Support for SoftRoCE on KVM Guest with CentOS 7.6?

We are running KVM with libvirt on CentOS 7.6 with 100Gb ethernet MCX515A adapter. The network on the physical host is fine but our virtual guest nodes are communicating over a virtual ethernet bridge (br0) and they need RoCE to mount /lustre. Is Soft RoCE a reasonable option in this situation?

Hello James,

You should be able to use SoftRoCE in this case. Have you tried it?

https://community.mellanox.com/s/article/howto-configure-soft-roce

How Soft-RoCE works: Soft-RoCE driver implements the InfiniBand RDMA transport over the Linux network stack. It enables a system with standard Ethernet adapter to interoperate with hardware RoCE adapter or with another system running Soft-RoCE.

Please let me know…

Many thanks,

~Steve