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HasanHasib's avatar
HasanHasib
Copper Contributor
Jul 30, 2023

SR-IOV Recommendations for Azure Stack HCI Cluster

Hi All,

 

We have Marvell FastLinQ 41000 Series 25Gb Ethernet NICs.

 

For Compute/Virtualization: 2 NICs will be used and SET will be configured

 

For RDMA: We are planning to use 2 NICs with iWARP

 

What are the recommendations/best practices to enable or disable the SR-IOV for these intents???

 

For Compute/Virtualization: Should SR-IOV be enabled or disabled?

 

For RDMA: Should SR-IOV be enabled or disabled?

 

Thank you!

Azure Stack HCI

1 Reply

  • Deleted's avatar
    Deleted
    Oct 22, 2023

    HasanHasib it always make sense to use SR-IOV if possible, because you'll never know if. Recreating the networking (as you need to, for virtual switch) just to enable it is not a good idea. 

     

    don't forget to check your UEFI and settings of NICS on SR-IOV and virtual functions (should be 127, not 8), then creating a vSwitch with SR-IOV enabled.

     

    I would advise you to use Network ATC instead of manual config and if possible using RoCE instead of iWARP (Network ATC is not designed for iWARP), especially if your Storage is directly connected I would use RoCE as it doesn't cost you a thing. 

    Unfortunately I have heard that Marvell doesn't produce these iWARP / RoCE NICs anymore.

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