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Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 42 Configuring PFC QoS
Understanding How PFCQoS Works
• 1p7q8t indicates the following:
–
One strict-priority queue
–
Seven standard queues, each with eight thresholds, each threshold configurable as either
WRED-drop or tail-drop
Module to Queue Type Mappings
The following tables show the module to queue structure mapping:
• Supervisor Engine Module QoS Queue Structures
• Ethernet and Fast Ethernet Module Queue Structures
• Gigabit and 10/100/1000 Ethernet Modules
• 10 Gigabit Ethernet Modules
Table 42-2 Supervisor Engine Module QoS Queue Structures
Supervisor Engines
Ingress
Queue and
Drop
Thresholds
Ingress
Queue
Scheduler
Egress
Queue and
Drop
Thresholds
Egress
Queue
Scheduler
Total Buffer
Size
Ingress
Buffer Size
Egress
Buffer Size
WS-SUP720 1p1q4t — 1p2q2t WRR 512 KB 73 KB 439 KB
WS-SUP720-3B
WS-SUP720-3BXL
WS-SUP32-10GE 2q8t WRR 1p3q8t DWRR
SRR
10 Gigabit Ethernet ports 193 MB 105 MB 88 MB
Gigabit Ethernet port 17.7 MB 9.6 MB 8.1 MB
WS-SUP32-GE 17.7 MB 9.6 MB 8.1 MB
WS-X6K-S2U-MSFC2 1p1q4t — 1p2q2t WRR 512 KB 73 KB 439 KB
WS-X6K-S2-MSFC2
WS-X6K-S2-PFC2
Table 42-3 Ethernet and Fast Ethernet Module Queue Structures
Modules
Ingress
Queue and
Drop
Thresholds
Ingress
Queue
Scheduler
Egress
Queue and
Drop
Thresholds
Egress
Queue
Scheduler
Total Buffer
Size
Ingress
Buffer Size
Egress
Buffer Size
WS-X6524-100FX-MM 1p1q0t — 1p3q1t DWRR 1,116 KB 28 KB 1,088 KB
WS-X6548-RJ-21
WS-X6548-RJ-45