RF Plan

RF Plan
Module Overview
• Pre-installation activities
Prepare Floor Plan Drawings
Configure AP/AM modeling parameters
Place APs/AMs
• Post-installation activies
• Dynamic heat maps
• AP monitoring
• Location tracking
RF Plan
• Use RF Plan as an initial tool to place APs
• RF Plan makes many assumptions and does
not factor in building construction materials
(walls, doors, furniture, etc.)
• Works well for typical office environments
Pre-installation Activities
• You will:
• Create floor plan files to display floor layouts
• RF Plan will:
• Provide number of APs/AMs you will need for each
• Derive recommended location for APs/AMs on the
floor plans
RF Plan
• Required information for RF Plan:
Building (drawing) dimensions
Protocol (802.11a/g)
AP type
Desired data rate
Desired monitoring rate for Air Monitors
Floor maps in JPEG format
Building RF Plan JPEG
Top View
1st Floor
175 Feet
2nd Floor
220 Feet
300 Feet
Side View
2nd Floor
1st Floor
350 Feet
Placing Floors on Canvas
1st Floor
2nd Floor
Ensure JPEG Canvas:
1) Encompasses all floors
2) Is larger than the building
350 Feet
Maintain relative position of floors
1st Floor
2nd Floor
Importing Floor Plans
Step 1 – Edit floor plan in a graphics editor
Step 3 – Scale pixels
per feet (or meters)
against known
Step 2 – Move mouse to bottom right of image to measure picture (not Bldg)
width and height in pixels
Sizing Floor Plans
Step 4 – Save floor
image File as JPG
Step 5 – Calculate image dimensions:
• Calculating pixels per feet (or
meters) against a known dimension
• Use that value to calculate
dimensions of JPG image width and
length in feet or meters
Imaging Best Practices
• Make sure the image is scaled
• Images must be in JPEG format
• Maximum 2048x2048 pixels
• Leave a border around the image
• Help triangulate Wi-Fi devices outside the building
• Multi-floor buildings must have a common
anchor point (elevator shafts, etc.)
• The larger the dimension used for scaling, the
more accurate
RF Plan Availability
• Included as a Tabbed Utility in AOS
• Available as a Windows application from support.arubanetworks.com
Note the windows version is used for only pre-installation planning and not for post
deployment heatmap displays, etc.
Results from Windows version may be imported to the Mobility Controller RF Plan
Create Campus
List of existing Campuses
Select New Campus
Enter Campus Name
RF Plan
• Check the Campus, then click New
RF Plan
• Click Building Dimension
RF Plan
• Set building (drawing) dimensions
2nd Floor
1st Floor
Coverage vs. Capacity
• Site surveys traditionally attempt to minimize the
number of APs
• Complete coverage is crucial but also
• Per user throughput
• Overlap for self-healing
• Roaming performance
RF Plan
• Which bands to support?
• Which APs will be used?
AP Calculation Best Practices
• Coverage is typically based on WLAN transmit rate
• Desired speed rate defines estimated minimum connect speed
• The higher the rate, the smaller the coverage area, more APs required
• Capacity-based coverage is recommended for high capacity
conference or training rooms
• Custom coverage is for deployments where the AP count is already
• 100% (Low) – best for open spaces – warehouses, etc.
