Understand ing TotalWatc h Channe l Visiting

The Active and DOS channelsare visited more frequently than the other channels.The order of preferencein
selecting the next channelis:
1. DOS
2. Active
3. reg-domain
4. All-reg-domain
5. Rare
Oncea channelis s elected,the dwell time fort hat channelis determinedbased o n the channeltype. A t the end of
the dwellt ime, a new channeli s picked.

Understand ing TotalWatc h Age out o f Devices

ArubaOSuses a combinatio no fi nactivity time and unseen time to age out a device. This ensures that the channel
is scanned a sufficient numberof times before a device ages out. AM module maintains the followingparameters:
Discovered Time—The absolute time, in seconds, since the device was discovered.
Monitored Time—The numberof times the channel was scanned since discovery.
Inactivity Time—The numberof times the device was not “seen” when the channelis scanned.
Unseen Time—The absolutet ime, in seconds, since the device was last “seen.”
Administering Tota lWatch
The AM modulewill initi alize thec hannellist for each of the AP’s radio based on the scan mode setting for the
radio. For example,if scan mo de is set to rare, then the channel list will contain all possible channels. You can view
these channelsby using the show ap ar m scan-times command.

Configuring Per R adio Settings

For each radio, you can configure the following settings (for detailed information on commands, refert o the
Dell

PowerConnect W-SeriesArubaOS 6.2 Command Line InterfaceGuide

):
lthe dwellti mesfor the various channel types
lthe channellist that should be used for scanning
These settings are configuredvia t heco mmandrf am-scan-profile, which can be attached to the two profiles,
dot11a-radio-profile and dot11g-radio-profile.
The am-scan-profileincludes the following parameters that can be configured:
rf am-scan-profile <name>
scan-mode [reg-domain | all-reg-domain | rare]
The defaultsetti ngis the all-reg-domain.This is consistent wit ht hedefault functioning of the AM scanning where
the radio scans channels belongingto allregulatory domains.

Configuring Per A P Setting

If the AP is a dual-band single radio AP, an option is available to specify which band should be used for scanningi n
AM-mode.This setting is available in the “ap system-profile”, via the am-scan-rf-bandcommand.
ap system-profile <name>
am-scan-rf-band [a | g | all]
DellPowerConnect W- Series ArubaOS 6.2 | User Guide WirelessIntrusionPr evention | 390