Figure 26: Ingress Policer Threshold Determination And Output Behavior - Alcatel-Lucent 7950 Quality Of Service Manual

Ingress Explicit 'Out-of-Profile' State Packet Handling
PIR Threshold =
FIR Threshold = 0
Profile Capped
and CIR=0?
(CBS)
CIR Threshold = 0
Output Green?
Output Yellow
Profile Capped?
CIR State Honored
Internal State =
'Soft-Out-of-Profile'
Tail Drop = 'Low'
Ingress Queue

Figure 26: Ingress Policer Threshold Determination and Output Behavior

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Access Ingress
Policing
Parent
Discard-Unfair and
Discard-All
Thresholds Based
on Child Priority
(MBS)
Y
'priority high'?
High
Y
FIR Rate =0?
N
'profile in'?
Y Y
(CBS)
CIR Threshold = 2x
Discard: Handoff to
appropriate 'policer-
RED
HPol
output-queue' or
queue group queue
for accounting
GREEN/YELLOW
Y
'profile in'?
N Y
Internal State =
'Soft-In-Profile'
Tail Drop = 'High'
Ingress Queue
N
'profile in'?
Y Y
CIR State Ignored
Internal State =
'Soft-In-Profile'
Tail Drop = 'High'
Ingress Queue
(MBS)
N
PIR Threshold =
Low
N
FIR Threshold =
PIR Threshold
N N
'de1out and
'profile out'?
Dot1P DE=1?
Y
(CBS)
CIR Threshold = 0 CIR Threshold = 0
Ingress Queue
(Discarded)
N N
'de1out and
'profile out'?
Dot1P DE=1?
Y
Not Possible with Not Possible with
CIR Threshold = 0 CIR Threshold = 0
N N
'de1out and
'profile out'?
Dot1P DE=1?
Y
Always Yellow Always Yellow
Internal State = Internal State =
'Soft-Out-of-Profile' 'Soft-Out-of-Profile'
Tail Drop = 'Low' Tail Drop = 'Low'
Ingress Queue Ingress Queue
7950 XRS Quality of Service Guide
N
Profile Undefined
Y
(CBS) (CBS)
CIR Threshold = 1x
N
Profile Undefined
Internal State =
Y
'Soft-In-Profile'
Tail Drop = 'High'
Ingress Queue
N
Profile Undefined
Y
Internal State =
'Soft-Out-of-Profile'
Tail Drop = 'Low'
Ingress Queue
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