Thanks Devin!
As Isilon clusters grow over time, and nodes are Smartfailed out, you may be left with a cluster that does not have contiguous node numbers.  If that ever happens, it is easy to change a node number to be what you need it to be.  The LNN is the Logical Node number and the lnnset command in isi config is used to change these LNN's.    To change node #8 to be node #6 in an Isilon cluster, you would issue the following commands:  # isi config >>> lnnset 8 6 >>> commit
How do I re-number Isilon nodes in a cluster?