Siemens EF 711 Series Guia do Utilizador descarregar pdf (Página 317)

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Configuring Classes of Service

Priority and ToS/DSCP Marking

SCALANCE WLC711

User Guide, V8.11, 07/2012, C79000-G8976-C260-03 8-5

3. If still no CoS found, use the default CoS of the WLAN (for non-auth policy).

For inbound traffic, classification is done at the AP (if AP Filtering is enabled), otherwise it is done

at the controller. For outbound traffic, classification is always done at the controller.

The Rule that assigns authorization (Access Control) may not be the same rule that assigns CoS.

Therefore, up to two passes are made through the filter rules for each packet. If the first pass

results in the packet being allowed a second pass will take place to classify the packet for CoS.

• The first pass looks for authorization (allow, deny)

• The second pass classifies and assigns the CoS.

The number of rules reported to Policy Manager are limited to the number of rules allowed on the

controller. On the controller, a single rule can contain different classification types whereas for

Policy Manger this rule may be split into several rules. For example, if a rule defines an IP source

address and also a ToS value, then this rule would be split into an IP type and a ToS type. Rules

exceeding the limit after splitting will be dropped.

Priority and ToS/DSCP Marking

After packets are classified, they are assigned a final User Priority (UP) value. The Priority and

ToS/DSCP Marking bits to be applied to the packet is taken from the CoS and if not set, the

received value (ToS/DSCP) is used. ToS/DSCP Marking rewrites the Layer 3 Type of Service (ToS)

byte.

Configuring ToS/DSCP Marking

To Configure ToS/DSCP Marking:

1. From the Class of Service General tab, click ToS/DSCP Marking.

2. Click the Select button. The ToS/DSCP Configuration dialog displays:

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