H3C Technologies H3C MSR 5600 - Manual (Page 188)

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Configuring samplers
A sampler samples packets. The sampler selects a packet from among sequential packets, and it sends
the packet to other service modules for processing.
The following sampling modes are available:
• Fixed mode—The first packet is selected from among sequential packets in each sampling.
• Random mode—Any packet might be selected from among sequential packets in each sampling.
A sampler can be used to sample packets for NetStream. Only the sampled packets are sent to and
processed by the NetStream module. Sampling is useful when you have too much traffic and want to limit
the volume of traffic to be analyzed. The sampled data is statistically accurate and sampling decreases
the impact on the forwarding capacity of the device.
For more information about NetStream, see "Configuring NetStream."
Creating a sampler
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a sampler.
sampler sampler-name mode
{ fixed | random }
packet-interval rate
By default, no sampler exists.
Displaying and maintaining a sampler
Execute display commands in any view.
Task Command
Display configuration information about the sampler
(MSR 2600/MSR 3600).
display sampler [ sampler-name ]
Display configuration information about the sampler
(MSR 5600).
display sampler [ sampler-name ] [ slot slot-number ]
Sampler configuration example
Network requirements
As shown in Figure 51 , configure IPv4 NetStream on the device to collect statistics on incoming and
outgoing traffic on Ethernet 1/2. The NetStream data is sent to port 5000 on the NetStream server at
12.110.2.2/16. Do the following: