HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

5-64
Quality of Service (QoS): Managing Bandwidth More Effectively
QoS Queue Configuration
Mapping of Outbound Port Queues. The default mapping of 802.1p
priorities to outbound port queues is shown in Table 5-10.
Table 5-10. Mapping of Outbound Queues
Impact of QoS Queue Configuration on Guaranteed Minimum Band-
width (GMB). Changing the number of queues removes any bandwidth-min
output settings in the startup configuration, and automatically re-allocates the
GMB per queue as shown in Table 5-11. For the switches covered in this guide,
the actual minimum guaranteed bandwidth allocated for each queue is accu-
rate to +/- six percent of the expected value.
Table 5-11. Default GMB Percentage Allocations per QoS Queue Configuration
Note For more information on configuring GMB, refer to the chapter titled “Port
Traffic Controls” in the Management and Configuration Guide.
802.1p
Priority
8 Queues
(default)
4 Queues 2 Queues
1 (lowest) 1
1
1
22
0 (normal) 3
2
34
4 5
3
2
56
6 7
4
7 (highest) 8
802.1p
Priority
8 Queues (default) 4 Queues 2 Queues
Queue GMB Queue GMB Queue GMB
1 (lowest) 1 2%
18%
120%
223%
0 (normal) 3 30%
217%
3410%
4 5 10%
330%
280%
5610%
6 7 15%
445%
7 (highest) 8 20%