Nortel 2000, Инструкция по использованию

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Chapter 4 Policy-enabled networks 287
Using the Business Policy Switch 2000 Version 1.2
When the power is turned on, ports are assigned to the default interface group
(role combination), which is named allBPSIfcs. So, if you install a filter without
creating or specifying another interface group, that filter will, by default, be
installed in the default interface group, which applies to all ports.
Metering or traffic policing overview
QoS traffic policing, which operates at ingress, provides different levels of service
to data streams through user-configurable parameters. A meter is used to measure
the traffic stream against a traffic profile, which you create. Thus, creating meters
yields In-Profile and Out-of-Profile traffic.
Using meters, you set a Committed Rate in Kb/s (1000 bits per second in each
Kb/s). All traffic within this Committed Rate is In-Profile. Additionally, you set a
Maximum Burst Rate that specifies an allowed data burst larger than the
Committed Rate for a brief period. After you set the Maximum Burst Rate, the
system helps you choose the Duration for this burst. Combined, these parameters
define the In-Profile traffic.
An example of traffic policing is limiting traffic entering a port to a specified
bandwidth, such as 25 Kb/s (Committed Rate). Instead of dropping all traffic that
exceeds this threshold, you can configure a Maximum Burst Rate to exceed the
threshold (Committed Rate), for a brief period of time (Duration), without being
dropped.
Note:
You must remove all ports from an interface group in order to
delete it.You cannot delete an interface group that is referenced by a
policy.
Note:
Burst rate and duration are used to determine burst size.