Dell PowerConnect W-Airwave W-Airwave 7.2 Configuration Guide - Page 120

Table 52 Profiles > SSID > EDCA Station Profile Settings (Continued) Field Default Description Transmission Opportunity 94 Slots in 32 uSec Units ACM No 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. Define whether or not admission control mandatory (ACM) is to be supported on APs configured with this EDCA profile. Voice Arbitrary Inter-frame 2 Space Number Minimum Contention 2 Window (Exponent) Maximum Contention 3 Window (Exponent) 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 Transmission Opportunity 47 Slots in 32 uSec Units 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. ACM No Define whether or not admission control mandatory (ACM) is to be supported on APs configured with this EDCA profile. 3. Select Add or Save. The added or edited profile appears on the Profiles > SSID > EDCA Station page. Profiles > SSID > HT SSID High-throughput (HT) APs support additional settings not available in legacy APs. A mesh high-throughput SSID profile can enable or disable high-throughput (802.11n) features and 40 MHz channel usage, and define values for aggregated MAC protocol data units (MDPUs) and Modulation and Coding Scheme (MCS) ranges. Dell PowerConnect W provides a "default" version of the mesh high-throughput SSID profile. You can use the "default" version or create a new instance of a profile which you can then edit as you need. High-throughput Mesh nodes operating in different cluster profiles can share the same high-throughput SSID radio profile. The mesh high-throughput SSID profile defines settings unique to 802.11n-capable, high-throughput APs. If none of the APs in your mesh deployment are 802.11n-capable APs, you do not need to configure a high-throughput SSID profile. If you modify a currently provisioned and running high-throughput SSID profile, your changes take affect immediately. You do not reboot the controller or the AP. Perform these steps to create or edit HT SSID profiles. 1. Select Profiles > SSID > HT SSID in the Dell PowerConnect W Navigation pane. This page summarizes the current cluster profiles. 2. Select the Add button to create a new HT SSID profile, or click the pencil icon to edit an existing profile. The Details page appears. Complete the settings as described in Table 28: 120 | Dell PowerConnect W Configuration Reference Dell PowerConnect W AirWave 7.2 | Configuration Guide