IvS how to check throughput for Profinet with PRP

Products

• VMware NSX

Issue/Introduction

Industrial vSwitch (IvS) is for realitime applicatrion that requires low latency forwarding. It supports industrial ethernet Profinet and Parallel Redundancy Protocol (PRP) is used for redundancy. This KB article describe how to check throughput of Profinet with PRP.

 

Environment

4.2.x

Resolution

For redundancy using PRP, IvS can have two connections for LAN A and LAN B, and it sends the same PRP packets for both LAN A and LAN B. Reciving side will pick up the first arrived packets from etheir LAN A or LAN B. 

PRP uses Pseudo uplink to handle PRP frames to/from both LAN A and LAN B. The Pseudo uplink is called vmnic128 and combines two uplinks of LAN A and LAN B.

To monitor the throughput for profinet traffic with PRP on IvS, you can use the esxtop command, but you need to look for data against vmnic128 row. This shows the throughput for Profinet before or after PRP processing.

The steps are below:
- SSH to ESXi host 
- Run esxtop command
- Enter n

12:54:07am up 7 days 16:24, 3654 worlds, 11 VMs, 21 vCPUs; CPU load average: 0.29, 0.29, 0.29

 PORT-ID USED-BY TEAM-PNIC DNAME PKTTX/s MbTX/s PSZTX PKTRX/s MbRX/s PSZRX %DRPTX %DRPRX
(snip)
 XXXXXXXX0 vdr-vdrPort vmnic128 DvsPortset-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
 XXXXXXXX1 YYYYYY1:<VM name #1> vmnic128 DvsPortset-1 19105.04 8.75 60.00 11262.89 5.16 60.00 0.00 0.00
 XXXXXXXX2 YYYYYY2:<VM name #2> vmnic128 DvsPortset-1 19104.70 8.75 60.00 11135.27 5.10 60.00 0.00 0.00
 XXXXXXXX3 YYYYYY3:<VM name #3> vmnic128 DvsPortset-1 19104.70 8.75 60.00 13544.43 6.20 60.00 0.00 0.00
 XXXXXXXX4 YYYYYY4:<VM name #4> vmnic128 DvsPortset-1 19104.35 8.75 60.00 11258.73 5.15 60.00 0.00 0.00
 XXXXXXXX5 YYYYYY5:<VM name #5> vmnic128 DvsPortset-1 19105.39 8.75 60.00 13544.78 6.20 60.00 0.00 0.00
 XXXXXXXX6 YYYYYY6:<VM name #6> vmnic128 DvsPortset-1 19106.08 8.75 60.00 13545.64 6.20 60.00 0.00 0.00
 XXXXXXXX7 YYYYYY7:<VM name #7> vmnic128 DvsPortset-1 18100.56 8.29 60.00 10684.79 4.89 60.00 0.00 0.00
 XXXXXXXX8 YYYYYY8:<VM name #8> vmnic128 DvsPortset-1 19106.26 8.75 60.00 13518.77 6.19 60.00 0.00 0.00