System information

Publication date: Feb., 2012
Revision A1
- 147 -
CLIReferenceGuide
Copyright @ 2012 by Amer Networks
Chapter 36 QoSCommandsofCLI
QoS
Theswitch supportfourQoSqueuesperportwithstrictorweighted fair
queuing scheduling. It supports QoS Control Lists (QCL) for advance
programmable QoS classification, based on IEEE 802.1p, Ethertype, VID,
IPv4/IPv6DSCPandUDP/TCPportsandranges.
HighflexibilityintheclassificationofincomingframestoaQoSclass.
The
QoS classificationlooksfor informationup to Layer 4, including IPv4 and
IPv6DSCP, IPv4TCP/UDPportnumbers,anduserpriorityoftaggedframes.
This QoS classification mechanism is implemented in a QoS control list
(QCL).TheQoSclassassignedtoaframeisusedthroughoutthedevicefor
providing queuing, scheduling, and congestion control guaranteesto the
frameaccordingtowhatwasconfiguredforthatspecificQoSclass.
The switch support  advanced memory control mechanisms providing
excellent performance of all QoS classes under any traffic scenario,
including jumbo  frame. A super priority queue with dedicated memory
and strict highest
 priority in the arbitration. The  ingress super priority
queueallowstrafficrecognizedasCPUtraffictobereceived and queued
for transmission to the CPU even when all the QoS class queues are
congested.

Table 35: QoS Commands
Command Function
delete
Delete QCE
dscp-classification
Configure DSCP ingress classification
dscp-map
Configure DSCP mapping table. This table is used to map
QoS class and DP level based on DSCP value. DSCP value
used to map QoS class and DPL is either translated DSCP
value or incoming frame DSCP value
dscp-remap
Configure DSCP egress remap table. This table is used if
the port egress remarking mode is 'remap' and the
purpose is to map the DSCP and DP level to a new DSCP
value
dscp-translation
Configure global ingress DSCP translation table. If port
DSCP translation is enabled, translation table is used to
translate incoming frame's DSCP value and translated
value is used to ma
p
QoS class and DP level
dscp-trust
Configure trusted DSCP value which is used for QoS
classification. The DSCP value to be checked for trust is
either translated value if DSCP translation is enabled for
the ingress port or incoming frame DSCP value if
translation is disabled for the port. Trusted DSCP value is
onl
y
used for QoS classification
port-classify
QoS ingress port classification
port-dscp
QoS port DSCP configuration
port-policer
Port policer
port-scheduler
QoS egress port schedulers