Identifies a row in the Board table that is defined by this boardEntry block of objects.
Integer
Read-only
p.4.3.1.1.n, where n is the entry number.
If the board is turned off using Hot Swap, the board index and values still exist, but the Trunk MIB does not see any lines. When the board is extracted, the board index is also removed.
A board that is inserted uses the next available index number.