Interlogix NS2503-24P/2C User Manual Manual de usuario descargar pdf (Pagina 130)

NS2503-24P/2C User Manual

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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

Address

Source

Address

VLAN TAG

Ethernet

Type

Data FCS

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

Figure 4-15-1: 802.1p Tag Priority

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 4-15-2 appears.

Figure 4-15-2: QoS Configuration – 802.1Priority Interface Screenshot

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Interlogix NS2503-24P/2C User Manual Manual de usuario Pagina 130