Configuring an sFlow Collector

Configure an sFlow collector to determine the device to which the sFlow agent sends sFlow datagrams. You can configure up to two collectors for each interface slot in the chassis.

Before you begin

You must globally enable sFlow.

About this task

The sFlow datagrams that the agent sends to the collector are not encrypted. Use a VLAN to create a secure measurement network to route sFlow datagrams.

To further protect the sFlow collector, configure it to accept only sFlow datagrams, or to check sequence numbers and verify source addresses.

Procedure

Enter Global Configuration mode:

enable

configure terminal
Configure the collector information:

sflow collector <1–2> address {A.B.C.D} [Owner WORD <1-20>] [port <1–65535>] [timeout <1–65535>]
Verify the collector configuration:

show sflow collector <1-2>

Example

Configure collector ID, and then verify the configuration.

Switch:1>enable
Switch:1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch:1(config)#sflow collector 1 address 192.0.2.26 owner sflow1 port 6343 timeout 497
Switch:1(config)#sflow collector 2 address 192.0.2.27 owner sflow2 port 6343 timeout 531
Switch:1(config)#show sflow collector

==========================================================================================
                       sFlow Collector Configuration Info

==========================================================================================
Id    Owner                Collector-IP      Port     Timeout(secs)	Reachable via
------------------------------------------------------------------------------------------
1     sflow1               192.0.2.26        6343      497                192.0.2.15
2     sflow2               192.0.2.27        6343      531                192.0.2.16
------------------------------------------------------------------------------------------

All 2 out of 2 Total Num of sflow collector entries displayed

What to do next

After you configure the sFlow collector, configure the packet sampling rate to enable sFlow on a port or ports.

Variable Definitions

Use the data in the following table to use the sflow collector command.


Variable	Value
collector `<1–2>`	Specifies the id to export sFlow datagrams to the collector id. Use the no operator to remove an sflow collector id and a collector name. `no sflow collector <1–2> owner WORD<1–20>` To configure the default value, enter `default sflow collector <1–2>`
address `{A.B.C.D.}`	Specifies the collector IP address. Use the no operator to remove an sflow collector address. `no sflow collector <1–2> address {A.B.C.D}`
owner WORD`<1–20>`	Specifies the sFlow collector name.
port `<1–65535>`	Specifies the destination UDP port. The default port is 6343. To configure the default value, enter `default sflow collector <1–2> port`
timeout `<1–65535>`	Specifies the time remaining (in seconds) before the collector is released. The default timeout is 0, which means the timeout is not used and the collector sends data forever. To configure the default value, enter `default sflow collector <1–2> timeout`