- Table of Contents
-
- 08-ACL and QoS Configuration Examples
- 01-H3C_ACL_Configuration_Examples
- 02-H3C_Control_Plane-Based_QoS_Policy_Configuration_Examples
- 03-H3C_Traffic_Filtering_Configuration_Examples
- 04-H3C_Traffic_Policing_Configuration_Examples
- 05-H3C_GTS_and_Rate_Limiting_Configuration_Examples
- 06-H3C_Congestion_Avoidance_and_Queue_Scheduling_Configuration_Examples
- 07-H3C_Priority_and_Queue_Scheduling_Configuration_Examples
- Related Documents
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Title | Size | Download |
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02-H3C_Control_Plane-Based_QoS_Policy_Configuration_Examples | 51.72 KB |
H3C Control Plane-Based QoS Policy Configuration Examples
Introduction
This chapter provides examples for configuring control plane-based QoS policies.
Prerequisites
The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.
This document assumes that you have basic knowledge of QoS policies.
Example: Rate limiting ICMP packets
Network configuration
As shown in Figure 1, the device receives a large number of ICMP packets from the Internet. As a result, CPU usage is high, and device performance degrades.
Configure a control plane-based QoS policy to meet the following requirements:
· Rate limit ICMP packets sent to the control plane to 320 kbps.
· Drop excess ICMP packets.
Analysis
To meet the network requirements, you must perform the following tasks:
· Use the if-match command to classify ICMP packets into a class.
· Use the car command to configure the rate limit value for ICMP packets and drop excess packets.
Software versions used
This configuration example was created and verified on S7500E-CMW710-R7536P05.
Restrictions and guidelines
When you configure a control plane-based QoS policy to rate limit ICMP packets, follow these restrictions and guidelines:
· By default, the predefined QoS policy is applied to the control plane. The predefined QoS policy identifies packet types by system index and uses a default rate limit value for each packet type. To display the predefined QoS policy, use the display qos policy control-plane pre-defined command.
· You can use the if-match control-plane protocol or if-match control-plane protocol-group command to classify protocol packets.
· You can only configure the car command or a combination of the car and accounting packet commands in the behavior associated with the class. Only the CIR value in the car command takes effect.
Procedures
# Create a class named ICMP, and use the ICMP protocol as the match criterion.
<Device> system-view
[Device] traffic classifier ICMP
[Device-classifier-ICMP] if-match control-plane protocol icmp
[Device-classifier-ICMP] quit
# Create a behavior named ICMP, and configure a CAR action for ICMP packets.
[Device] traffic behavior ICMP
[Device-behavior-ICMP] car cir 320
[Device-behavior-ICMP] quit
# Create a QoS policy named ICMP, and associate the class ICMP with the behavior ICMP in the QoS policy.
[Device] qos policy ICMP
[Device-qospolicy-ICMP] classifier ICMP behavior ICMP
[Device-qospolicy-ICMP] quit
# Apply the QoS policy ICMP to the inbound direction of the control plane of the card in slot 1.
[Device] control-plane slot 1
[Device-cp-slot1] qos apply policy ICMP inbound
[Device-cp-slot1] quit
Verify the configuration
# Verify that the QoS policy is correctly applied to the control plane.
[Device] display qos policy control-plane slot 1
Control plane slot 1
Direction: Inbound
Policy: ICMP
Classifier: ICMP
Operator: AND
Rule(s) :
If-match control-plane protocol icmp
Behavior: ICMP
Committed Access Rate:
CIR 320 (kbps), CBS 20480 (Bytes), EBS 0 (Bytes)
Green action : pass
Yellow action : pass
Red action : discard
Green packets : 0 (Packets)
Red packets : 0 (Packets)
Configuration files
#
traffic classifier ICMP operator and
if-match control-plane protocol icmp
#
traffic behavior ICMP
car cir 320 cbs 20480 ebs 0 green pass red discard yellow pass
#
qos policy ICMP
classifier ICMP behavior ICMP
#
control-plane slot 1
qos apply policy ICMP inbound
Related documentation
· H3C S7500E Switch Series ACL and QoS Configuration Guide-R7536P05
· H3C S7500E Switch Series ACL and QoS Command Reference-R7536P05