Soft-RoCE

[Suraj Gour]

Hi All,

I am trying to simulate Soft-RoCE using mininet and Sflow-RT framework.

How do we use Sflow-RT analysing or viewing RoCE traffic. 

Can anyone help or provide some pointer. Please let me know in case more information required.

Thanks

Suraj Gour

[Peter Phaal]

On Wednesday, August 15, 2018 at 10:49:04 PM UTC-7, Suraj Gour wrote:

I am trying to simulate Soft-RoCE using mininet and Sflow-RT framework.

How do we use Sflow-RT analysing or viewing RoCE traffic. 

Can anyone help or provide some pointer. Please let me know in case more information required.

sFlow-RT doesn't currently have InfiniBand / RoCE / NVMe decode support. However, you should be able to identify the traffic using ethernetprotocol or udpdestinationport filters, i.e.

setFlow('rocev1', {keys:'macsource,macdestination',value:'bytes',filter:'ethernetprotocol=35093'});

setFlow('rocev2', {keys:'ipsource,ipdestination',value:'bytes',filter:'udpdestinationport=4791'});

See, Defining Flows:

https://sflow-rt.com/define_flow.php

Are there any specific RoCE attributes that you are interested in including in the flow definitions? If there is value in decoding additional fields we would consider adding them to sFlow-RT.

The flow-trend application provides a convenient way of defining and trending flows. Since you are also using Mininet you might also be interested in the mininet-dashboard application:

https://sflow-rt.com/download.php#applications

[Peter Phaal]

We just uploaded a new version, 2.3-r1290, of sFlow-RT that decodes InfiniBand Global Routing and Base Transport headers needed to report on RoCE v1 and v2 traffic, https://en.wikipedia.org/wiki/RDMA_over_Converged_Ethernet.

You can see the new ibgr* and ibbt* listed under http://localhost:8008/flowkeys/html (provided that there is RoCE traffic present). The ibbtopname flow key reports "RDMA_WRITE" and "RDMA_READ" operations.

[Suraj Gour]

Thanks Peter. As of now not looking for any specific RoCE attributes. Will explore this solution and let you know. 

[Peter Phaal]

FYI The following article provides additional information on RoCE with sFlow-RT:

https://blog.sflow.com/2018/08/rdma-over-converged-ethernet-roce.html

[Suraj Gour]

Thanks Peter.

I have now upgraded sFlow version to 2.3-r1291 and installed Flow-Trend app.

Regards,

Suraj

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