問題文
A newly added InfiniBand switch has been cabled and powered, and its links are up at the physical layer, but the endpoints attached to it cannot be reached from the rest of the fabric. Which check should come first?
選択肢
- Whether the partition keys on the new switch match those on the existing switches, and a switch with a different key set will drop all traffic, whatever its source.
- Whether the link speed negotiated on each port matches what the switch on the other end of the cable supports, because a mismatch at that layer will bring the link up at a reduced width and the endpoints behind it will appear unreachable until the transceivers on both sides are replaced with a matched pair.
- Whether the new switch has the same firmware version as the others.
- Whether the fabric management entity has discovered the new switch and programmed it, because until it has, the ports are up but not in service.