We run into some issues when setting up a special VM (customized Linux) with Intel SR-IOV support enabled. The issues are:
1. We have to manually set MAC addresses for VFs
2. We have to manually change PF or VF MTU to make PF's is greater than or equal to VF's
Or else no traffic gets through VF interfaces in VM.
- For issue #1:
We found that the matched ixgbevf for our host Linux's ixgbe driver (version 3.17.3) is newer than the shipped ixgbevf in VM. It sounds like Intel moved the feature of setting VF MAC addresses from ixgbe to ixgbevf (VF MACs are set If I install the matched ixgbevf (version 2.10.3) to the VM).
Can someone confirm my guess or detail why this happens? What is the best way to deal with it?
- For issue #2:
We found that, for Intel 2p X520 card, I have to make sure PF MTU is greater than or equal to VF MTU.
Is this the limitation added to the newer ixgbe driver? Is this only for 82599-based adapters?