User manual

68D-Link DSL-500B User Manual
Web Conguration
Mark
TPID
(0x8100)
Priority
(3bit)
CFI
(1bit)
VLAN ID
(12bit)
For example: Mark the frame of 802.1p that queued to Queue 9 on
value 2.
After proper modications, click Save/Apply to show the following
interface.
QoS-802.1p Setting
The IEEE 802.1p priority marking method is a standard for prioritizing network trafc at the data link/Mac sub-layer
802.1p trafc is simply classied and sent to the destination, with no bandwidth reservations established.
The follow diagram shows the structure of 802.1Q Frame. The 802.1Q header includes a 3-bit prioritization eld,
which allows packets to be grouped to be grouped into eight levels of priority (0-7), where level 7 is the highest one.
In addition, DSL maps these eight levels to priority queues, where queue 1 has the highest priority.
Layer 2 802.Q Frame
Preamble SFD DA SA Mark
(4 word)
Len/Etype
(2 word)
DATA FCS