GE 82-POE QoS Configuration, 802.1Q Tag and 802.1p priority, Priority Queue Service settings

Chapter 4: Web-Based Management

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

User Priority

CFI

VLAN ID (VID)

3 bits 1 bits 12 bits

TPID (Tag Protocol

Identifier)

TCI (Tag Control

Information)

		2 bytes	2 bytes
Preamble	Destination	Source	VLAN TAG
	Address	Address

Ethernet

Type

Data

FCS

6 bytes 6 bytes 4 bytes 2 bytes 46-1517 bytes 4 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.

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 Figure 79 appears.

GE-DS-82 and 82-PoE Ethernet Managed Switch User Manual 111