Dell PowerConnect W-Airwave W-Airwave 7.2 Configuration Guide - Page 105

Dell PowerConnect W's VoIP Call Admission Control CAC prevents any single AP from, Error Rate Wait

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Table 43 Profiles > RF > 802.11a/g Radio > ARM Profile Settings (Continued) Field Default Description VoIP Aware Scan No Power Save Aware Yes Scan Ideal Coverage 10 Index Dell PowerConnect W's VoIP Call Admission Control (CAC) prevents any single AP from becoming congested with voice calls. When you enable CAC, you should also enable this ARM profile setting so the AP will not attempt to scan a different channel if one of its clients has an active VoIP call. This option requires that Scanning is also enabled, as well as a Voice Service/Policy Enforcement Firewall license. If enabled, the AP will not scan a different channel if it has one or more clients and is in power save mode. The Dell PowerConnect W coverage index metric is a weighted calculation based on the RF coverage for all Dell PowerConnect W APs and neighboring APs on a specified channel. The Ideal Coverage Index specifies the ideal coverage that an AP should try to achieve on its channel. The denser the AP deployment, the lower this value should be. The range of possible values is 2 to 20. Acceptable 4 Coverage Index Free Channel Index 25 For multi-band implementations, the Acceptable Coverage Index specifies the minimal coverage an AP it should achieve on its channel. The denser the AP deployment, the lower this value should be. The range of possible values is 1 to 6. The Dell PowerConnect W Interference index metric measures interference for a specified channel and its surrounding channels. This value is calculated and weighted for all APs on those channels (including 3rd-party APs). An AP will only move to a new channel if the new channel has a lower interference index value than the current channel. Free Channel Index specifies the required difference between the two interference index values before the AP moves to the new channel. The lower this value, the more likely it is that the AP will move to the new channel. The range of possible values is 10 to 40. Backoff Time 240 Sets the backoff time in seconds. After an AP changes channel or power settings, it waits for the backoff time interval before it asks for a new channel/power setting. The range of possible values is 120 to 3,600 seconds. Error Rate Threshold 50 Sets the minimum percentage of PHY errors and MAC errors in the channel that will trigger a channel change. Error Rate Wait 30 Time Sets the minimum time in seconds the error rate has to exceed the Error Rate Threshold before it triggers a channel change. Noise Threshold -75 (-dBm) Sets the maximum level of noise in channel that triggers a channel change. The range of possible values is 0 to -2,147,483,647 dBm. Noise Wait Time 120 Sets the minimum time in seconds the noise level has to exceed the Noise Threshold before it triggers a channel change. The range of possible values is 120-3600 seconds. Minimum Scan Time 8 Sets the minimum number of times a channel must be scanned before it is considered for assignment. The supported range for this setting is 0 to 2,147,483,647 scans. Dell PowerConnect W recommends a Minimum Scan Time between 1 to 20 scans. Load Aware Scan Thresholds 1,250,000 Sets the traffic throughput level an AP must reach before it stops scanning. Load aware ARM preserves network resources during periods of high traffic by temporarily halting ARM scanning if the load for the AP gets too high. The supported range for this setting is 0 to 20000000 bytes/second. (Specify 0 to disable this feature.) Mode Aware Arm Scan Mode No all-regdomain Sets mode aware functions on the APs. If enabled, ARM turns APs into Air Monitors (AMs) if it detects higher coverage levels than necessary. This helps avoid higher levels of interference on the WLAN. Although this setting is disabled by default, you may want to enable this feature if your APs are deployed in close proximity (for example, less than 60 feet apart). Set the scanning mode for the radio:  all-reg-domain: Scan channels in all regulatory domain  reg-domain: Scan channels in the APs regulatory domain Dell PowerConnect W AirWave 7.2 | Configuration Guide Dell PowerConnect W Configuration Reference | 105

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Dell PowerConnect W AirWave 7.2
| Configuration Guide
Dell PowerConnect W Configuration Reference
|
105
VoIP Aware Scan
No
Dell PowerConnect W’s VoIP Call Admission Control (CAC) prevents any single AP from
becoming congested with voice calls. When you enable CAC, you should also enable this
ARM profile setting so the AP will not attempt to scan a different channel if one of its clients
has an active VoIP call. This option requires that
Scanning
is also enabled, as well as a Voice
Service/Policy Enforcement Firewall license.
Power Save Aware
Scan
Yes
If enabled, the AP will not scan a different channel if it has one or more clients and is in
power save mode.
Ideal Coverage
Index
10
The Dell PowerConnect W coverage index metric is a weighted calculation based on the RF
coverage for all Dell PowerConnect W APs and neighboring APs on a specified channel. The
Ideal Coverage Index
specifies the ideal coverage that an AP should try to achieve on its
channel. The denser the AP deployment, the lower this value should be. The range of
possible values is 2 to 20.
Acceptable
Coverage Index
4
For multi-band implementations, the
Acceptable Coverage Index
specifies the minimal
coverage an AP it should achieve on its channel. The denser the AP deployment, the lower
this value should be. The range of possible values is 1 to 6.
Free Channel Index
25
The Dell PowerConnect W Interference index metric measures interference for a specified
channel and its surrounding channels. This value is calculated and weighted for all APs on
those channels (including 3rd-party APs). An AP will only move to a new channel if the new
channel has a lower interference index value than the current channel.
Free Channel Index
specifies the required difference between the two interference index
values before the AP moves to the new channel. The lower this value, the more likely it is that
the AP will move to the new channel. The range of possible values is 10 to 40.
Backoff Time
240
Sets the backoff time in seconds. After an AP changes channel or power settings, it waits for
the backoff time interval before it asks for a new channel/power setting. The range of
possible values is 120 to 3,600 seconds.
Error Rate
Threshold
50
Sets the minimum percentage of PHY errors and MAC errors in the channel that will trigger a
channel change.
Error Rate Wait
Time
30
Sets the minimum time in seconds the error rate has to exceed the Error Rate Threshold
before it triggers a channel change.
Noise Threshold
(-dBm)
-75
Sets the maximum level of noise in channel that triggers a channel change. The range of
possible values is 0 to -2,147,483,647 dBm.
Noise Wait Time
120
Sets the minimum time in seconds the noise level has to exceed the Noise Threshold before
it triggers a channel
change. The range of possible values is 120-3600 seconds.
Minimum Scan Time
8
Sets the minimum number of times a channel must be scanned before it is considered for
assignment. The supported range for this setting is 0 to 2,147,483,647 scans. Dell
PowerConnect W recommends a Minimum Scan Time between 1 to 20 scans.
Load Aware Scan
Thresholds
1,250,000
Sets the traffic throughput level an AP must reach before it stops scanning. Load aware ARM
preserves network resources during periods of high traffic by temporarily halting ARM
scanning if the load for the AP gets too high. The supported range for this setting is 0 to
20000000 bytes/second. (Specify 0 to disable this feature.)
Mode Aware Arm
No
Sets mode aware functions on the APs. If enabled, ARM turns APs into Air Monitors (AMs) if
it detects higher coverage levels than necessary. This helps avoid higher levels of
interference on the WLAN. Although this setting is disabled by default, you may want to
enable this feature if your APs are deployed in close proximity (for example, less than 60 feet
apart).
Scan Mode
all-reg-
domain
Set the scanning mode for the radio:
all-reg-domain: Scan channels in all regulatory domain
reg-domain: Scan channels in the APs regulatory domain
Table 43
Profiles > RF > 802.11a/g Radio > ARM Profile Settings
(Continued)
Field
Default
Description