Avaya 580 - Manual (Page 716)

25-42 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1
Chapter 25
For information about how CBWFQ works, see “ CBWFQ ” earlier in this
chapter.
* Note: The switch does not drop packets on egress queue 7, even if you
specify the drop keyword. This restriction ensures that traffic
management packets are not discarded by the bandwidth-
limiting functions. In spite of the ability of egress queue 7 to
exceed its bandwidth limit, the queue is subject to a fairness
mechanism that prevents other queues (6 through 0) from being
starved. Note that, when you specify drop, the bandwidth of
queue 7 is limited if lower priority queues require service and
have not reached their bandwidth guarantee.
The maximum size burst that is serviced by
WFQ once the normal burst has been
exceeded. Bursts that are smaller than this
size are serviced by WFQ. Bursts that are
larger than this size are dropped. If you set
this threshold to the same value as normal
burst, the maximum burst capability is
disabled.
The maximum burst can range from the
normal burst size to 15,000.Avaya
recommends a value of 6000.
Increase the maximum burst setting as the
burstiness of the traffic increases.
Note: The maximum burst setting must be
greater than or equal to the normal
burst.
Enter this setting in a multiple of four. If you
do not enter a multiple of four, the switch
rounds down the number that you enter to a
multiple of four. For example, if you enter a
maximum burst size of 43 byes, the switch
converts the setting to 40 bytes.If you enter a
maximum burst size of 0,1,2 or 3, the switch
stores a value of 0 and no data is forwarded
from the queue.
The weight that you want to assign to the
queue. Weights can range from 1to 254.
Table 25-23. Keywords, Arguments, and Options
Keyword, Argument or
Option Definition
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