User`s guide

SET UP
XSRING+ SHDSL switch User’s guide ref 9018809-01 Page 49
16 Quality of service (QoS)
16.1 DiffServ benefits & overview
The goal of Quality of Service algorithms is to guarantee that critical data flows will be transmitted with
lower delay than others.
For instance, it can be difficult to transmit on the same SHDSL network an important video data flow, a
small but critical PLC protocol data flow and digital voice protocols.
To solve that question, the XSRING+ implements the DiffServ algorithm.
Terms definitions
A service is the association of a protocol (TCP, UDP, ICMP, AH, ESP, GRE, IGMP) and a port number; for instance TCP
and port 502.
A device or machine is a range of IP addresses (IP address plus netmask); for instance 192.168.1.0 / 255.255.255.0 .
A traffic is a particular data flow defined by a particular device destination address and a particular service.
Classes :
4 traffic classes are defined : Platinum, Gold, Silver, Bronze,
The Platinum class will be transmitted with the first priority.
A minimum and a maximum bandwidth are assigned to each class.
The bandwidth of the Platinum class is not limited.