0 Replies Latest reply on Sep 19, 2018 3:21 AM by JaroTryk

    Strange behavior in ESXi for an network card with Npar - a feature or bug?

    JaroTryk Lurker

      Hi All


      I cannot explain the following issue: Ping transmission fails for the configuration when vmnics from the same partition are added to the same vSwitch.



      Hardware used:


      - Network adapter: four-port Intel X710 with Dell firmware

      - ESXi: 6.7 GA

      - Npar partitions: four partitions, two vmnics per each partition (one vmnic master and one vmnic slave)

      - Two servers Dell R730 connected by an external physical switch. NPAR enabled only in one server (SUT).



      System Under Test (SUT):


      Both physical adapters are active. Vmnic16 - master and vmnic20 - slave, both of the same partition.

      Basically,  I pinged these three vmkernel adapters from other server. Ping to the first one (vmk3) failed.  Is it a feature or a bug?



      Below, I have attached ESXi console screenshot to make my setup more understandable:


      1. Partition pairs. We can see two partition pairs which are up: the green and yellow one




      2. ESXTOP view of the testing setup:



      3. Ping test results:



      If I change the setup and replace a slave vmnic (vmnic20 - green partition) with a slave vmnic from the second partition (vmnic21 - yellow partition) then all ping tests are passed.