Onfiguring Uality Of Ervices - 3Com 3CBLSG48 User Manual

13
C
ONFIGURING
S
ERVICE
Quality of Service (QoS) provides the ability to implement QoS and
priority queuing within a network. For example, certain types of traffic
that require minimal delay, such as Voice, Video, and real-time traffic
can be assigned a high priority queue, while other traffic can be
assigned a lower priority queue. The result is an improved traffic flow
for traffic with high demand. QoS is defined by:
Classification — Specifies which packet fields are matched to
specific values. All packets matching the user-defined specifications
are classified together.
Action — Defines traffic management where packets are
forwarded are based on packet information, and packet field values
such as VLAN Priority Tag (VPT) and DiffServ Code Point (DSCP).
VPT Classification Information — VLAN Priority Tags (VPT)
are used to classify packets by mapping packets to one of the
egress queues. VPT to Queue assignments are user-definable.
Packets arriving untagged are assigned a default VPT value, which is
set on a per-port basis. The assigned VPT is used to map the packet
to the egress queue.
This section contains information for configuring QoS, and includes the
following topics:
Viewing CoS Settings
Defining CoS
Defining Queuing Algorithm
Viewing CoS to Queue
Defining CoS to Queue
Viewing DSCP to CoS
Configuring DSCP to CoS
Configuring Trust Settings
Viewing Bandwidth Settings
Defining Bandwidth Settings
Defining Voice VLAN
Q
UALITY OF