5 Replies Latest reply on Jan 13, 2020 3:33 PM by scott28tt

    More than one VDS in vcenter for a single ESXi

    ajithkt22 Lurker

      We are planning to create two distributed switches in the same vcenter.


           First two ports of an ESXi server belong to uplink of one VDS

           Third and fourth ports of the same ESXi server belong to the uplink of second VDS


      We want both these networks to be isolated. That's why we are not trunking all the VLANs through a single port.


      Can you please confirm if this configuration is supported?


      For Vmotion do we need to create different vmkernel adapters on each switches or a single vmkernel is enough?


      Please advise if any additional recommendations need to be followed for this configuration.


      ESXi and Vcenter version is 6.5.

        • 1. Re: More than one VDS in vcenter for a single ESXi
          Amin Masoudifard Expert

          Network isolation for VDS design highly depends

          on your network security considerations. When you need to isolate the existing network traffics on the virtual infrastructure as same as the physical networking, so it's recommended to create more than one VDS and also separate the uplinks. It means you need to isolate the existing VLANs & Subnets, in both of the virtual and physical networking infrastructures.

          For choosing another VMKernel port for the vMotion traffic, you should calculate the transfer rate(I/O) and decide based on your many factors like the speed rate of the existing physical uplinks. For example, if you have 10Gbps p-NICs, no need to create different VMKernels. Although deciding to separate the VMKernel services or using the same VMKernel port is depends on the following factors:

          1. Security, Maybe you should plan to separate the Management, vMotion, FT, Replication subnets or even VLAN ID.

          2. Existing SAN Storage structure and storage communication design (physical HBA, SAN Switch and so on).

          3. Scalability, For future extending the network infrastructures.

          4. Using the separate physical switches to completely split the vMotion traffics.

          Please mark my comment as the Correct Answer if this solution resolved your problem
          1 person found this helpful
          • 2. Re: More than one VDS in vcenter for a single ESXi
            AlessandroRomeo68 Master



            • It is supported
            • a single vmkernel is sufficient

            it seems to me a normal configuration where you want to keep networks divided at the hardware level.



            • 3. Re: More than one VDS in vcenter for a single ESXi
              bewe Expert

              i have 8 switches spread across 52 host in 4 clusters - each cluster has 2 switches with 2 uplinks per switch.

              vmotion has different vmkernelports because of faster 25GBe-uplinks, but this is not a must.

              works without any problems

              • 4. Re: More than one VDS in vcenter for a single ESXi
                IRIX201110141 Master

                We have such a setup for ages because we want something phys. isolated on network level. So we have 2 vDS and the uplinks goes to different phys. switch gear.



                • 5. Re: More than one VDS in vcenter for a single ESXi
                  scott28tt Guru
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