Collecting Statistics About IPv4 Flexible Flows
Before collecting statistics about IPv4 flexible flows, familiarize yourself with the applicable environment and complete the pre-configuration tasks. This can help you complete the configuration task quickly and accurately.
Usage Scenario
On the network shown in Figure 1, a carrier enables NetStream on the router functioning as an NDE to obtain detailed network application information. The user can use the information to monitor abnormal network traffic, analyze users' operation modes, and plan networks between ASs.
Flexible flow packets provide user-defined templates for users to customize matching and collected fields as required. The user-defined template improves traffic analysis accuracy and reduces network bandwidth occupation, CPU usage, and storage space usage.
Pre-configuration Tasks
Before collecting the statistics about IPv4 flexible flows, configure static routes or enable an IGP to implement network connectivity.
- Specifying a NetStream Service Processing Mode
- After sampling packets, each NetStream-enabled interface board sends sampled packets to the NetStream service processing board for aggregation and output.
- Configuring a Flexible Flow Statistics Template
- When configuring the flexible flow statistics output function, configure a flexible flow statistics template, customize matching and collected fields, and apply the template to an interface.
- Outputting Flexible Flows
- To ensure that flexible flows can be correctly output to the NMS, specify the related parameters for flexible flows.
- (Optional) Configuring NetStream Monitoring Services
- NetStream services can be configured on the NetStream Data Exporter (NDE) to enable carriers to implement more delicate traffic statistics and management over IPv4 flexible flows.
- (Optional) Adjusting the AS Field Mode and Interface Index Type
- Before the NetStream Collector (NSC) can properly receive and parse NetStream packets output by the NetStream Data Exporter (NDE), the AS field modes and interface index types configured on the NDE must be the same as those on the NSC.
- (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.
- Sampling IPv4 Flows
- You can enable NetStream to sample and analyze the incoming or outgoing flows on an interface.
- Verifying the Configuration of IPv4 Flexible Flow Statistics Collection
- After NetStream configurations are complete, you can run the display commands in any view to verify the running status of NetStream functions.