312 Chapter 9: WAN Design Considerations
Foundation Summary
This section contains tables that provide a convenient review of many key concepts in this
chapter. If you are already comfortable with the topics in this chapter, this summary could help
you recall a few details. If you have just read this chapter, this review should help solidify some
key facts. If you are doing your final preparation before the exam, these tables are a convenient
way to review the day before the exam. Table 9-3 compares LAN and WAN characteristics.
Quality of Service Commands
This section describes the function and displays the syntax of QoS commands. For more
information about defaults and usage guidelines, see the corresponding chapter of the Quality
of Service Solutions Command Reference.
priority-group
To assign the specified priority list to an interface, use the priority-group interface
configuration command. To remove the specified priority group assignment, use the
no
form of
this command.
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p list-number
n
n
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no
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priority-list default
To assign a priority queue for packets that do not match any other rule in the priority list, use
the priority-list default global configuration command. To return to the default or assign
normal as the default, use the no
form of this command.
Table 9-3
Comparison of LAN and WAN Characteristics
LAN
WAN
Fast interfaces
Slow interfaces
VLANs
No VLANs
Usually no tunneling
Tunneling is used
Not much compression used
Compression sometimes used
Usually not a lot of load balancing
Load balancing typically used
Cheaper interfaces
Expensive interfaces
Traffic usually not as sensitive to latency
Traffic is sensitive to latency
list-number
Priority list number assigned to the interface. Any number from 1 to 16.
87200333.book Page 312 Wednesday, August 22, 2001 2:53 PM