xcmGenOptionNextIndex
1.3.6.1.4.1.253.8.51.10.2.1.10
The value of 'xcmGenOptionIndex' corresponding to the next
'chained' conceptual row in the 'xcmGenOptionTable', or zero
if this is the last associated conceptual row in a particular
vertical 'chain' within a given set.
Usage: Generally, reconfiguration options (of similar or unlike
type) are 'chained' vertically via '...[Next|Previous]Index'.
But, in the case where particular communications options MUST
be 'tightly coupled', they SHOULD be 'shelved' horizontally via
'...[Family|Previous]Index' (eg, an IP address and an IP subnet
mask).