41-27
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
Understanding How PFC QoS 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 41-2
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 41-3
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