Applicable to AU only.
Not applicable to BreezeNET-B products.
Sets the upper limit for the number of SUs
that can be associated with the AU.
Range: For regular AUs (AU-BS, AU-SA, AU)
the range is from 0 to 512 if encryption is disabled
the range id form 0 to 124 if encryption is enabled
For AUS-BS and AUS-SA with SW version 4.0 and higher
the range is between 0 to 8 or 25 (via licensing).
For AUS-BS and AUS-SA with SW version below 4.0 the range
is between 0 to 5.
BreezeNET-B products return 65535.