Please check you have the latest firmware version installed.(16.22.1002)
ibv_devinfo will give you your fw version.
mst status -v (to see your current device)
mlxconfig -d /dev/mst/<your mst device> set HOST_CHAINING_MODE=1
See the release notes of the FW here:
Thanks for your answer! The document you refer to states that
Both ports should be configured to Ethernet when host chaining is enabled.
Is there any way to connect the four nodes without a switch using native InfiniBand?
Only ethernet is supported.
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