Allied Telesis Switch AT-S79 Manual do Utilizador descarregar pdf (Página 212)

Chapter 20: Quality of Service (QoS)

212 Section II: Using the Web Browser Interface

Configuring CoS

As explained in “QoS Overview” on page 96, a packet received on a port

is placed it into one of four priority queues on the egress port according to

the switch’s mapping of 802.1p priority levels to egress priority queues.

The default mappings are shown in Table 2 on page 97.

You can override the mappings at the port level by assigning a new default

egress queue to a port. Note that this assignment is made 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 stored in egress

queue 3 of the egress port, regardless of the priority levels that might be in

the frames themselves, as found in tagged frames.

Note

The switch does not alter the original priority level in tagged frames.

Frames 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 Advanced Config menu, select QoS Config and then select

Port Priority.

The Port Priority Configuration page is shown in Figure 62.

Figure 62. Port Priority Configuration Page

1 2 ... 207 208 209 210 211 212 213 214 215 216 217 ... 241 242

Sem comentários

Allied Telesis Switch AT-S79 Manual do Utilizador Página 212