Configuring sFlow Technology for Network Monitoring (CLI Procedure)
You can configure sFlow technology, designed for monitoring high-speed switched or routed networks, to continuously monitor traffic at wire speed on all interfaces simultaneously. Junos OS fully supports the sFlow standard described in RFC 3176, InMon Corporation's sFlow: A Method for Monitoring Traffic in Switched and Routed Networks (see http://faqs.org/rfcs/rfc3176.html).`
To configure sFlow features:
- Configure the IP address of the collector:
- Configure the UDP port of the collector. The default
UDP port assigned is 6343.
[edit protocols sflow]
user@switch# set collector udp-port port-number - Enable sFlow technology on a specific interface:
[edit protocols sflow]
user@switch# set interfaces interface-name
Note: You cannot enable sFlow technology on a Layer 3 VLAN-tagged interface.
You cannot enable sFlow technology on a link aggregation group (LAG), but you can enable it on the member interfaces of a LAG.
- Specify how often the sFlow agent polls the interface:
[edit protocols sflow]
user@switch# set polling-interval secondsNote: Specify 0 if you do not want to poll the interface.
- Specify the rate at which packets must be sampled:
[edit protocols sflow]
user@switch# set sample-rate number - To configure the polling interval and sample rate
at the interface level:
[edit protocols sflow interfaces interface-name]
user@switch# set polling-interval seconds[edit protocols sflow interfaces]
user@switch# set sample-rate numberNote: The interface-level configuration overrides the global configuration.
- To specify an IP address to be used as the agent ID for the sFlow agent:
- To specify the source IP address to be used for sFlow datagrams:
