Allied Telesis AT-S63 - Manual (Page 240)

Chapter 14: Class of Service
240 Section II: Advanced Operations
Configuring CoS
A packet received on a port is placed it into one of eight priority queues on
the egress port according to the switch’s mapping of 802.1p priority levels
to egress priority queues. You can override the mappings at the port level
by assigning the packets a temporary priority level. Note that this
assignment is made when a packet is received on the ingress port and
before the frame is forwarded to the egress port. Consequently, you need
to configure this feature on the ingress port.
For example, you can configure a switch port so that all ingress frames are
assigned a temporary priority level of 5, regardless of the actual priority
levels that might be in the frames themselves, as found in tagged frames.
A temporary priority level applies only while a frame traverses the
switching matrix. Tagged frames, which can contain a priority level, leave
the switch with the same priority level they had when they entered the
switch.
To configure CoS for a port, perform the following procedure:
1. From the Main Menu, type 7 to select Security and Services.
2. From the Security and Services menu, type 5 to select Class of
Service (CoS).
The Class of Service (CoS) menu is shown in Figure 83.
Figure 83. Class of Service (CoS) Menu
The “Number of CoS Queues” line indicates the number of egress
queues on each port. The AT-9400 Switch has eight queues per port.
This value cannot be changed.
Allied Telesis AT-9424T/SP - AT-S63
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Class of Service (CoS)
Number of CoS Queues: 8
1 - Configure Port CoS Priorities
2 - Map CoS Priority to Egress Queue
3 - Configure Egress Scheduling
4 - Show Port CoS Priorities
R - Return to Previous Menu
Enter your selection?