Alcatel-Lucent 7950 Quality Of Service Manual page 262

Service Egress QoS Policy Forwarding Class Commands
second value must be expressed as an integer and defines the rate in kilobits-per-second. The integer
value is multiplied by 1,000 to derive the actual rate in bits-per-second. When max is specified, the
maximum policer rate used will be equal to the maximum capacity of the card on which the policer is
configured. If the policer rate is set to a value larger than the maximum rate possible for the card, then
the PIR used is equivalent to max.
Values
Values
cir {max | kilobits-per-second} — The optional cir keyword is used to override the default CIR rate of the
policer. Specifying the keyword max or an explicit kilobits-per-second parameter directly following the
cir keyword is required and identifies the policer's profiling rate for the CIR leaky bucket. When the
policer is first created, the profiling rate defaults to 0 Kbps. The kilobits-per-second value must be
expressed as an integer and defines the rate in kilobits-per-second. The integer value is multiplied by
1,000 to derive the actual rate in bits-per-second.
Values
stat-mode
Syntax stat-mode {no-stats | minimal | offered-profile-no-cir | offered-profile-cir | offered-total-cir |
offered-profile-capped-cir | offered-limited-capped-cir}
no stat mode
Context config>qos>sap-egress>policer
config>qos>queue-group-templates>egress>queue-group
Description The sap-egress QoS policy's policer stat-mode command is used to configure the forwarding plane
counters that allow offered, output and discard accounting to occur for the policer. An egress policer has
multiple types of offered packets (soft in-profile and out-of-profile from ingress and hard in-profile and out-
of-profile due to egress profile overides) and each of these offered types is interacting with the policer's
metering and profiling functions resulting in colored output packets (green, yellow and red). Due to the
potential large number of egress policers, it is not economical to allocate counters in the forwarding plane
for all possible offered packet types and output conditions. Many policers will not be configured with a CIR
profiling rate and not all policers will receive explicitly re-profiled offered packets. The stat-mode
command allows provisioning of the number of counters each policer requires and how the offered packet
types and output conditions should be mapped to the counters.
While a no-stats mode is supported which prevents any packet accounting, the use of the policer's parent
command requires at the policer's stat-mode to be set at least to the minimal setting so that offered stats are
available for the policer's Fair Information Rate (FIR) to be calculated. Once a policer has been made a child
to a parent policer, the stat-mode cannot be changed to no-stats unless the policer parenting is first
removed.
Each time the policer's stat-mode is changed, any previous counter values are lost and any new counters are
set to zero.
Each mode uses a certain number of counters per policer instance that are allocated from the forwarding
plane's policer counter resources. You can view the the total/allocated/free stats by using the tools dump
system-resources command. If insufficient counters exist to implement a mode on any policer instance, the
stat-mode change will fail and the previous mode will continue unaffected for all instances of the policer.
Page 262
max or 1—2000000000
max or 0—2000000000
max or 0—20,000,000
7950 XRS Quality of Service Guide