Configuring TotalWatch

Aruba 802.11n 802.11n is a wireless networking standard to improve network throughput over the two previous standards, 802.11a and 802.11g. With 802.11n, there will be a significant increase in the maximum raw data rate from 54 Mbps to 600 Mbps with the use of four spatial streams at a channel width of 40 MHz. APs and non-11n APs in AM Air Monitor. AM is a mode of operation supported on wireless APs. When an AP operates in the Air Monitor mode, it enhances the wireless networks by collecting statistics, monitoring traffic, detecting intrusions, enforcing security policies, balancing wireless traffic load, self-healing coverage gaps, and more. However, clients cannot connect to APs operating in the AM mode.-mode support for TotalWatch is the ability to scan all channels of the RF Radio Frequency. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals. spectrum, including 2.4-and 5 GHz Gigahertz. bands Band refers to a specified range of frequencies of electromagnetic radiation. as well as the 4.9 GHz Gigahertz. public safety band Band refers to a specified range of frequencies of electromagnetic radiation.. TotalWatch also provides 5 MHz Megahertz granular channel scanning of bands Band refers to a specified range of frequencies of electromagnetic radiation. for rogue devices and dynamic scanning dwell times to focus on those channels with traffic. TotalWatch provides an advanced set of features to detect unauthorized wireless devices and a set of customized rules are used to highlight devices that truly pose a threat to the network.

 

TotalWatch is supported on APs deployed in the AM Air Monitor. AM is a mode of operation supported on wireless APs. When an AP operates in the Air Monitor mode, it enhances the wireless networks by collecting statistics, monitoring traffic, detecting intrusions, enforcing security policies, balancing wireless traffic load, self-healing coverage gaps, and more. However, clients cannot connect to APs operating in the AM mode.-mode only.

TotalWatch provides monitoring support for the entire WLAN Wireless Local Area Network. WLAN is a 802.11 standards-based LAN that the users access through a wireless connection. spectrum. Aruba APs in the AM Air Monitor. AM is a mode of operation supported on wireless APs. When an AP operates in the Air Monitor mode, it enhances the wireless networks by collecting statistics, monitoring traffic, detecting intrusions, enforcing security policies, balancing wireless traffic load, self-healing coverage gaps, and more. However, clients cannot connect to APs operating in the AM mode.-mode can monitor the following frequencies:

Aruba APs in AM Air Monitor. AM is a mode of operation supported on wireless APs. When an AP operates in the Air Monitor mode, it enhances the wireless networks by collecting statistics, monitoring traffic, detecting intrusions, enforcing security policies, balancing wireless traffic load, self-healing coverage gaps, and more. However, clients cannot connect to APs operating in the AM mode.-mode can scan the following additional frequencies:

If the AP is HT High Throughput. IEEE 802.11n is an HT WLAN standard that aims to achieve physical data rates of close to 600 Mbps on the 2.4 GHz and 5 GHz bands.-capable, these frequencies are scanned in the 40 MHz Megahertz mode.

This section includes the following topics:

Understanding TotalWatch Channel Types and Qualifiers

Based on the regulatory characteristics, channels are categorized into the following types:

  • Reg-domain Channels : A channel that belongs to the regulatory domain of the country in which the AP is deployed. The set of channels that belong to this group is a subset of the channels in the all-reg-domain channel group.
  • All-reg-domain Channels : A valid non-overlapping channel that is in the regulatory domain of at least one country. The channels in this category belong in the frequency ranges of:
  • Rare Channel : Channels that fall into a frequency range outside of the regulatory domain; 2484 MHz Megahertz and 4900 MHz Megahertz-4995 MHz Megahertz (J-channels), and 5000-5100 MHz Megahertz. The channels in this group do not belong to any other group.

Each of these channel types can have an associated qualifier:

Understanding TotalWatch Monitoring Features

TotalWatch enables monitoring of all channels including regulatory domain and rare channels. You can select one of the following scanning modes for each radio AP:

  • scan only the channels that belong to the AP’s regulatory domain
  • scan channels that belong to all regulatory domains
  • scan all channels

Understanding TotalWatch Scanning Spectrum Features

TotalWatch scans the following frequencies.

Table 1 list the frequency-to-channel mapping used by TotalWatch.

Table 1: Frequency to Channel Mapping

Frequency

Channel

2412 – 2472 MHz Megahertz (in increments of 5 MHz Megahertz)

1 - 13

2484 MHz Megahertz

14

5100 – 5895 MHz Megahertz (in increments of 5 MHz Megahertz)

20 - 179

4900 – 4995 MHz Megahertz (in increments of 5 MHz Megahertz)

180 - 199

5000 – 5100 MHz Megahertz

200 - 219

Understanding TotalWatch Channel Dwell Time

When an AP (in am-mode) visits a channel, the amount of time the AP stays on that channel is known as the dwell time. The channel dwell time is a variable value based on the following channel types.

  • dwell-time-active-channel: For channels where there is wireless activity. Default setting is 500 ms.
  • dwell-time-reg-domain channel: For channels that belong to the AP’s regulatory domain group (reg-domain) with no wireless activity. The default setting is 250 ms.
  • dwell-time-other-reg-domain-channel: For channels that belong to the all regulatory domain group (all-reg-domain) with no wireless activity The default setting is 250 ms.
  • dwell-time-rare-channel: For channels in the rare group where no wireless activity is detected. The default value is 100 ms.

Use the rf am-scan-profile command to set the dwell time and scan mode.

Understanding TotalWatch Channel Visiting

The Active and DOS channels are visited more frequently than the other channels. The order of preference in selecting the next channel is:

  1. DOS
  2. Active
  3. reg-domain
  4. All-reg-domain
  5. Rare

Once a channel is selected, the dwell time for that channel is determined based on the channel type. At the end of the dwell time, a new channel is picked.

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 Air Monitor. AM is a mode of operation supported on wireless APs. When an AP operates in the Air Monitor mode, it enhances the wireless networks by collecting statistics, monitoring traffic, detecting intrusions, enforcing security policies, balancing wireless traffic load, self-healing coverage gaps, and more. However, clients cannot connect to APs operating in the AM mode. 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.