I agree, it can (and is) confusing when the manufacturers of the various components cannot agree if port numbering starts at zero or one.  So, the designer is left with the following decision on mapping, using two components, one starting at zero, the other starting at one:  0->1, 1->2  or 0->2, 1->1  Isilon chose the mapping and added the label that you see in the picture to help, visually.  If we chose the opposite mapping, we'd hear from 'the other side' just as loudly [IMAGE]
I am curious who's bright idea it was to designate port 1 and port 2 exactly the opposite of how they are designated with LEDs. It's not just a labeling issue,  if i unplug the cable from the top port LED next to 1 goes out but within Isilon i get an alert about interface B (or something of that nature). Imagine how confusing it is to troubleshoot connectivity issues.  [IMAGE]
10G Ports and Isilon labeling