This attribute specifies the holding priority of this connection.
Holding priority is used when there is an IMA group where some
physical links have failed. Holding priority determines the order in
which connections are released. 4 is the lowest holding priority and
is released first. 0 is a higher priority and is released last. The value
specified in this attribute will override whatever holdingPriority that
has been provisioned at the Vcd (or Vpd). If the value is left at the
default of noOverride, the holdingPriority provisioned at the Vcd
(or Vpd) will be used.