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):

      vSW1.jpg

      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

      portList.jpg

       

       

      2. ESXTOP view of the testing setup:

      ESXTOP.jpg

       

      3. Ping test results:

      Ping.jpg

       

      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.