ProSoft Technology RLX2-IHW-E User Manual page 84

RLX2-IHx Series ♦ 802.11a, b, g, n
Industrial Hotspots
In applications where the mobile platform is traveling a known path, it is necessary to
have an unambiguous option when it reaches a roam point. If multiple Parent radios are
in range at the roam point, the radio may choose to roam to the wrong Parent radio.
The Repeater radio uses the R
every roam. Due to topology variances, there may be one or two coverage areas that
would operate better with different settings for these roam parameters.
The following settings allow for Parent Assisted roaming by advertising these parameter
values to any Child Repeater radio that associates to this unit. You can enable each
parameter separately. Only enabled parameters are advertised to Child Repeater radios.
Description
Parameter
When checked this disables Fast Transition (FT) roaming in this unit and FT capability is
Disable FT
not advertised in this unit's beacons.
Note: With FT disabled, the roam duration could double and roams are no longer
'hitless' as there may be some frame loss in the Parent-to-Child direction.
FT should be enabled other than a few exceptional circumstances. For example, if a 3rd
party client device will not associate to this unit because FT is enabled, or if the RSSI to
the Parent is so low at a roam point that FT frames are lost during the roam.
When a Repeater's Parent Link is broken due to Sync Loss or if the initial connection
Disable
fails for any reason a Blackout time is set to a Parent candidate so that the Parent
Blackout
selection algorithm will be forced to try another Parent even if its inferior. This works well
when there are always other decent Parent candidates available. In some applications
the physical setup is such that all other candidates in some locations are so weak, that
any connection to them will be unusable. When it is known that there might only be one
valid Parent candidate at times, this control when checked in the Repeater will allow the
Parent selection algorithm to ignore any Blackout time that's been set to a Parent and
allow an immediate reconnection attempt and prevent a lengthy connection outage. This
control is disabled when in Master mode.
Select this box to negate all other parameters so that no roam parameters are advertised
None
to Child Repeater radios.
Select this box to advertise the unit that a Child Repeater radio should roam to next. The
Next Parent
select box automatically populates with all the RLX2-IHx series units with the same SSID
that are on the same Ethernet network as a unit.
Each entry is represented by the Name of the RLX2-IHx series radio, so it is important
that you give each radio a unique name. If the desired next Parent radio has not been
detected because it is not currently powered up or attached to the network, it does not
appear in the list. In this case, you can manually enter its MAC Address into the
parameter. Once saved, this MAC Address appears in the select box until that unit is
detected on the Ethernet, at which time the radio's name replaces the MAC Address.
When an advertised N
Child Repeater radio roams to the Next Parent radio when the Next Parent radio's cost is
lower than its current Parent radio. When the advertised Next Parent radio is on a
different channel, the radio uses the R
Select this box to advertise the R
Roam
Roam Threshold overrides the Child Repeater radio's equivalent setting, only when the
Threshold
Child Repeater radio is associated to this unit. If the Parent radio is not advertising a
Roam Threshold, the Child Repeater radio reverts to using its own value configured on
the P
This parameter is critical when a Next Parent is also being advertised and that Parent is
configured to be on a different channel than this unit. The Child Repeater uses this
threshold to determine when to switch to the Next Parent's channel and associate with it.
You must ensure that at a point where the current Parent's RSSI goes below the
threshold, the Next Parent is in range. Otherwise, the roam fails.
ProSoft Technology, Inc.
T
OAM HRESHOLD
P
EXT ARENT
L tab for the Child Repeater radio.
ARENT INK
Configuring a Radio - Detailed Configuration
and P M
ARENT
radio is on the same channel as the current unit, the
T to make the roam decision.
OAM HRESHOLD
T that a Child Repeater radio uses. This
OAM HRESHOLD
parameters for
ARGIN
Page 84 of 248
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