6 Replies Latest reply on Dec 20, 2019 2:17 AM by AutoEng

    vSphere 6.7. Stretched vSAN with vCenter High Availability (VCHA) across the 3 sites?

    Kitty Danvers Lurker



      We are looking to implement a stretched vSAN environment with up to 30 ESXi hosts (15 per site) and I am wondering if it is possible to also implement a stretched vCenter High Availability (VCHA) 'cluster' across the same infrastructure?


      Assuming it is... Is it possible/supported to use the same 'back end' witness networks for both vSAN and VCHA traffic or should they be kept separate from each other?


      We will use vSphere 6.7 U2 for the ESXi hosts & the vCenter VCSA (Embedded PSC).


      We will be using either VMware NSX or Cisco ACI for the VXLAN 'spanned' subnets between the two main sites.


      The two main sites are approx 30 KM apart from each other. For the vSphere Management, vMotion & vSAN traffic we will dedicate two diverse dark fiber paths with an aggregate bandwidth of 80 Gbps (2 x 40 Gbps). The RTT latency over this link is sub 5 ms.


      The third witness site is approx 40 KM from site A and approx 50 KM from site B and is connected to both via a 10 Gbps MPLS. Again, the RTT latency is sub 5 ms.



      VMware vSphere Stretched vSAN & VCHA - v0.1.jpg


      Any pointers/things to consider?