H3C S3100-52P Operation Manual
Qos
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Operation Manual - QoS
H3C S3100-52P Ethernet Switch
Chapter 1 QoS Configuration....................................................................................................... 1-1
1.1 Overview ............................................................................................................................ 1-1
1.1.1 Traffic ...................................................................................................................... 1-1
1.1.2 Traffic Classification ................................................................................................ 1-1
1.1.3 Precedence ............................................................................................................. 1-1
1.1.4 Priority of Protocol Packets ..................................................................................... 1-5
1.1.5 Port Rate Limit......................................................................................................... 1-5
1.1.6 Queue Scheduling Configuration Synchronization on Aggregated Ports ............... 1-5
1.1.7 Queue Scheduling................................................................................................... 1-6
1.2 QoS Supported by S3100-52P .......................................................................................... 1-7
1.3 Configuring the Mapping between 802.1p Priority and Queues........................................ 1-8
1.4 Setting to Use the Port Priority or Packet Priority.............................................................. 1-9
1.5 Setting the Precedence of Protocol Packet ..................................................................... 1-10
1.5.1 Configuration Prerequisites................................................................................... 1-10
1.5.2 Configuration Procedure ....................................................................................... 1-10
1.5.3 Configuration Example.......................................................................................... 1-11
1.6 Configuring Port Rate Limit.............................................................................................. 1-11
1.6.1 Configuration Prerequisites................................................................................... 1-11
1.6.2 Configuration Procedure ....................................................................................... 1-11
1.6.3 Configuration Example.......................................................................................... 1-12
1.7 Configuring Queue-Scheduling........................................................................................ 1-12
1.7.1 Configuration Prerequisites................................................................................... 1-12
1.7.2 Configuration Procedure ....................................................................................... 1-13
1.7.3 Configuration Example.......................................................................................... 1-14
1.8 Displaying QOS Configuration......................................................................................... 1-15
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Summary of Contents for H3C S3100-52P
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Page 1: Table Of Contents
1.1.6 Queue Scheduling Configuration Synchronization on Aggregated Ports ....1-5 1.1.7 Queue Scheduling....................1-6 1.2 QoS Supported by S3100-52P ..................1-7 1.3 Configuring the Mapping between 802.1p Priority and Queues........1-8 1.4 Setting to Use the Port Priority or Packet Priority.............. 1-9 1.5 Setting the Precedence of Protocol Packet .............. -
Page 2: Chapter 1 Qos Configuration
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration Chapter 1 QoS Configuration 1.1 Overview QoS (Quality of Service) is a concept generally existing in occasions with service supply and demand. It evaluates the ability to meet the need of the customers in service. - Page 3 Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration Figure 1-1 DS field and TOS byte The TOS field in an IP header contains eight bits: The first three bits indicate IP precedence in the range of 0 to 7.
- Page 4 Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration service level can be segmented. The QoS rank of the AF class is lower than that of the EF class; Class selector (CS) class: This class comes from the IP TOS field and includes eight classes;...
- Page 5 Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration Figure 1-2 An Ethernet frame with an 802.1Q tag header As shown in the figure above, each host supporting 802.1Q protocol adds a 4-byte 802.1Q tag header after the source address of the former Ethernet frame header when sending packets.
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Page 6: Priority Of Protocol Packets
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration 1.1.4 Priority of Protocol Packets Protocol packets carry their own priority. You can perform QoS actions on protocol packets by setting their priorities. 1.1.5 Port Rate Limit Port rate limit is port-based rate limit. It limits the total rate of outbound packets on a port. -
Page 7: Queue Scheduling
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration 1.1.7 Queue Scheduling When the network is congested, the problem that many packets compete for resources must be solved, usually through queue scheduling. In the following section, strict priority (SP) queueing and weighted round robin (WRR) queueing are introduced. -
Page 8: Qos Supported By S3100-52P
In this way, the bandwidth resources are made full use. 1.2 QoS Supported by S3100-52P Table 1-4 QoS functions supported by S3100-52P and related commands Specification Related command... -
Page 9: Configuring The Mapping Between 802.1P Priority And Queues
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration Specification Related command Set the priority of Supported protocol-priority protocol packets Set port rate limit Supported line-rate 1.3 Configuring the Mapping between 802.1p Priority and Queues The mapping between the local precedence and the outbound queue is one-to-one. -
Page 10: Setting To Use The Port Priority Or Packet Priority
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration System View: return to User View with Ctrl+Z. [H3C] qos cos-local-precedence-map 2 3 4 1 7 0 5 6 [H3C] dis qos cos-local-precedence-map cos-local-precedence-map: cos(802.1p) : -------------------------------------------------------------------------- local precedence(queue) : 1.4 Setting to Use the Port Priority or Packet Priority... -
Page 11: Setting The Precedence Of Protocol Packet
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration III. Configuration example Set to use the port priority and specify the priority of Ethernet1/0/1 to 7. Configuration procedure: <H3C> system-view System View: return to User View with Ctrl+Z. -
Page 12: Configuration Example
Set the IP precedence of ICMP protocol packets to 3. Display the configuration results. Configuration procedure: <H3C> system-view System View: return to User View with Ctrl+Z. [H3C] protocol-priority protocol-type icmp ip-precedence 3 [H3C] display protocol-priority Protocol: icmp IP-Precedence: flash(3) 1.6 Configuring Port Rate Limit 1.6.1 Configuration Prerequisites... -
Page 13: Configuration Example
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration Operation Command Description Required target-rate: Total rate to limit packet sending and receiving on the port, in Kbps. The granularity of rate limit is 64 Kbps. If the number you input is... -
Page 14: Configuration Procedure
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration 1.7.2 Configuration Procedure Table 1-10 Configure queue scheduling in system view Operation Command Description Enter system view system-view — Required queue-scheduler In WRR mode, if the weight strict-priority... -
Page 15: Configuration Example
Query the configuration information. Configuration procedure: <H3C> system-view System View: return to User View with Ctrl+Z. [H3C] queue-scheduler wrr 2 2 3 3 4 4 5 5 [H3C]display queue-scheduler Queue scheduling mode: weighted round robin weight of queue 0: 2... -
Page 16: Displaying Qos Configuration
Operation Manual – QoS H3C S3100-52P Ethernet Switch Chapter 1 QoS Configuration weight of queue 1: 2 weight of queue 2: 3 weight of queue 3: 4 weight of queue 4: 5 weight of queue 5: 9 weight of queue 6: 13 weight of queue 7: 15 1.8 Displaying QOS Configuration...
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