(Optional) Configuring NetStream Interface Option Packets and Setting Option Template Refreshing Parameters

This section describes how to configure NetStream interface option packets and set option template refreshing parameters.

Context

Regardless of the flow format in which the traffic statistics are output, option packet data is exported to the NetStream Collector (NSC) as a supplement. In this way, the NetStream Data Exporter (NDE) can obtain information, such as the sampling ratio and whether the sampling function is enabled, to reflect the actual network traffic.

At present, the following option packets are supported on IPv4 networks:

Interface option packets: These packets are used to send the NetStream configurations of all the boards on the NDE to the NSC in a scheduled manner. The configurations cover the interface index, statistics collection direction, and sampling value in the inbound/outbound direction.
Time application label (TAL) option packets: These packets are used to send application label data to the NSC. The application label option function provides data, such as the application type of system labels, for users to collect L3VPN NetStream statistics. For details, see Collecting Statistics About BGP/MPLS VPN Flows.

Option packets, which are independent of statistics packets, are exported to the NSC in V9 or IPFIX format. Therefore, the required option template is sent to the NMS for parsing option packets. You can set option template refreshing parameters as needed to regularly refresh the template to notify the NSC of the latest option template format.

Procedure

Run system-view
The system view is displayed
Run the following commands as required to configure functions related to interface option packets.
- Run the ip netstream export template option sampler command to enable the function of exporting statistics about interface option packets.
- Run the ip netstream export template option { refresh-rate packet-number | timeout-rate timeout-interval } command to set the packet sending interval and timeout interval for option template refreshing.
  The packet sending interval and timeout interval are set for option template refreshing. An option template can be refreshed at a fixed packet sending interval or timeout interval. The two intervals can both take effect. In the command:
  - refresh-rate packet-interval indicates that the option template is refreshed at a fixed packet sending interval.
  - timeout-rate timeout-interval indicates that the option template is refreshed at a fixed timeout interval.
- Run the ip netstream export option sampler timeout-rate tmval command to set the interval for refreshing option packets.