This is the sustained rate permitted by the rate
limit.
Writing to this object also requires writing a value of
true(1) to cportQosRLConfigEnable at the same time.
This object is deprecated and replaced by cbQosPoliceCfgRate
in CISCO-CLASS-BASED-QOS-MIB.
cbQosPoliceCfgRate is in cbQosPoliceCfgEntry, which can be
queried using ifIndex and cbQosPolicyDirection in the same
fashion as mentioned in cportQosRLConfigEnable.