Siemens EF 711 Series Betriebsanweisung PDF herunterladen (Seite 234)

Configuring WLAN Services

Configuring the QoS Policy

SCALANCE WLC711

6-38 C79000-G8976-C260-03, 07/2012, User Guide, V8.11

Configuring the Priority Override

Priority override allows you to define and force the traffic to a desired priority level. Priority

override can be used with any combination, as displayed in Table 6-11. You can configure the

service class and the DSCP values.

When Priority Override is enabled, the configured service class overrides the queue selection in

the downlink and uplink direction, the 802.1P UP for the VLAN tagged Ethernet packets, and the

UP for the wireless QoS packets (WMM or 802.11e) according to the mapping in Table 6-10. If

Priority Override is enabled and the VNS is not locally bridged, the configured DSCP value is

used to tag the IP header of the encapsulated packets. The AP does not override the DSCP in the

IP header of the user packet.

QoS Modes

You can enable the following QoS modes for a WLAN Service:

• Legacy — If enabled, the AP will classify and prioritize the downlink traffic for all clients

according to the same rules.

• WMM — If enabled, the AP will accept WMM client associations, and will classify and

prioritize the downlink traffic for all WMM clients. WMM clients will also classify and

prioritize the uplink traffic.

• 802.11e — If enabled, the AP will accept WMM client associations, and will classify and

prioritize the downlink traffic for all 802.11e clients. The 802.11e clients will also classify and

prioritize the uplink traffic.

• Turbo Voice — If any of the above QoS modes are enabled, the Turbo Voice mode is available.

If enabled, all the downlink traffic that is classified to the Voice (VO) AC and belongs to that

VNS is transmitted by the AP via a queue called Turbo Voice (TVO) instead of the normal

Voice (VO) queue. The TVO queue is tailored in terms of contention parameters and number

of retries to maximize voice quality and voice capacity.

The APs are capable of supporting 5 queues. The queues are implemented per radio. For example,

5 queues per radio. The queues are:

Silver 3 3 BE BE

Bronze 2 0 BE BE

Best Effort 1 2 BK BK

Background 0 1 BK BK

Table 6-11 Relationship Between Service Class and 802.1D UP (continued)

SC name SC Value 802.1d UP AC Queue

Table 6-12 Queues

Queue Name Purpose

AC_VO Voice

AC_VI Video

AC_BK Background

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Siemens EF 711 Series Betriebsanweisung Seite 234