3Com 4007, Руководство по внедрению, Страница: 582 / 684

582 C
HAPTER
22: Q
O
S
AND
RSVP
Important
Considerations
Review the following considerations before you configure controls:
■
The Multilayer Switching Module predefines controls 1 through 4 for
some of the predefined nonflow classifiers. You can also modify one
of these predefined controls. You cannot remove the default control 1,
but you can modify it. Also you can assign default control 1 only to
classifier 499.
■
You can create controls for classifiers in several ways:
■
Apply one control to only one classifier.
■
Apply one control to multiple classifiers.
■
Assign a rate limit of none to a control and thereby emphasize the
service level and priority tag.
■
Assign a rate limit type of receivePort or aggregate to the control
and define multiple rate-limit values for different subsets of ports.
■
Each classifier can have only one control. Therefore, although you can
apply a control to a classifier that has multiple rate-limit values for
subsets of ports, that control can have only one priority specification
for forwarded frames. To use different priority levels, use multiple
classifiers.
For examples of how controls can be applied to classifiers, see “Examples
of Classifiers and Controls” later in this chapter. For information about
modifying or removing controls, see “Modifying and Removing Classifiers
and Controls” later in this chapter.