ViaSat MEOLink User Manual page 37

MEOLink User Manual
3.2.5.6 QoS
3.2.5.6.1 802.1 Q Overview
The 802.1 Q protocol is used to configure virtual LANS and to provide better service to
selected traffic. The 4‐byte header has a 2‐byte protocol identifier (TPID) and 2‐byte tag
control information (TCI). The TCI contains three elements: three‐bit user priority, one‐bit
canonical format indicator (CFI), and 12‐bit VLAN identifier (VID).
3.2.5.6.2 Queue Monitoring/Configuration and Class of Service
Queue monitoring applies an algorithm to adjust for temporary congestion and/or to apply
prioritization based on a Class of Service (CoS) traffic designation. The mechanisms used
include storing excess traffic in buffers and establishing queues based on the CoS. The Traffic
Types—with their respective CoS designators—are listed below:
Field
Pause Frame Properties
Rev 002vx
1141780,

Background (CoS 1) [Lowest Priority]

Spare (CoS 2)

Best Effort (CoS 0)

Excellent Effort (CoS 3)

Controlled Load (CoS 4)

Video (CoS 5)

Voice (CoS 6)

Network Control (CoS 7) [Highest Priority]
Figure 32: QoS Configuration Screen
Table 9: QoS Configuration Parameters
Definition/Configuration
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