Interfaces
Page 560 7750 SR Interface Configuration Guide
Default No policer-control policies are specified by default. You must explicitly specify a policy.
Parameters policy-name — Specifies the name of the policer-control policy to use for the queue-group.
ingress-buffer-allocation
Syntax ingress-buffer-allocation hundredths-of-a-percent
no ingress-buffer-allocation
Context config>card>fp>ingress
Description This command allows the user to configure an ingress buffer allocation percentage per forwarding plane
from 20.00% to 80.00%. Ingress buffer allocation applies to user-accessible buffers (total buffers less those
reserved for system use).
The ingress buffer allocation percentage determines how much of the user-accessible buffers will be avail-
able for ingress purposes. The remaining buffers will be available for egress purposes.
NOTE: This feature is supported on all 50G FP2-based line cards and 100G/200G FP3-based line cards.
The no form of this command returns the ingress buffer allocation to the default value.
Default The default value is 50.00%, which emulates the legacy behavior.
max-rate
Syntax max-rate {kilobits-per-second | max}
no max-rate
Context config>card>fp>ingress>acc>qgrp>policer-ctrl-over
config>card>fp>ingress>network>qgrp>policer-ctrl-over
Description This command defines the parent policer’s PIR leaky bucket’s decrement rate. A parent policer is created for
each time the policer-control-policy is applied to either a SAP or subscriber instance. Packets that are not
discarded by the child policers associated with the SAP or subscriber instance are evaluated against the par-
ent policer’s PIR leaky bucket.
For each packet, the bucket is first decremented by the correct amount based on the decrement rate to derive
the current bucket depth. The current depth is then compared to one of two discard thresholds associated
with the packet. The first discard threshold (discard-unfair) is applied if the FIR (Fair Information Rate)
leaky bucket in the packet’s child policer is in the confirming state. The second discard threshold (discard-
all) is applied if the child policer's FIR leaky bucket is in the exceed state. Only one of the two thresholds is
applied per packet. If the current depth of the parent policer PIR bucket is less than the threshold value, the
parent PIR bucket is in the conform state for that particular packet. If the depth is equal to or greater than the
applied threshold, the bucket is in the violate state for the packet.
If the result is “conform,” the bucket depth is increased by the size of the packet (plus or minus the per-
packet-offset setting in the child policer) and the packet is not discarded by the parent policer. If the result is
“violate,” the bucket depth is not increased and the packet is discarded by the parent policer. When the par-
ent policer discards a packet, any bucket depth increases (PIR, CIR and FIR) in the parent policer caused by
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