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.
Port numbering on the motherboard
Ports are numbered 0a, 0b, 0c, 0d…
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.