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Configuring sFlow
Sampled Flow (sFlow) is a traffic monitoring technology.
As shown in Figure 57, the sF
low system involves an sFlow agent embedded in a device and a remote
sFlow collector. The sFlow agent collects interface counter information and packet information and
encapsulates the sampled information in sFlow packets. When the sFlow packet buffer is full, or the
aging timer (fixed to 1 second) of sFlow packets expires, the sFlow agent sends the sFlow packets in UDP
datagrams to the specified sFlow collector. The sFlow collector analyzes the information and displays the
results.
sFlow provides the following sampling mechanisms:
• Flow sampling—Obtains packet information.
• Counter sampling—Obtains interface counter information.
Figure 57 sFlow system
As a traffic monitoring technology, sFlow has the following advantages:
• Supports traffic monitoring on Gigabit and higher-speed networks.
• Provides good scalability to allow one sFlow collector to monitor multiple sFlow agents.
• Saves money by embedding the sFlow agent in a device, instead of using a dedicated sFlow agent
device.
Protocols and standards
• RFC 3176, InMon Corporation's sFlow: A Method for Monitoring Traffic in Switched and Routed
Networks
• sFlow.org, sFlow Version 5
sFlow configuration task list
Tasks at a
g
lance
(Required.) Configuring the sFlow agent and sFlow collector information
- H3C MSR Series Routers 1
- Preface 3
- Conventions 4
- Obtaining documentation 5
- Technical support 5
- Documentation feedback 5
- We appreciate your comments 6
- Contents 7
- Ping example 14
- Tracert 16
- Prerequisites 17
- Tracert example 17
- System debugging 19
- Configuring NQA 21
- Collaboration 22
- Threshold monitoring 22
- NQA configuration task list 23
- Configuring the NQA server 23
- Enabling the NQA client 24
- Threshold types 37
- Triggered actions 37
- Reaction entry 37
- Configuring the DNS template 42
- Configuring the TCP template 43
- Configuring the FTP template 45
- NQA configuration examples 47
- Configuring NTP 72
- NTP architecture 73
- Association modes 74
- NTP security 76
- NTP for MPLS VPNs 77
- Configuration task list 78
- Enabling the NTP service 78
- Configuration procedure 100
- Network requirements 101
- Configuring SNTP 116
- SNTP configuration example 118
- Configuring SNMP 120
- SNMP operations 121
- Protocol versions 121
- Configuring SNMP logging 125
- Enabling SNMP notifications 126
- Configuration guidelines 127
- Configuration prerequisites 127
- Displaying the SNMP settings 129
- { Specify SNMPv1 130
- SNMPv3 configuration example 131
- Configuring RMON 133
- Alarm group 134
- Private alarm group 134
- Protocols and standards 135
- Configuring NETCONF 142
- NETCONF message format 143
- FIPS compliance 144
- Enabling NETCONF over SOAP 145
- Entering xml view 146
- Exchanging capabilities 146
- Subscription procedure 147
- Verifying the configuration 148
- Locking the configuration 149
- Unlocking the configuration 150
- Saving the configuration 159
- Loading the configuration 160
- Filtering data 161
- Conditional match 162
- CLI operation example 167
- Configuration example 170
- Returning to the CLI 171
- Appendix 172
- Configuring port mirroring 182
- Configuring samplers 188
- Configuring NetStream 190
- Key NetStream technologies 191
- NetStream export formats 194
- NetStream filtering 194
- NetStream sampling 194
- Flow aging methods 198
- Configuring sFlow 208
- Configuring flow sampling 209
- Configuring counter sampling 210
- Verifying the configurations 212
- Overview 213
- Log destinations 214
- Log formats 215
- Saving logs to a log file 220
- Managing security logs 222
- UNIX log host 227
- Configuring EAA 230
- Elements in a monitor policy 231
- EAA environment variables 232
- System-defined variables 233
- Configuring a monitor policy 234
- Suspending monitor policies 237
- Configuration examples 238
- Monitoring kernel threads 241
- ] [ verbose ] 243
- ] [ verbose ] 243
- Task Command 244
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