Indicates whether gBondLowUpRateCrossing and
gBondLowDnRateCrossing notifications should be generated
for this interface.
Value of true(1) indicates that the notifications are enabled.
Value of false(2) indicates that the notifications are
disabled.
This object is read-write for the -O subtype G.Bond ports.
It is irrelevant for the -R subtypes - attempts to read or
change this object for such ports MUST be rejected (in case of
SNMP with the error inconsistentValue).
This object maps to the TR-159 attribute
aGroupLowRateCrossingEnable.