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eSight V300R010C00SPC200, 300, and 500 Operation Guide 09

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iPCA Management Introduction

iPCA Management Introduction

This section describes the definition, functions, application restrictions, and key indicators of iPCA management.


Huawei quality measurement solution is based on Packet Conservation Algorithm for Internet (iPCA) technology developed by Huawei. iPCA implements packet loss monitoring and fault location on a connectionless IP network by coloring real service packets and partitioning the network. It allows a network to perceive service quality and quickly locate faults. In addition, iPCA breaks the limitation of traditional measurement technologies.


Enterprise IP networks carry complicated and diversified services, and network applications closely relate to routine operation of enterprises. Packet Conservation Algorithm for Internet (iPCA) provides device-level, network-level, and service flow packet loss measurement on enterprise campus networks. It marks on real IP service packets transmitted on networks; therefore, network administrators can easily monitor network quality and quickly locate faults without increasing load on the networks.

Device-level Detection (Including Device Detection and Link Detection)

iPCA-capable devices are deployed on the enterprise campus network. iPCA can be performed on these devices and Layer 2 direct links between the devices. eSight provides a network topology to show whether unicast IP packets are lost in this area in real time. If packet loss occurs, eSight can show the device where packets are lost, the packet loss ratio, and the number of lost packets. eSight provides the following iPCA functions:

  1. Displays the latest packet loss measurement result of the devices and links in the topology view.
  2. Reports an alarm when the device or link packet loss measurement result exceeds the preset threshold.

Network-level Detection

The branch networks of an enterprise are connected through a carrier's network. The egress device of each branch functions as a CE to connect to the carrier's network. The enterprise needs to evaluate service quality on the carrier's network. When service quality degrades, the enterprise network administrator needs to check whether the problem is caused by the carrier's network. iPCA network-level monitoring is deployed on the egress devices of the campus network to monitor service quality of the carrier's network.

Packet Loss Measurement for the Unicast IP Service

If the quality of key services in an enterprise degrades, the network administrator needs to determine whether the problem occurs in application servers, terminals, or network devices. If packet loss occurs, the administrator must quickly check where the packets are lost, on a node or a link. The Telepresence service is used as an example here to describe how to measure and locate packet loss on a network.

  1. Configure network-level measurement on the interfaces of two switches that are connected through Telepresence servers and terminals to check whether packet loss occurs. If no packet is lost, the problem occurs on Telepresence terminals.

  2. The administrator needs to check the terminals. If packet loss occurs between the Telepresence server and terminal, check which node or link has lost the packets.

  3. Check the packet loss measurement results of devices on the service forwarding path to quickly locate the faulty node.

Application Restrictions

  • To find the path of a service flow, the eSight must know the source and destination IP addresses of the service flow.
  • Currently, point-to-point detection of service path finding is supported on layer-3 IP networks but not on other networks such as layer-2 network and MPLS VPN.
  • In service path discovery, only the latest path can be discovered through IP TRACERT. The load balancing path or standby path cannot be discovered.
  • After an iPCA task is created, the task cannot be deleted or modified on the device. Otherwise, the eSight task will be abnormal.
    • In a version earlier than V300R007C00, to delete an iPCA task, delete the task in the eSight first, and then delete the TLP from the devices. Strictly follow this sequence. Otherwise, the iPCA tasks on the eSight will be abnormal.
    • In V300R007C00 or a later version, directly delete iPCA tasks from eSight. When an iPCA task is deleted from eSight, all related configuration of this task is automatically deleted. No operations are required on the device.



Updated: 2019-09-12

Document ID: EDOC1100044378

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