Foundation Summary 317
Foundation Summary
The Foundation Summary is a collection of tables and figures that provides a convenient review
of many key concepts in this chapter. For those of you already comfortable with the topics in
this chapter, this summary could help you recall a few details. For those of you who just read
this chapter, this review should help solidify some key facts. For any of you doing your final
preparation before the exam, these tables and figures will hopefully be a convenient way to
review the day before the exam.
Table 10-2 summarizes the various queuing techniques discussed in this chapter.
Table 10-3 summarizes the various queuing techniques discussed in this chapter.
Table 10-2
Queuing Summary
FIFO
Weighted Fair
Priority
Custom
No configuration
No queue lists; defines
congestive discard
threshold
Four queues: high,
medium, normal, and
low
Seventeen queues;
sixteen configurable
queues
No priority traffic
Low-volume traffic has
priority
High queue serviced
first; lower priority
queues serviced when
higher queues are
empty
Round-robin
Traffic dispatched on
first-come, first-served
basis
Traffic dispatched
based on conversation
Packet dispatching
Service threshold
dispatching
Table 10-3
Queuing Command Summary
Weighted Fair Queuing
Command
Function
fair-queue [congestive-discard-threshold]
Enables WFQ on an interface; optionally, a
congestive discard threshold can be specified;
range = 14096; default = 64.
Priority Queuing
Command
Function
priority-list list-number protocol protocol-name
{high | medium | normal | low} queue-keyword
keyword-value
Creates a protocol-specific entry for priority
queuing; optionally, a tcp/udp port number can
be specified for added control
continues