SGS-6341-Series User Manual

23-129
DSCP: Differentiated Services Code Point, classification information carried in Layer 3 IP
packet header, occupying 6 bits, in the range of 0 to 63, and is downward compatible with IP
Precedence.
MPLS TC(EXP)：
A field of the MPLS packet
s means the service class, there are 3 bits, the ranging from 0 to 7.
Internal Priority: The internal priority setting of the switch chip; its valid range relates with the
chip; short for Int-Prio or IntP.
Drop Precedence: When processing the packets, firstly drop the packets with the bigger drop
precedence, the ranging is 0-2 in three color algorithm, the ranging is 0-1 in dual color
algorithm. Short for Drop-Prec or DP.
Classification: The entry action of QoS, classifying packet traffic according to the
classification information carried in the packet and ACLs.
Policing: Ingress action of QoS that lays down the policing policy and manages the classified
packets.
Remark: Ingress action of QoS, perform allowing, degrading or discarding operations to
packets according to the policing policies.
Scheduling: QoS egress action. Configure the weight for eight egress queues WRR
(Weighted Round Robin).
In-Profile: Traffic within the QoS policing policy range (bandwidth or burst value) is called
In-Profile.
Out-of-Profile: Traffic out the QoS policing policy range (bandwidth or burst value) is called
Out-of-Profile.
23.1.2 QoS Implementation
To implement the switch software QoS, a general, mature reference model should be given.
QoS cannot create new bandwidth, but can maximize the adjustment and configuration for the
current bandwidth resource. Fully implemented QoS can achieve complete management over
the network traffic. The following is as accurate as possible a description of QoS.
User’s Manual of SGS-6341 series