Qos Packet Marking - Cisco 10000 Series Configuration Manual

QoS Packet Marking

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QoS Packet Marking
QoS packet marking is a QoS tool used to differentiate packets based on designated markings. Using
marking, you can partition your network into multiple priority levels or classes of service. Marking
simplifies the network Qos design and QoS tools configuration, and reduces the overhead of packet
classification by other QoS tools.
You can configure QoS packet marking on a main interface, subinterface, or an individual virtual
circuit (VC). Traffic marking involves setting bits inside frame, packet, or cell header fields that are
specifically designed for QoS marking. Other devices can examine the marked bits and classify traffic
based on the marked values.
Table 7-1
the Cisco 10000 series router's behavior; internal marks are not passed on to other routers.
Table 7-1
Action
atm-clp
cos
discard-class
dscp
mpls experimental
imposition
ip precedence
qos-group
Cisco 10000 Series Router Quality of Service Configuration Guide
7-2
Verifying Traffic Marking, page 7-37
Related Documentation, page 7-39
summarizes the mechanisms you can use to mark packets. The internal mechanisms affect only
Traffic Marking Actions
Description
Sets the ATM cell loss priority
(CLP) bit to 1.
Sets the IEEE 802.1Q class of
service bits in the user priority
field.
Marks a packet with the
discard-class value that you
specify, which indicates the
drop eligibility of a packet.
Marks a packet with the
differentiated services code
point (DSCP) you specify.
Sets the value of the MPLS
experimental (EXP) field on
all imposed label entries.
Marks a packet with the IP
precedence level you specify.
Marks a packet with the QoS
group identifier you specify.
Chapter 7
Layer Section Reference
2 ATM Cell Loss Priority
Marking, page 7-14
2 Class of Service Marking,
page 7-10
Internal Discard-Class Marking,
page 7-16
3 IP Differentiated Services
Code Point Marking,
page 7-6
2 MPLS Experimental
Marking, page 7-14
3 IP Precedence Marking,
page 7-4
Internal QoS Group Marking,
page 7-13
Marking Traffic
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