Solved: Re: Question on settings

westmanm · ‎06-09-2003

Over the weekend I tweeked a bunch of BR350 radios to improve their links. Two of the settings that I found myself playing with were beacon period and bridge spacing. Can you tell me what these two settings do? A high beacon period seems to allow for longer links, is there a down side to using it?

Thanks

Mike

vblavet · ‎06-10-2003

Mike,

Beacons are send to allow clients to associate to AP/BR and to roam from an AP/BR to an other. Having a lower beacon period will allow a client to quicker detect a better AP. Changing this in a fixed bridge environment will not change a lot of things.

Bridge spacing will adapt protocol timers in order to support multiple kilometers spaced bridges. 802.11 protocol support specific timers, when having root and non-root bridges separated by more than 1 km you need to give the distance in order to have a better auto-tuning of protocol timers (ack, retries, ...).

There is an other parameter that might be interesting to configure in a fixed environment. This is the timeout of disassociation when a client (the non-root bridge) does not send data to the AP (the root). Putting this parameter to 0 (in root BR radio hardware setting) will keep the non-root associated even if no traffic is seen.

Hope this helps,

Vincent

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vblavet · ‎06-10-2003

Mike,

Beacons are send to allow clients to associate to AP/BR and to roam from an AP/BR to an other. Having a lower beacon period will allow a client to quicker detect a better AP. Changing this in a fixed bridge environment will not change a lot of things.

Bridge spacing will adapt protocol timers in order to support multiple kilometers spaced bridges. 802.11 protocol support specific timers, when having root and non-root bridges separated by more than 1 km you need to give the distance in order to have a better auto-tuning of protocol timers (ack, retries, ...).

There is an other parameter that might be interesting to configure in a fixed environment. This is the timeout of disassociation when a client (the non-root bridge) does not send data to the AP (the root). Putting this parameter to 0 (in root BR radio hardware setting) will keep the non-root associated even if no traffic is seen.

Hope this helps,

Vincent

westmanm · ‎06-11-2003

Great info. Thanks

e.frias · ‎06-18-2003

Hi Vincent,

Where are configured these settings (timeouts, etc). The acks timeout should be changed to increase the distance or there any other parameters in adittion to.

Thanks!