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  • 1.  VSAN Networking

    Posted Feb 22, 2016 04:19 PM

    I have a cluster of ESXi Servers where servers with 10Gb uplinks are mixed with servers with 1Gb uplinks.  Are there any issues with this in deploying VSAN on every host in the cluster?

  • 2.  RE: VSAN Networking

  • 3.  RE: VSAN Networking

    Posted Mar 15, 2016 08:23 PM

    Ok thanks - I'm particularly interested in networking as it pertains to VSAN though...

  • 4.  RE: VSAN Networking

    Posted Mar 17, 2016 06:38 PM

    For a hybrid config (SDD cache with traditional drives for Capacity) you'll need a dedicated 1GbE uplink for the VMkernel interface that has VSAN Traffic Enabled.

    For an all-flash config, you'll need at least a 10GbE connection (overall).

    Remember that Virtual SAN 6 includes the ability to run Distributed Switches (vDS) and you can use Network IO Control if you'd like.

    Also, all hosts (contributing disk groups or not) will need to meet this requirement.

  • 5.  RE: VSAN Networking

    Posted Mar 23, 2016 08:20 PM

    OK great - thanks.  Does VMware officiallly list 10Gb connections as a requirement if I have all flash drives in my VSAN enabled server?

  • 6.  RE: VSAN Networking

    Posted Mar 24, 2016 12:09 PM

    Good morning, yes, AFA requires 10 Gb.  Thank you, Zach.

    Page 18.  http://www.vmware.com/files/pdf/products/vsan/VSAN_Design_and_Sizing_Guide.pdf

  • 7.  RE: VSAN Networking

    Posted Mar 25, 2016 08:07 PM

    Hybrid required a dedicated 1GbE connection.

    All-Flash requires 10GbE, but not a dedicated 10GbE connection. It can be partial.

  • 8.  RE: VSAN Networking

    Posted Feb 22, 2016 07:47 PM

    Good afternoon, I believe it would work.  I might actually dial the 10 Gb links to 1 Gb, just to be uniform.  Thank you, Zach.

  • 9.  RE: VSAN Networking

    Posted Mar 31, 2016 07:00 AM

    I think "it depends" on the workload.

    We have VSAN hybrid cluster where each host has a dedicated 10GE NIC for VSAN (we changed this from the initial design where we wanted to have also VM and management traffic as a standby config for this NIC).

    During our load testing we saw spikes where the 10GE VSAN link is nearly saturated.

    Driving VSAN with only 1GE NICs from my point of view would only be possible for small workload szenarios.