How FC initiator ports are labeled
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All FC initiator ports on ONTAP systems are identified by a number and a letter. Labeling differs depending on whether the ports are on the motherboard or cards in expansion slots.
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Port numbering on the motherboard
Ports are numbered 0a, 0b, 0c, 0d…
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Port numbering on expansion cards
Ports are numbered according to the slot in which the expansion card is installed. A card in slot 3 yields ports 3A and 3B.
The FC initiator ports are labeled 1 and 2. However, the software refers to them as A and B. You see these labels in the user interface and system messages displayed on the console.