Avaya Cajun P580, User Manual, Page: 696 / 770

25-36 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0
Chapter 25
CBQ
With the class-based queuing (CBQ) algorithm, you can specify a
maximum bit rate, or bandwidth, for a queue. When that bit rate is
exceeded, the switch drops all packets that exceed the bit rate.
The bit rate that you set should be the long-term average rate of
transmission. Traffic that does not exceed this rate is guaranteed transfer.
For information on how to set up CBQ queueing, see “ Setting Up CBQ ”
later in this chapter.
* Note: Avaya recommends that you do not set a port using CBQ as the
source port or mirror port for a port mirror. When the switch
limits the bandwidth of a port, packets are subject to random
drop. If packets from a source port or mirror port are dropped,
the mirror traffic may not match the source traffic.
CBWFQ
The class-based weighted fair queueing (CBWFQ) algorithm is a
combination of the CBQ and WFQ algorithms. CBWFQ makes more
complex management of traffic possible. Using CBWFQ, you can set:
■
The maximum bit rate.
The bit rate that you set should be the long-term average rate of
transmission. Traffic that does not exceed this rate is guaranteed
transfer.
■
Burst thresholds
■
The action that you want the switch to take when the bit rate exceeds
the maximum bit rate.
—
Drop the packets
Or
—
Forward the packets according to the weight of the queue
* Note: Avaya recommends that you do not set a port using CBWFQ as
the source port or mirror port for a port mirror. When the
switch limits the bandwidth of a port, packets are subject to
random drop. If packets from a source port or mirror port are
dropped, the mirror traffic may not match the source traffic.