The maximum bits-per-second of traffic that may be
transmitted by this port's queue on egress.
hpEgressRateLimitPortControlMode must be configured to use
egressRateLimitPerQueue for this to take effect. A value
of 0-percent for any queue means that no traffic will ever
be transmitted on this port for that egress queue. The
values for each queue must not exceed the bits-per-second
capability of the current network link speed.