Table 6: Administrative Rate Example - Alcatel-Lucent 7210 SAS E OS Quality Of Service Manual

Peak Information Rate
The peak information rate (PIR) defines the maximum rate at which packets are allowed to exit the
meter. It does not specify the maximum rate at which packets may enter the meter; this is governed
by the meter's ability to absorb bursts and is defined by its maximum burst size (MBS).
When defining the PIR for a meter, the value specified is the administrative PIR for the meter. The
7210 SAS E has a number of native rates in hardware that it uses to determine the operational PIR
for the meter. The user has some control over how the administrative PIR is converted to an
operational PIR should the hardware not support the exact CIR and PIR combination specified.
Refer to the interpretation of the administrative PIR in
The PIR for meter is provisioned on service ingress and access uplink/network ingress within
service ingress QoS policies and network QoS policies, respectively
Adaptation Rule for Meters
The adaptation rule provides the QoS provisioning system with the ability to adapt the
administrative rates provisioned for CIR and PIR, to derive the operational rates based on the
underlying capabilities of the hardware. The administrative CIR and PIR rates are translated to
actual operational rates enforced by the hardware meter. The rule provides a constraint, when the
exact rate is not available due to hardware capabilities.
Hardware supports rates to be in the multiple of 64kbps, the system will attempt to find the best
operational rate depending on the defined constraint. The supported constraints are:
•
•
•
Table 6
specified in the CLI.

Table 6: Administrative Rate Example

Administrative Rate
7210 SAS E OS Quality of Service Guide
Minimum: Find the next multiple of 64kbps that is equal to or higher than the specified
rate.
Maximum: Find the next multiple of 64kbps that is equal to or less than the specified rate.
Closest: Find the next multiple of 64kbps that is closest to the specified rate.
lists the rate values configured in the hardware when different PIR or CIR rates are
Operation Rate
64
65
1275
Adaptation Rule for Meters on page
Operation Rate
(Min)
64
128
128
QoS Policies
Operation Rate
(Max)
64
64
64
29.
(Closest)
64
64
128
Page 29