Configuring Priority Mapping Based On Simple Traffic Classification; Establishing The Configuration Task - Huawei Quidway S7700 Configuration Manual - Qos

Quidway S7700 Smart Routing Switch
Configuration Guide - QoS
The S7700 can dynamically add, modify, and delete the actions in traffic behaviors.
Traffic Policy
A traffic policy is a QoS policy configured by binding traffic classifiers to traffic behaviors. You
can associate a traffic classifier with a traffic behavior in a traffic policy.
You can dynamically add, modify, or delete the traffic classifier and traffic behavior in a traffic
policy.
1.3 Configuring Priority Mapping Based on Simple Traffic
Classification
After priority mapping based on simple traffic classification is configured, the device maps
priorities of packets to PHBs and colors to provide differentiated services.

1.3.1 Establishing the Configuration Task

Before configuring priority mapping based on simple traffic classification, familiarize yourself
with the applicable environment, complete the pre-configuration tasks, and obtain the required
data. This helps you complete the configuration task quickly and accurately.
Applicable Environment
When packets come from an upstream device, you can classify them according to the precedence
fields in the packets, such as the 802.1p priority or DSCP priority. In a DiffServ domain, you
need to define the mapping from priorities of packets to PHBs and colors to classify packets.
After the DiffServ domain is bound to an incoming interface, the QoS mechanism performs
congestion management and congestion avoidance according to PHBs and colors of packets on
an outgoing interface.
When packets are sent to a downstream device, you can classify them according to PHBs and
colors of the packets. In a DiffServ domain, you need to define the mapping from PHBs and
colors of packets to priorities to classify packets. After the DiffServ domain is bound to an
outgoing interface, a downstream device provides QoS services according to priorities of
packets.
Pre-configuration Tasks
Before configuring priority mapping based on simple traffic classification, complete the
following task:
l
Issue 01 (2011-07-15)
On a stable network where MAC addresses of packets seldom change, disabling MAC
address learning can reduce the size of the MAC address table and improve device
performance. Unauthorized users may change MAC addresses frequently to attack a
network. To prevent MAC address overflow and protect the network from such attacks,
disable MAC address learning.
Adding an interface that packets pass to a specified VLAN
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1 Class-based QoS Configuration
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