sFlow Configuration

This section provides the configurations required to assign multiple sFlow collectors to OcNOS.

Topology

The following topology illustrates the sFlow multiple collectors connected with one sFlow Packet Data Unit (PDU):

Figure 48. sFlow with Multiple Collectors

Perform the following configurations:

  1. Configure sFlow using the configuration provided in Configure sFlow for Single Collector section for single collector.
  2. In the interface mode, enable sFlow for a particular interface and specify the collector-id for multiple collectors:
Copy 
(config-if)#interface xe12
(config-if)#sflow direction ingress
(config-if-sflow)#sampling-rate 1024
(config-if-sflow)#max-header-size 256
(config-if-sflow)#exit
(config-if)#sflow direction egress
(config-if-sflow)#sampling-rate 2000
(config-if-sflow)#max-header-size 16
(config-if-sflow)#exit
OcNOS(config-if)#sflow enable
OcNOS(config-if)#sflow poll-interval 10
OcNOS(config-if)#sflow collector-id 3

Show Running Configurations

The following show output display the sample sflow configuration details.

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OcNOS#show running-config sflow feature sflow
!        
sflow agent-ip 1.2.7.10
sflow     collector-id     3     collector     1.2.3.24     port     6345     receiver-time-out     5     max-datagram-size     1560
sflow     collector-id     4     collector     1.2.4.24 port     6346     receiver-time-out     4     max-datagram-size     1570 vrf default
!
interface xe12
sflow direction ingress
 sampling-rate 1024
 max-header-size 256
 exit
sflow direction egress
 sampling-rate 2000
 max-header-size 16
exit
sflow poll-interval 10
sflow collector-id 3
!

interface xe13
sflow direction ingress
 sampling-rate 2500
 max-header-size 100
 exit
sflow direction egress
 sampling-rate 2000
 max-header-size 16
exit
sflow poll-interval 5
sflow collector-id 4
!

Validation

The following show output displays the sFlow details:

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OcNOS#show sflow detail 
sFlow Feature: Enabled
sFlow Version: 5
Agent IP     : 1.2.7.10
Collector 3:
   IP: 1.2.3.24      Port:  6345
   VRF                         :
   Maximum Datagram Size(bytes): 1560
   Receiver timeout(sec)       : 0
Collector 4:
   IP: 1.2.4.24      Port:  6346
   VRF                         :
   Maximum Datagram Size(bytes): 1570
   Receiver timeout(sec)       : 0
 
sFlow Port Detailed Information:
 
Interface  Collector  Packet-Sampling           Packet-Sampling            Counter-Polling         Maximum Header
 
ID                Rate                    Count               Interval       Count        Size(bytes)
 
Ingress      Egress       Ingress      Egress       (sec)                    Ingress     Egress
 
---------  ---------  -----------------------   -----------------------  -----------------------   --------------------
 
Xe12               3        1024         2000            3            6          10            0     256           16
 
Xe13               4        2500         2000            4            7           5            3     100           16 

sFlow Multiple Collector Commands

The sFlow feature introduces a new parameter collector-id.

For additional information about the revised sflow collector command, refer to the sFlow Commands section.

sFlow Multiple Collector Commands with user defined VRFs.

sFlow Multiple Collector Commands with User Defined VRFs

The sFlow feature introduces a new parameter collector-id.

  • Users can sample packets on an interface mapped to a user-defined VRF and send sFlow packets through the same VRF.

  • Users can send sampled packets to multiple destinations (collectors) through different VRFs simultaneously.

The following sample configuration demonstrates sFlow using multiple collector-ids with user-defined VRFs:

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feature sflow

sflow collector-id 3 collector 172.20.1.1 port 6343 receiver-time-out 0 max-datagram-size 200 vrf sys_mgmt
sflow collector-id 4 collector 192.168.7.2 port 6343 receiver-time-out 1000 max-datagram-size 200 vrf xe11_vrf
sflow collector-id 5 collector 172.10.1.1 port 65535 receiver-time-out 0 max-datagram-size 200 vrf xe10_10_vrf
sflow collector 192.168.7.2 port 65530 receiver-time-out 1000 max-datagram-size 200
sflow collector-id 2 collector 10.1.1.1 port 1024 receiver-time-out 345 max-datagram-size 400 vrf xe10_vrf

!

interface xe12
sflow direction ingress
 sampling-rate 1029
 max-header-size 120
exit
 sflow direction egress
 sampling-rate 1029
 max-header-size 120
exit

sflow enable

!

interface xe13
sflow direction ingress
 sampling-rate 1048
 max-header-size 140
exit
sflow enable
sflow collector-id 5

!

interface xe14
 sflow direction ingress
 sampling-rate 1048
 max-header-size 128
exit
 sflow direction egress
 sampling-rate 1048
 max-header-size 128
exit


sflow enable
sflow poll-interval 20
sflow collector-id 3

!

interface xe15
sflow direction ingress
 sampling-rate 1029
 max-header-size 120
exit

sflow enable

sflow collector-id 4

Validation

The following show output displays the sFlow details associated with multiple VRFs:

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S9510-30XC-A#show sflow detail

sFlow Feature: Enabled

sFlow Version: 5

Agent IP : 172.16.1.2

Collector 3:

IP: 172.20.1.1 Port: 6343

VRF : sys_mgmt

Maximum Datagram Size(bytes): 200

Receiver timeout(sec) : 0

Collector 4:

IP: 192.168.7.2 Port: 6343

VRF : xe11_vrf

Maximum Datagram Size(bytes): 200

Receiver timeout(sec) : 0

Collector 5:

IP: 172.10.1.1 Port: 65535

VRF : xe10_10_vrf

Maximum Datagram Size(bytes): 200

Receiver timeout(sec) : 0

Collector 1:

IP: 192.168.7.2 Port: 65530

VRF :

Maximum Datagram Size(bytes): 200

Receiver timeout(sec) : 0

Collector 2:

IP: 10.1.1.1 Port: 1024

VRF : xe10_vrf

Maximum Datagram Size(bytes): 400

Receiver timeout(sec) : 0

sFlow Port Detailed Information:

Interface Collector Packet-Sampling Packet-Sampling Counter-Polling Maximum Header

ID Rate Count Interval Count Size(bytes)

Ingress Egress Ingress Egress (sec) Ingress Egress

--------- --------- ----------------------- ----------------------- ----------------------- --------------------

xe12 1 1029 1029 0 0 0 0 120 120

xe13 5 1048 0 0 0 0 0 140 0

xe14 3 1048 1048 0 0 20 1248 128 128

xe15 4 1029 0 0 0 0 0 120 0

xe16 2 2048 3020 0 0 0 0 140 128

Glossary

Key Terms/Acronym

Description

PDU

A unit of data transmitted as a composite by a protocol.

sFlow

Sampled Flow data sFlow (sFlow) is the standard for monitoring high-speed switched and routed networks. The sFlow monitoring system consists of an sFlow Agent which is embedded in a switch or router and an sFlow Collector.