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eSight V300R009C00 Operation Guide 10

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License Support

The network traffic analysis resource management scale is determined by eSight Network Traffic Analysis License (Device). The value for trial use is 1, and a maximum number of 350 NEs can be managed. Each time one more device is managed, the NE count allowed by the license is reduced by one.

Component Dependency

  • The network traffic analysis depends on the NTC and NTA components.
  • In the distributed deployment scenario of the NTC, the NTA needs to be installed on the active eSight server.
  • Network Traffic Analysis > Traffic Monitor > Wireless Network depends on the WLAN service component.

Protocol Support

NetStream, sFlow, or NetFlow need to be configured on the device.

SNMP read parameters need to be set on the device and eSight.

Telnet parameters need to be set for the functions for synchronizing and delivering the sampling ratio.

Device Support

For details, see the Specification List.

Version Support

For details, see the Specification List.

Application Scenario

The NTA applies to trend analysis for top N traffic on the enterprise network. Users can use the NTA to monitor the distribution of top N application traffic volumes and detect abnormal traffic in a timely manner so that users can plan networks based on the long-term network traffic distribution. Therefore, the NTA can implement transparent network management.

Feature Limitation and Dependency

  • Only the professional eSight with the Oracle database supports VXLAN traffic viewing. A maximum of 100 VNIs are supported.
  • The NAT uses the sampling technology and applies only to top N traffic trend analysis because the collected traffic has slight differences from the actual traffic. When there are a large number of sessions on the network, only top N traffic volumes are viewed, and the NAT is not applicable to accurate traffic analysis and traffic-based charging.
  • The traffic analysis function is not recommended when the data center has large traffic.
  • Traffic forensics save information about the original traffic, occupying system resources. Disable this function after the function is used.
  • The NTA supports only the devices in the specification list. For other devices, their traffic can be displayed on eSight if they support NetFlow, NetStream, or sFlow. However, eSight functions may be abnormal, and the traffic may be incorrect.
  • You are advised to use the recommended sampling ratio of devices. If the ratio is too small, the forwarding performance may be affected.
  • Use the command line in Traffic Config > Navigation to configure the NTA. If any configuration is missing or incorrect, the NTA result may be incorrect, and the functions may be abnormal.
  • Configurations of two nodes deployed remotely in a NAT two-node cluster need to be sent to two collectors at the same time.
  • If the collector IP address changes, you need to log in to the device and reset the address of the NetStream, sFlow, or NetFlow. Otherwise, traffic statistics are not reported.
  • Application traffic analysis for WLAN regions is supported only in the centralized forwarding (tunnel mode) networking.
Updated: 2019-09-07

Document ID: EDOC1100011877

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