Describe an InfiniBand subnet correctly — entities, addresses, link rates and IPoIB — and read a host's IB state without guessing.

1. 1.1 Who's who in an InfiniBand subnetNobody on the call knows who the master isU
2. 1.2 LIDs, GIDs, GUIDs and LMCThe node that vanished at 03:12U
3. 1.3 Speeds, widths, and the link that says SDRA photograph of an iDRAC screenAn
4. 1.4 IPoIB: the management plane on an IB fabricThe tenant network that comes up and answers nothingAp
5. 1.5 Reading a host's IB state in 60 secondsThe card the technician is already holdingAp
6. Checkpoint