Product manual

devolo dLAN 200 AVpro host
16
Configuration
that data packets of a certain type are prioritised using various methods, i.e.
these are given priority in the network over data packets of a lesser type. To
do so, two different methods are provided:
1.6.5 Prioritisation via ToS and VLAN bits (ToS & VLAN
Priorities)
The dLAN standard already recognises four separate, priority levels for
transmitted data packets (ascending priority):
• bulk
• best effort
• video and
• voice
By assigning this information to the corresponding priority values of the IP
packets (ToS) or Ethernet frames (VLAN), the prioritisation can be
implemented during data transmission in the network.
The default settings for transmission prioritisation in the profile are already
optimal for all usual application scenarios, such as triple play services
(Internet, VoIP and IPTV). Therefore, only make changes if you have detailed
knowledge in this field! To apply prioritisation in a network, all existing
network devices (e.g. switches, routers, etc.) must support the corresponding
standard.
According to the current specification, the three ToS bits (Type of Service) in
the header data of a IPv4 data packet are reserved for the priority
description. From the drop-down menus with the eight possible ToS values,
select which dLAN priority level is to be assigned to it.