Definition of QoS


Quality of Service (QoS) is the ability to ensure network transmission performance, for example, bandwidth. In hardware SDN, the system provides the QoS management. Users can create QoS profiles to limit the bandwidth of ECS NICs. By default, no QoS profiles are bound to the primary NIC of an ECS. Therefore, the bandwidth of the primary NIC is not limited. You can modify QoS configurations to limit the NIC bandwidth of an ECS.

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Counters for evaluating the QoS performance
The QoS performance is evaluated using the following counters: 1. Bandwidth: bearer rate that the network must provide for a specific traffic class 2. Latency: an average time taken by service data to travel across a network (namely, the time interval between transmitting a data packet and receiving the data packet) 3. Jitter: variations in delay 4. Packet loss rate: percentage of lost packets

QoS configuration on an S series switch
For the QoS configuration on an S series switch (excluding the S1700), see "QoS Configuration Guide". You can get the document from Huawei Enterprise Product&Service Support by clicking Support > Enterprise Network > Switch > Campus Switch.

How to configure traffic shaping on an AR
For example,Users in the enterprise are located on two network segments and access the server on through Router. The rate of packets from enterprise devices on to the server needs to be limited to 64 kbit/s. The configuration are as follows: # vlan batch 10 20 # acl number 3001 //Configure ACL 3001. rule 5 permit ip source //Configure rule 5 to allow packets on to pass through. rule 10 permit ip source //Configure rule 10 to allow packets on to pass through. acl number 3002 //Configure ACL 3002. rule 5 permit ip source //Configure rule 5 to allow packets on to pass through. # qos queue-profile limit //Create a queue profile named limit. queue 3 gts cir 64 cbs 1600 //Set the CIR of queue 3 to 64 kbit/s. # traffic classifier c1 operator or if-match acl 3002 //Configure a traffic classifier named c1 to match ACL 3002. # traffic behavior b1 remark local-precedence af3 //Configure traffic behavior b1: Re-mark packets matching the traffic classifier with AF3. When permit or deny is not specified, the permit action is taken by default. # traffic policy p1 classifier c1 behavior b1 //Configure a traffic policy named p1, and bind traffic classifier c1 to traffic behavior b1 in the traffic policy. # interface Vlanif10 ip address # interface Vlanif20 ip address # interface Ethernet2/0/0 port link-type trunk //Configure the link type of the interface as trunk. port trunk allow-pass vlan 10 20 //Add the interface to VLAN 10 and VLAN 20. traffic-policy p1 inbound //Apply the traffic policy p1 to the inbound direction on the interface. # interface GigabitEthernet3/0/0 ip address qos queue-profile limit //Apply the queue profile limit to the interface. nat outbound 3001 //Perform NAT for packets matching ACL 3001. # ip route-static #

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