Qos Configuration - Planet FGSD-1022P User Manual

4.9.2 QoS Configuration

QoS settings allow customization of packet priority in order to facilitate delivery of data traffic that might be affected by
latency problems. When CoS / 802.1p Tag Priority is applied, the Switch recognizes 802.1Q VLAN tag packets and extracts
the VLAN tagged packets with User Priority value.
802.1Q Tag and 802.1p priority
Destination
Preamble
Address
6 bytes
Set up the COS priority level. With the drop-down selection item of Priority Type above being selected as COS only/COS
first, this control item will then be available to set the queuing policy for each port.
4.9.2.1 Priority Queue Service settings
QoS settings allow customization of packet priority in order to facilitate delivery of data traffic that might be affected by
latency problems. The IEEE 802.1p Priority specification uses 8 priority levels to classify data packets. In 802.1p compliant
devices, a tag inserted into the packet header is used to identify the priority level of data packets.
The Switch supports Static Port Ingress priority and four queues. The screen in
User Priority
3 bits
TPID (Tag Protocol
Identifier)
2 bytes 2 bytes
Source
VLAN TAG
Address
6 bytes 4 bytes
Figure 4-9-1: 802.1p Tag Priority
Figure 4-9-2: QoS Configuration – 802.1Priority
User's Manual of FGSD-1022 Series
CFI VLAN ID (VID)
1 bits 12 bits
TCI (Tag Control
Information)
Ethernet
Data
Type
2 bytes 46-1517 bytes
Figure 4-9-2 appears.
119
FCS
4 bytes