• 150% (Medium) – best for office spaces
• 200% (High) – offers twice the minimum APs, high
redundancy/performance and dense deployments
• Custom – allows specific overlap. Many office spaces work well
with 120% overlap
RF Plan
• Decide on AM coverage rates
RF Plan - Floor plans
Open Floor Editor
Specify level
(sequence number)
and optionally
modify floor name
Browse to
image and click
RF Plan - Floor plans
Specify a zoom factor
to enlarge image
Initialize RF Plan
Perform initial placement
APs initially
listed in
“Suggested AP”
block, unless
Refine AP Placement
optimizes AP
Can also
manually “drag
and drop” AP
to desired
Modify AP Name (optional)
Double-click AP
to open editor
• Use AP names that
help identify and locate
the APs
• Prior to deployment,
you may define
channel and power
settings to override
auto settings
• Use note section for
RF Plan - AM Placement
RF Plan - Don’t Care
RF Plan - Don’t Deploy
AP Planning (continued)
Optimize AP locations
• Drag and drop APs as
needed (conference
rooms, hallways, etc)
• Avoid metal and nonRF friendly obstacles
• New APs can be
manually added if
Save Plan Information
Review and save the RF Plan
• Verify the building information, AP and AM count and coverage
• Save the building info
Exporting Plans
• Export RF Plan
• Used to back up and
move RF Plan info at
campus or building
• Export/Import
between controllers
or between offline
version and
• Click on include
images if any images
are present
• Use Fully Qualified Location Name (FQLN)
to associate APs and AMs to a location
• FQLN Format:
• Used to map AP to Campus, Building,
Floor in RF Plan
• AP Name and AP Group still used for
assigning profiles
Setting FQLN
Select building and Mapper
Assign FQLN
Dropdown options appear only after
Campus, Building and Floor have been created
Setting FQLN reboots APs
• NOTE: you do not have to use the FQLN
mapper if you simply set the AP Name in
the the AP Installation menu to be the
same as the AP Name in RF Plan. The
system will automatically configure the
FQLN when the AP boots
RF Plan
Post-installation Activities
• Review dynamic heat maps and validate
• Track location of WLAN devices such as clients,
Interfering and Rogue APs
Dynamic Heat Maps
Heat Map
• Near real-time view of
RF coverage and
• Information reported
by APs and AMs
• Helps identify
coverage holes and
After “AP 320” Deployment
Only one b/g
device, so no
heat map
to display
Note “AP 320”
moved from
to “Deployed”
Location Tracking (continued)
Two Web UI options to locate APs and clients
1. Monitor
Viewing client/AP info and clicking on “Locate”
2. RF Plan
Performing a search for a specific client wireless
Location Tracking: Monitor
Click to
At least three
devices must be on
the same channel to
triangulate a device
(AP or AM)
Location Tracking: Monitor (continued)
• Click Locate to show
either contour shapes
(shown here) and/or
• “Keep data for” should
be set to maximum of
10 minutes for best
• The more APs/AMs on
same channel as the
device the better the
result will be
Location Tracking: MAC
Copy client MAC address or AP BSSID from Web
UI screen or from CLI
Use RF Plan directly to locate the device
Select building
Launch Location Services
Location Tracking: MAC (continued)
Click “Add Device”
Enter MAC
address to
Adaptive Radio Management
• Adaptive Radio Management is a realtime dynamic calibration mechanism.
• Purpose:
• To learn and implement optimal channel plan
• To learn and implement optimal power level
How ARM Works
1. APs constantly scan other channels during dead
2. AP analyzes BSSIDs and interference seen on current
and other channels
3. AP reports back to switch when a better channel is
• “Better” is defined as “least number of APs seen on a
channel” or “better SNR statistics”
4. Switch analyzes reports from APs and makes
calculations based on known WLAN topology database
5. If switch finds no conflicts, it will instruct AP to move to
the new channel
6. Dampening factor prevents channel “flapping”
Power Level Adjustment
• Aruba radio power levels are adjustable
between 0 and 4
• 4 is highest
• Calibration will automatically set the
power level to avoid interference with
other APs
• Power levels will be dynamically adjusted
to fill in holes if an AP fails
Channel Selection
• APs operate most efficiently when they are the
only AP on the channel
• Calibration will automatically assign channels to
each AP to minimize interference
• Only channels approved by the appropriate
country regulations will be assigned
• For example, in North America this is
• 802.11b/g = 1, 6, and 11
• 802.11a = 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165
Before Calibration
•All .11a radios
on channel 36
•All .11g radios
on channel 1
•All power levels
at 50%
After Calibration
•Network learns
optimal channel
plan to avoid
•Learns optimal
power levels to
avoid coverage
ARM Settings
ARM Assignment Options
• Disabled
• Disables ARM calibration and reverts APs back to
default channel and power settings
• Single Band
• Enables the APs to change channels, in same band,
and transmit power
• Multi Band
• Not supported (for future use)
• Maintain
• Causes APs to hold last used channel and power
settings. Useful for customers concerned with APs
changing channel/power during use.
ARM Options
• ARM Scanning
• Enable ARM Scanning
• ARM Client Aware
• Prevents AP from changing channel if clients are associated.
• ARM Rogue AP Aware
• If no other APs are on the same channel as the Rogue or no AM
are available the AP can change channel to contain a Rogue.
An AP can always contain a rogue on the same channel.
• ARM VoIP Aware
• Pauses ARM Scanning when a VoIP call is detected (SIP,
• ARM Multi Band Scan
• Allows APs to scan across bands for Rogue detection.
A Quick Note on Air Monitors
• When ARM is enabled, AP’s will sample
other channels to search for IDS policy
violations (Rogue AP’s, etc).
• Air Monitors offer the capability to perform
Advanced IDS scanning as well as IDS
Policy enforcement and remote packet
capture on any channel.
Lab 2
RF Plan
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