8 Replies Latest reply on Feb 8, 2019 12:18 AM by GuyManDude

    NSX CROSS VC  NOT WORKING

    Swadeey Lurker

      Hi Gurus,

       

      I  have been struggling to  get my  universal logical switch working , what i have  done is the following:

       

      1. The universal switches created from the primary NSX manager  have been propagated  to secondary NSX manager .

      2. After attaching the VM  on primary site to the universal switch called USAPP  and the  VM on secondary site to the same universal switch. The virtual machines are unable to ping each other  but the   virtual machines on the same site are able to ping each other.

      3. Universal Transport Zone, Universal Segment ID  has been created as well.

      4  VxVLAN  has been configured  , clusters in the respective site attached

       

      Please can someone guide on where to start troubleshooting or to fix the issue .

       

      Regards

      Swapnil

        • 1. Re: NSX CROSS VC  NOT WORKING
          Swadeey Lurker

          Please can someone help.

          • 2. Re: NSX CROSS VC  NOT WORKING
            yak9 Enthusiast

            Are VTEPs on site A reachable by VTEPs on site B?

            What is MTU setting on site interconnect?

             

            You can run checks with following command from site A host:

            ping ++netstack=vxlan <site B host VTEP IP address> -s 1572 -d

            • 3. Re: NSX CROSS VC  NOT WORKING
              Swadeey Lurker

              Thanks for your response.

              Could you please explain what do you mean by MTU setting on site interconnect?

               

              Regards

              Swapnil

              • 4. Re: NSX CROSS VC  NOT WORKING
                larsonm Expert

                The recommended MTU size for VXLAN traffic is 1600.  All devices through with VXLAN traffic flows, from VTEP to VTEP, should have an MTU of 1600 or greater.

                 

                This link proivdes a way to see if connectivity exists among VTEPs from within the logical switch.  It does the same command string that yak9 provided, except throught the GUI, and saves you from having to go from host to host to check connectivity.

                NSX 6 Documentation Center

                 

                Also, try restarting the netcpa service on the hosts experiencing issues.

                • 5. Re: NSX CROSS VC  NOT WORKING
                  dverma20 Lurker
                  vExpert

                  Just wondering, are you using hardware based VTEPs?

                  • 6. Re: NSX CROSS VC  NOT WORKING
                    rikherlaar Novice

                    and verify the /var/log/netcpa.log - clearly VTEP comms is not okay...

                    /r

                    • 7. Re: NSX CROSS VC  NOT WORKING
                      GuyManDude Lurker

                      Rather than starting a new thread I'm going to use this old one because I need to understand the correct answer provided to it.  I have Cross VC setup but hosts on the same Logical Switch cannot ping each other.  The VTEP's on site A are 20.x.x.x/8 and 30.x.x.x/8 on site B.  The correct answer suggested those are supposed to be able to ping each other but how would you accomplish that without some kind of router?


                      Thanks for your thoughts.

                       

                      Original post and correct answer below for reference.

                      ==========================================================================================

                      Hi Gurus,

                       

                      I  have been struggling to  get my  universal logical switch working , what i have  done is the following:

                       

                      1. The universal switches created from the primary NSX manager  have been propagated  to secondary NSX manager .

                      2. After attaching the VM  on primary site to the universal switch called USAPP  and the  VM on secondary site to the same universal switch. The virtual machines are unable to ping each other  but the   virtual machines on the same site are able to ping each other.

                      3. Universal Transport Zone, Universal Segment ID  has been created as well.

                      4  VxVLAN  has been configured  , clusters in the respective site attached

                       

                      Please can someone guide on where to start troubleshooting or to fix the issue .

                       

                      Regards

                      Swapnil

                      yak9
                      Correct Answerby yak9 on Jun 23, 2016 5:32 AM

                       

                      Are VTEPs on site A reachable by VTEPs on site B?

                      What is MTU setting on site interconnect?

                       

                      You can run checks with following command from site A host:

                      ping ++netstack=vxlan <site B host VTEP IP address> -s 1572 -d

                      • 8. Re: NSX CROSS VC  NOT WORKING
                        GuyManDude Lurker

                        I added a router between them and it solved the problem.