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

Table 48 Aruba Configuration > Profiles > EDCA AP Profile Settings (Continued)
Field
BC/MC Rate
Optimization
Strict Spectra-
link Voice
Protocol (SVP)
3. Click
Profiles > SSID > EDCA AP
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 49 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 EDCA AP profiles.
AirWave Wireless Management Suite | Configuration Guide
Default Description
No Enables or disables scanning of all active stations currently associated to a mesh
point to select the lowest transmission rate based on the slowest connected mesh
child. When enabled, this setting dynamically adjusts the multicast rate to that of the
slowest connected mesh child. Multicast frames are not sent if there are no mesh
children.
NOTE: Aruba recommends using the default value.
No Use this setting for Spectralink VoIP devices. This setting automatically permits and
prioritizes the Spectralink Voice Protocol (SVP).
Add Save
or . The added or edited profile appears on the
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)
Profiles > SSID
page.
Table 49.
Aruba Configuration Reference |
802.1d Tag
7, 6
5, 4
0, 3
2, 1
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