Traffic Behavior; Traffic Policy - Huawei Quidway S9300 Configuration Manual

1 Class-based QoS Configuration

Traffic Behavior

Performing complex traffic classification is to provide differentiated services. Traffic
classification takes effect only when it is associated with traffic control or resource allocation
actions.
The S9300 supports the combinations of the following traffic actions:
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Traffic Policy

A traffic policy is a QoS policy in which traffic classifiers are bound to traffic behaviors. You
can bind a specified traffic classifier to a traffic behavior through the traffic policy to perform
QoS in a better way.
1-4
Deny/Permit
This traffic control action is the simplest. The S9300 controls network traffic by forwarding
or discarding packets.
Re-marking
This traffic control action is used to set the precedence field in a packet. Packets carry
different precedence fields on various networks. For example, packets carry the 802.1p
field in a VLAN network, the DSCP field on an IP network, and the EXP field on an MPLS
network. Therefore, the S9300 is required to mark the precedence fields of packets
according to the network type.
Generally, a device at the border of a network needs to mark the precedence fields of
incoming packets; the device in the core of a network provides corresponding QoS services
according to the precedence fields marked by the border device, or re-marks the precedence
fields according to its own standard.
Redirection
This traffic control action indicates that the S9300 does not forward packets according to
the destination address but redirects them to the CPU of the LPU, the specified interface,
the specified next hop address, or the Label Switching Path (LSP). The S9300 can specify
up to four next hops.
By using redirection, you can implement policy-based routing (PBR). The PBR is static.
When the next hops are all unavailable, the S9300 forwards the packets to the original
destination.
The S9300 can redirect only incoming packets.
Traffic policing
It is a traffic control action used to limit traffic and resources by monitoring the specification
of the traffic. Through traffic policing, the S9300 can discard, and re-mark the colors and
CoS of packets that exceed the specification.
Here, traffic policing based on a traffic behavior is implemented. For details on traffic
policing, see 2 Traffic Policing and Traffic Shaping
Flow mirroring
Flow mirroring is used to copy the specified data packets to a specified destination to detect
and troubleshoot faults on a network.
For details about flow mirroring, see "Mirroring Configuration" in the Quidway S9300
Terabit Routing Switch Configuration Guide - Device Management.
Traffic statistics
Traffic statistics are used to collect data packets of specified service flows, that is, data
packets matching complex traffic classification rules on the S9300.
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Copyright © Huawei Technologies Co., Ltd.
Quidway S9300 Terabit Routing Switch
Configuration Guide - QoS
Configuration.
Issue 03 (2009-08-20)