The value of iesIfAllowUnmatchingSubnets specifies
if subscriber hosts with a subnet that does not match
any of the subnets configured on this interface, are
allowed.
This object is only relevant if the value of the object
iesIfType in this conceptual row is equal to 'subscriber';
otherwise, 'false' is the only allowed value.
The value of iesIfAllowUnmatchingSubnets can only be set
to 'true' if the number of subnets (vRtrIpAddrTable)
configured on this interface is between one and 255.
The value of iesIfAllowUnmatchingSubnets can only be set
to 'true' while in the corresponding conceptual row in the
TIMETRA-VTR-MIB::vRtrIfTable the values of
vRtrIfUnnumbered and vRtrIfUnnumberedIf are set to their
default values.