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Chapter 8 HomePlug AV
PLA450 User’s Guide
92
For example, your ISP (A) may use VLAN priority settings to identify and prioritize VoIP
(Voice over IP) traffic or you may have a VoIP device (B) attached to your PLA450 which
adds ToS (Type of Service) priorities to data it sends. By giving high priority to VoIP traffic in
your powerline network, VoIP traffic flows more smoothly.
Figure 49 Prioritized Traffic Between Your Home Powerline Network and the Internet
The following mappings are suggestions only. VLAN and ToS priority settings may not map
exactly to Homeplug AV priority settings. Priority settings for VLAN Tags and ToS bits range
from 0 to 7 with 7 as the highest.
8.4.3 QoS Based on Traffic Type
You can prioritize traffic on your powerline network based on four kinds of traffic types.
These are IGMP, IGMP managed Multicast Stream, Unicast and Multicast/Broadcast.
However, it is recommended that you do not change the default settings.
Unicast and Multicast/Broadcast refer to how IP packets are transmitted. Unicast
transmission is from one sender to one recipient. Broadcast transmission is from one sender to
all devices on a network. Multicast transmission is from one sender to some of the devices on
the network.
Table 26 Suggested Mappings
VLAN/TOS PRIORITY
SETTINGS
HOMEPLUG AV
PRIORITY SETTINGS
5~7 Highest
4 High
2~3 Mid
0~1 Low
Internet
A
B