Vehicle Mounted Modem (Vmm) Deployment Consideration - Motorola WiNG 5.5 Reference Manual

Refer to the following for more information on the Path Method Root Path Metric screen. These descriptions apply to both
the 2.4 GHz and 5.0/4.9 GHz frequencies.
Channel Width
Priority Meshpoint
Meshpoint Path Minimum
Meshpoint Path Metric
Threshold
Meshpoint Tolerance
Period
Meshpoint Root Sample
Count
Meshpoint Root Off-
channel Duration
Meshpoint Root Channel
Switch Delta
Meshpoint Root Off-
channel Scan Frequency
Meshpoint Root Channel
Hold Time
12. Select OK to save the changes. Select

5.2.12.1 Vehicle Mounted Modem (VMM) Deployment Consideration

Mesh Point Configuration
Before defining a VMM configuration (mounting an AP7161 mesh point on a moving vehicle), refer to the following deployment
guidelines to ensure the configuration is optimally effective:
• Disable layer 2 stateful packet inspection from the firewall policy.
• Set the RTS threshold value to 1 on all mesh devices. The default value is 2347. For more information on defining radio
settings, see Access Point Radio Configuration on page
• Use Opportunistic as the rate selection settings for the AP7161 radio The default is Standard. For more information on
defining this settings, see
Configure the channel width that mesh point automatic channel scan should assign to the
selected radio. The available options are:
• Automatic – Indicates the channel width is calculated automatically. This is the
default value.
• 20 MHz – Indicates the width between two adjacent channels is 20 MHz.
• 40 MHz – Indicates the width between two adjacent channels is 40 MHz.
Configure the mesh point monitored for automatic channel scan. This is the mesh point
given priority over other available mesh points. When configured, a mesh is created with
this mesh point. When not configured, a mesh point is automatically selected.
Configure the minimum path metric value for a mesh connection to be established. Set a
value between 100 - 20,000.
Configure a minimum threshold value for triggering an automatic channel selection for
mesh point selection. Set a value in between 800 - 65535.
Configure the time duration in seconds to wait before triggering a automatic channel
selection for the next hop.
Configure the number of scans performed for data collection before a mesh point root is
selected. Set a value between 1 - 10 scans.
Configure the duration in the range of 20 - 250 milliseconds for the Off Channel Duration
field when scanning for mesh point root. This is the duration the scan dwells on each
channel when performing an off channel scan.
Configure the delta value in dBm in the range 5 - 35 dBm which when crossed triggers a
mesh point root automatic channel selection.
Configure the time duration in seconds between two consecutive Off Channel Scans for
mesh point root. Set a duration between 1 - 60 seconds.
Configure the minimum duration to stay on a selected channel before the channel
conditions are reassessed for a possible channel change for mesh point root. Set a value
between 0 - 1440 minutes. Set this value to 'Zero' (0) to prevent a automatic channel
selection from happening.
Reset to revert to the last saved configuration. Select
Radio Override Configuration on page
5-40.
5-222.
Device Configuration 5 - 159
Exit to close this screen.