Chapter 20: Quality of Service (QoS) Commands

 

 

the traffic. However, no unused tokens will

 

accumulate in the bucket. If the traffic

 

increases, the excess traffic will be discarded

 

since no tokens are available for handling the

 

increase.

 

If the traffic is below the maximum

 

bandwidth, unused tokens will accumulate in

 

the bucket since the actual bandwidth falls

 

below the specified maximum. The unused

 

tokens will be available for handling excess

 

traffic should the traffic exceed the maximum

 

bandwidth. Should an increase in traffic

 

continue to the point where all the unused

 

tokens are used up, packets will be discarded.

 

Unused tokens accumulate in the bucket

 

until the bucket reaches maximum capacity,

 

set by this parameter. Once the maximum

 

capacity of the bucket is reached, no extra

 

tokens are added. The range is 4 to 512 Kbps.

 

This parameter must be used with the

 

MAXBANDWIDTH parameter. Specifying a

 

token bucket size without also specifying a

 

maximum bandwidth serves no function.

priority

Specifies the priority value in the IEEE 802.1p

 

tag control field that traffic belonging to this

 

traffic class is assigned. Priority values range

 

from 0 to 7 with 0 being the lowest priority

 

and 7 being the highest priority. Incoming

 

frames are mapped into one of four Class of

 

Service (CoS) queues based on the priority

 

value.

 

If you want the packets to retain the new

 

value when they exit the switch, use the

 

REMARKPRIORITY parameter.

 

A new priority can be set at both the flow group

 

and traffic class levels. If it is set in both places,

 

the value in the flow group overrides the value in

 

the traffic class.

remarkpriority

Replaces the user priority value in the packets

 

with the new value specified with the PRIORITY

 

parameter. This parameter is ignored if the

 

PRIORITY parameter is omitted or set to NONE.

 

Options are:

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