H3C Technologies H3C SecPath F1000-E - Manual (Page 516)

8
Type
Number
of
queues
Advantages Disadvantages
CBQ
Configura
ble (0 to
64)
• Flexible traffic classification based on
various rules and differentiated queue
scheduling mechanisms for expedited
forwarding (EF), assured forwarding
(AF) and best-effort (BE) services.
• Highly precise bandwidth guarantee
and queue scheduling on the basis of
AF service weights for various AF
services
• Absolutely preferential queue
scheduling for the EF service to meet the
delay requirement of real-time data;
overcoming the disadvantage of PQ
that some low-priority queues are not
serviced by restricting the high-priority
traffic.
• WFQ scheduling for best-effort traffic
(the default class).
The system overheads are large.