User's Manual

Understanding TotalWatch Age out of Devices
ArubaOS uses a combination of inactivity time and unseen time to age out a device. This ensures that the
channel is scanned a sufficient number of times before a device ages out. AM module maintains the following
parameters:
Discovered Time—The absolute time, in seconds, since the device was discovered.
Monitored Time—The number of times the channel was scanned since discovery.
Inactivity Time—The number of times the device was not “seen” when the channel is scanned.
Unseen Time—The absolute time, in seconds, since the device was last “seen.”
Administering TotalWatch
The AM module will initialize the channel list for each of the AP’s radio based on the scan mode setting for the
radio. For example, if scan mode is set to rare, then the channel list will contain all possible channels. You can
view these channels by using the show ap arm scan-times command.
Configuring Per Radio Settings
For each radio, you can configure the following settings (for detailed information on commands, refer to the
Dell Networking W-Series ArubaOS 6.4.x Command Line Reference Guide):
l the dwell times for the various channel types
l the channel list that should be used for scanning
These settings are configured via the command rfam-scan-profile, which can be attached to the two profiles,
dot11a-radio-profile and dot11g-radio-profile.
The am-scan-profile includes the following parameters that can be configured:
rf am-scan-profile <name>
scan-mode [reg-domain | all-reg-domain | rare]
The default setting is the all-reg-domain. This is consistent with the default functioning of the AM scanning
where the radio scans channels belonging to all regulatory domains.
Configuring Per AP Setting
If the AP is a dual-band single radio AP, an option is available to specify which band should be used for scanning
in AM-mode. This setting is available in the “ap system-profile”, via the am-scan-rf-band command.
ap system-profile <name>
am-scan-rf-band [a | g | all]
The default value is “all”, which is consistent with the prior behavior. This setting is ignored in the case of a dual
radio AP.
There are four parameters that will control the age out of devices in the AM module.
ids general-profile <name>
ap-inactivity-timeout
sta-inactivity-timeout
ap-max-unseen-timeout
sta-max-unseen-timeout
The inactivity timeout is the number of times the device was not “seen” when the channel was scanned. The
unseen timeout is the time, in seconds, since the device was last “seen.”
The show ap monitor scan-info/channel commands provide details of the channel types, dwell times, and
the channel visit sequence.
(host) # show ap monitor scan-info ap-name rb-121
Dell Networking W-Series ArubaOS 6.4.x | User Guide Wireless Intrusion Prevention | 482