Saturday, November 14, 2009


By default, a RAP AP uses channel 161

Background scanning on 1510s operates on the 802.11a link, for 1505s it operates on the 802.11b/g link.
config mesh background-scanning enable/disable
show mesh background-scanning

Parent AP is chosen by using the adjusted ease. This is the ease of each neighbor divided by the number of hops to the RAP.
     Parents are given a 20% of bonus ease to reduce link flapping.

Routing Around an Interface (RAI)

config mesh secondary-backhaul enable

For this to work properly, all APs beyond the first hop to the one that is being used on the first hop must be on the same channel. RRM does not work with RAI

config mesh secondary-backhaul enable force same-secondary channel

This forces the whole subtree rooted at one hop MAPs to have the same secondary channel. Ignore RRM or manually assigned for MAPs at two hops and deeper.

Design constraints:

Recommended backhaul is 18Mbps
Number of backhaul hops – limit to 3 or 4
Number of MAPs/RAP – suggested limit of 20/1

Multiple RAPs for hardware diversity – deploy on same channel as primary RAP.
32 MAPs/RAP limit should be remembered.

Map density & distance
If building out a mesh to backhaul data - 1000 Ft RADIUS
Providing complete client coverage – 600 Ft RADIUS

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