Profiles > Ssid > Edca Station - Dell PowerConnect W-Airwave Configuration Manual

Table 50 Aruba Configuration > Profiles > SSID > EDCA Profile Settings (Continued)
Field
ACM
3. Click
Profiles > SSID > EDCA Station
Wireless Multimedia (WMM) provides media access prioritization through Enhanced Distributed Channel
Access (EDCA). EDCA defines four access categories (ACs) to prioritize traffic: voice, video, best effort,
and background. These ACs correspond to 802.1d priority tags, as shown in
Table 51 WMM Access Categories and 802.1d Tags
WMM Access Category
Voice
Video
Best Effort
Background
While the WMM ACs designate specific types of traffic, you can determine the priority of the ACs. For
example, you can choose to give video traffic the highest priority. With WMM, applications assign data
packets to an AC. In the client, the data packets are then added to one of the transmit queues for voice,
video, best effort, or background.
WMM is an extension to the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol's
Distributed Coordination Function (DCF). The collision resolution algorithm responsible for traffic
prioritization depends on the following configurable parameters for each AC:
arbitrary inter-frame space number (AIFSN)
minimum and maximum contention window (CW) size
For each AC, the backoff time is the sum of the AIFSN and a random value between 0 and the CW value. The
AC with the lowest backoff time is granted the opportunity to transmit (TXOP). Frames with the highest
priority AC are more likely to get TXOP as they tend to have the lowest backoff times (a result of having
smaller AIFSN and CW parameter values). The value of the CW varies through time as the CW doubles after
each collision up to the maximum CW. The CW is reset to the minimum value after successful transmission.
In addition, you can configure the TXOP duration for each AC. On the controller, you configure the AC
priorities in the WLAN EDCA parameters profile. There are two sets of EDCA profiles you can configure:
AP parameters affect traffic from the AP to the client
STA parameters affect traffic from the client to the AP
Perform these steps to create or edit
1. Click
cluster profiles.
2. Click the
profile. The
134 | Aruba Configuration Reference
Default
No
Add Save
or . The added or edited profile appears on the
Profiles > SSID > EDCA Station
Add
button to create a new
Details
page appears. Complete the settings as described in
Description
Define whether or not admission control mandatory (ACM) is to be
supported on APs configured with this EDCA profile.
Description
Highest priority
Prioritize video traffic above other data traffic
Traffic from legacy devices or traffic from applications or
devices that do not support QoS
Low priority traffic (file downloads, print jobs)
Event Station
profiles.
Aruba Navigation
in the
EDCA Station
profile
AirWave Wireless Management Suite | Configuration Guide
Profiles > SSID > EDCA AP
Table 49.
pane. This page summarizes the current
, pencil
or click the icon to edit an existing
Table 30:
page.
802.1d Tag
7, 6
5, 4
0, 3
2, 1