Quality of Service (QoS): Managing Bandwidth More Effectively
Preparation for Configuring QoS
All ports are configured for
five QoS device priorities.
VLANs 111 and 222 are
configured for QoS priority.
Ports 1 and 2 use 12 rules; 10 for implementing the 5 device
priority QoS instances and one each for implementing the
2 VLAN QoS instances (111 and 222).
Ports 3 and 4 use 11 rules; 10 for implementing the 5 device
priority QoS instances on 1 for implementing the single
VLAN QoS instance (VLAN 222).
The remaining ports use only ten rules for implementing
the five device priority QoS instances.
Figure 8-4. Example of QoS Resource Usage with Device-Priority and VLAN QoS Implemented
Table 8-11. Per-P ort Resource Usage in Figure
8-4
Port Five QoS Device
Priorities
VLAN 111 VLAN
222
Rules Usage
Yes Yes Yes 2 rules per device priority QoS instance
(10 rules) (1 rule) (1 rule) 1 rule per VLAN QoS instance
Yes Yes Yes 2 rules per device priority QoS instance
(10 rules) (1 rule) (1 rule) 1 rule per VLAN QoS instance
Yes No Yes 2 rules per device priority QoS instance
(10 rules)
Yes No Yes 2 rules per device priority QoS instance
(10 rules)
5 - 24 Yes No No 2 rules per device priority QoS instance
(10 rules)
8-20
1
2
3
4
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