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S12700 V200R013C00 Configuration Guide - QoS

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, ACL-based simplified traffic policy, and HQoS.
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Application Scenarios for Traffic Statistics

Application Scenarios for Traffic Statistics

Networking Requirements

Traffic statistics are mainly used to locate network faults and narrow the search scope.

As shown in Figure 8-1, if the PC slowly accesses the server or ping packets are lost, a fault occurs on the network. You can use the traffic statistics function to locate the failure point.

Figure 8-1  Networking of traffic statistics

Service Deployment

  • On SwitchA, configure traffic statistics in the inbound direction of GE1/0/1 and outbound direction of GE1/0/2.

  • Configure traffic statistics in the outbound direction of GE1/0/2 on SwitchA, and configure traffic statistics in the inbound direction of GE1/0/2 on SwitchB.

If the numbers of packets in inbound and outbound directions of SwitchA are the same, SwitchA works properly. If the number of packets in the outbound direction is less than the number of packets in the inbound direction, packets are lost on SwitchA and the failure point is SwitchA. The method used to check whether SwitchB fails is similar.

If the number of packets in the inbound direction of GE1/0/2 on SwitchB is less than the number of packets in the outbound direction of GE1/0/2 on SwitchA, the link between SwitchA and SwitchB fails.

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Updated: 2019-04-08

Document ID: EDOC1100065653

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