that can be matched and
manipulated within the system. The range is from 0
to 63.
IP ACL or MAC ACL name.
Standard Layer 2 protocol such as Address Resolution
Protocol (ARP) or Connectionless Network Service
(CLNS).
Size range of Layer 3 packet lengths.
Identify applications using Real-time Transport
Protocol (RTP) by UDP port number range.
Criteria specified in a named class-map object.
Configuring Classification