Netflow and cisco switch

[sanjar200994]

Hi everyone, I have a question. Is it possible to monitoring traffic of cisco switch with netflow. Now I can monitoring routers but it doesn't w

[sanjar200994]

But it doesn't work with switch 

[balaji.bandi]

But it doesn't work with switch 

what does not work ? you need to provide some evidence what you have tried ?

Also provide information below :

1. switch model

2. IOS running

3. what License

4. what config you applied ?

[sidshas03]

! Enable NetFlow globally
ip flow-export version 9
ip flow-export destination <collector IP address> <collector port>

! Monitor traffic on an interface
interface GigabitEthernet1/0/1
 ip flow ingress
 ip flow egress

Once you have enabled NetFlow on the switch and configured it to export NetFlow records to a collector, you can use a NetFlow analysis tool, such as PRTG, SolarWinds, or Scrutinizer, to view and analyze the NetFlow data.

I hope this helps! Let me know if you have any other questions.

[sanjar200994]

I tried config like you. And I tried to use Netflow analyzer and prtg. With router it works without problem but doesn't work with switch 

[balaji.bandi]

check below guide : (that explain you limitations)

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/15-0_1_se/configuration/guide/3750xcg/swmnetflow.html

[Joseph W. Doherty]

Depends on switch's capabilities and possibly IOS version, feature set, licensing.

[sanjar200994]

I have catalyst 3750, now can't remember iOS version. But sure that it latest version for this switch 

[Joseph W. Doherty]

What 3750 variant?  I recall (???) the 3750 and 3750G didn't support Netflow, the 3750E supported Netflow, with an optional module, which only applied to the ports on the module, and I don't recall the situation for the 3750-X.

Correction (?), it looks like it was the 3750-X that accepted a Netflow module, the C3KX-SM-10G.

[sanjar200994]

Yes I checked, I have 3750x and I try to read traffic 1/0/1. But how I understood I can read traffic just if I have 10g module?

[Joseph W. Doherty]

I believe that's correct, but it's not just any 10g module, it must be one particular module.