Here's a general guideline to configure sFlow on a supported Cisco Catalyst switch, such as the Catalyst 2960L and Catalyst 1000:
Connect to your Cisco Catalyst switch via SSH or a console cable. If connecting via SSH, use a tool like PuTTY or the built-in SSH client in your terminal, and enter the switch's IP address, username, and password to log in.
Once logged in, enter global configuration mode by typing the following command:
To configure sFlow settings, including the IP address and port of the remote flow collector, use the following commands:
Replace ID with the ID of this collector definition, x.x.x.x with the IP address of your sFlow collector, yyyy with the desired port number for the sFlow collector (e.g., 6343), and zzzz with the maximum size, in bytes, of the UDP datagram containing sFlow records that is allowed to be sent (e.g., 1280 for 1280 bytes).
To set the sFlow agent IP address, use the following command:
Replace x.x.x.x with the IP address to be used as the sFlow agent IP address.
To enable sFlow on the desired interfaces, use the following commands:
Replace INTERFACE_NAME with the name of the interface for which you want to enable sFlow (e.g., GigabitEthernet1/0/1). Replace DIRECTION with the direction of traffic, input or output, that is to be sampled, ID with the ID of the collector definition to which the sFlow records are to be sent, yyyy with the sampling rate (e.g., 1024 for 1 in 1024 packets), and zzzz with the number of bytes to included from the sampled IP packet.
This step should be repeated for all interfaces for which sFlow sampling is desired.
To save your configuration changes, exit global configuration mode and use the following command:
To verify that sFlow is configured correctly, use the following command:
This command should display the sFlow settings you just configured. For example:
Please note that these instructions may not apply to all Cisco Catalyst switches, as sFlow support varies between models. Ensure that your specific switch model supports sFlow before attempting to configure it.