CHAPTER 4: SYSTEM ADMINISTRATION
SYSTEM ADMINISTRATION
MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
4–91
4.7
QoS Tasks
Quality of Service (QoS) enables you to assign priorities to specified traffic streams so that
the more important streams can be assured faster delivery in comparison to the less
important streams. You can assign up to four priority levels based on DiffServ code points,
802.1p markings, Ethernet port ID, or source or destination IP address.
For a complete discussion of QoS see
Section 6.1: Quality of Service
.
The following subsections describe the tasks that you can perform using the screens of the
QoS branch.
4.7.0.1 DiffServ
This screen is used to define DiffServ Code Points (DSCPs) and assign each code point to a
priority queue. The priority mapping applies to all IP packets transmitted by the system
(regardless of whether they were generated by Multinet4, routed, or bridged. If a packet is
received that has a DSCP marking that is not defined in this table the packet is treated as if
its marking is Best Effort.The table is pre-configured with two undeletable profiles (one for
Best Effort and one for Expedited per-hop behavior).
Diffserv supplies QoS at layer 3 by using the IP type of service (TOS) header field.
FIGURE 4–55: QoS: DiffServ
The table below describes the parameters that can be viewed and edited in the QoS:
DiffServ screen.