Priority Control Function - Fujitsu PRIMEQUEST 480 System Design Manual

5.2.5

Priority control function

This function performs priority processing of traffic.
Class of Service (CoS) is information stored in a field in the VLAN tag of a MAC
frame. CoS is standardized by a standard, and indicates the priority of frames.
Based on this value, priority can be controlled as shown in
frame does not have a VLAN tag, the priority complies with the default priority of a
receive port. The priority can be changed.
Output
C122-B001-02EN
PRIMEQUEST
Web server Application server
Partition#0 Partition#1
SW
Priority
High
B1 B1 B1 B1
Sent prior
to other.
B2 B2
B3 B3 B3 B3
B1 B1 B2 B2
B4 B4 B4 B4
Low
Figure 5.6 Priority control function
DB server
Partition#2
B B
GSWB GSWB
B B
Packets are allocated
to each queue.
B1 B1 B3 B3
Input
5.2 Main GSWB Functions
Figure 5.6. If a receive
Server for development
Partition#3
The priority information is
stored in a field in a VLAN tag.
B B
Breakdown (example) of packets
that transit through B.
Priority
B1 B1 Application 1
High
Application 2
B2 B2
B3 B3 Application 3
B4 B4 Application 4
Low
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