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ROAM-Guide
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Helps your clients to search for a better AP and to have a nice roaming experience.
The roaming guide runs as a cronjob every minute on your ap and verifies that clients
have an acceptable TQ towards the AP. If that isn't the case it will deauth the client
by stating that the AP is full, enabling the client to look for an alternative AP.
This is happening in three definable stages depending on the TQ of the client.
When a client has decided to come back after the ban-time it will not be bothered
again unless it depletes to the next TQ level or it has been kicked $stage times.
For every stage the client is guided, the ban time will be increased. So by default
the first stage has a bantime of 500ms, the second 2775ms and the third 10000ms.
When a client is away for some definable time or is below the first stages TQ,
it will be forgotten, and the guiding will be re-enable.
Configuration
-------------
In '/etc/config/roamguide' the following default configuration is available,
to activate it you need to set enabled to '1'.
config roamguide
option device "client0" # wireless AP device we like to guide
list signal '-60' # first penality level, in dBm
list signal '-77' # second penality level, in dBm
list signal '-85' # final penality level. in dBm
option bantime_base '500' # on the first level ban for 500ms
option bantime_factor '2375' # on the second one for 2775ms,
# and in the final 10000ms
option forget_time '600' # Forget about a client after 10s
option enabled '0' # set to '1' to enable this profile
This module creates a cronjob calling /usr/bin/roamguide once a minute.
If you want to make roamguide more reactive (but also stress your device) you can add some more cron jobs with sleep timers in /usr/lib/micron.d/root:
* * * * * sleep 20 & /usr/bin/roamguide
* * * * * sleep 40 & /usr/bin/roamguide
### Configure your node with ssh calls
Disable roamguide:
ssh <router> 'uci set roamguide.@roamguide[0].enabled="0"; uci commit roamguide && echo done'
Make roamguide more reactive:
ssh <router> 'grep -q "sleep 20" /usr/lib/micron.d/roamguide || echo -e "\n* * * * * sleep 20 & /usr/bin/roamguide" >> /usr/lib/micron.d/roamguide'
ssh <router> 'grep -q "sleep 40" /usr/lib/micron.d/roamguide || echo "* * * * * sleep 40 & /usr/bin/roamguide" >> /usr/lib/micron.d/roamguide'
Configure different boundaries:
ssh <router> 'uci set roamguide.@roamguide[0].signal='-60'; uci add_list roamguide.@roamguide[0].signal='-70'; uci add_list roamguide.@roamguide[0].signal='-80'; uci commit roamguide && echo done'
### Testing tools
This will show you the stats, where you are connected to on your client:
watch -d -n0,5 iw dev $(ip -o -4 route show to default | awk '{print $5}') station dump
About
See https://github.com/sargon/gluon-sargon/tree/master/roamguide
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