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S3700HI Ethernet Switches
Configuration Guide - QoS
Networking Requirements
The Switch is connected to GE 0/0/2 and the router; the 802.1p priorities of voice, video, and
data services from the Internet are 6, 5, and 2 respectively, and these services can reach users
through the router and Switch, as shown in
side is greater than the rate of the LSW interface; therefore, a jitter may occur in the outbound
direction of GE 0/0/1. To reduce the jitter and ensure the bandwidth of various services, the
requirements are as follows:
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Figure 2-6 Networking diagram for configuring traffic shaping
PC
Configuration Roadmap
The configuration roadmap is as follows:
1.
2.
3.
4.
Data Preparation
To complete the configuration, you need the following data:
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Issue 01 (2012-03-15)
The CIR on the interface is 20000 kbit/s.
The CIR and PIR for the voice service are 3000 kbit/s and 5000 kbit/s respectively.
The CIR and PIR for the video service are 5000 kbit/s and 8000 kbit/s respectively.
The CIR and PIR for the data service are 2000 kbit/s and 3000 kbit/s respectively.
Phone
802.1p=6
802.1p=2
Residence
802.1p=5
TV
Create VLANs and configure each interface so that the residential user can access the
network through the Switch.
Configure interfaces to trust 802.1p priorities of packets.
Configure traffic shaping on an interface to limit the bandwidth of the interface.
Configure traffic shaping in an interface queue to limit the CIRs of voice, video, and data
services.
802.1p priorities
Rate for traffic shaping on an interface
Rate for traffic shaping in each interface queue
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2 Traffic Policing and Traffic Shaping Configuration
Figure
2-6. The rate of the traffic from the network
GE0/0/1
LSW
Switch
GE0/0/2
Core
Network
Router
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