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Cisco Wireless LAN Controller Configuration Guide
OL-13826-01
Chapter 7 Controlling Lightweight Access Points
Cisco Aironet 1510 Series Lightweight Outdoor Mesh Access Points
Note In the EMEA regulatory domain, locating neighbors on other channels might take longer given DFS
requirements.
Background Scanning Scenarios
A few scenarios are provided below to better illustrate how background scanning operates.
In Figure 7-18, when the mesh access point (MAP1) initially comes up, it is aware of both root access
points (RAP1 and RAP2) as possible parents. It chooses RAP2 as its parent because the route through
RAP2 is better in terms of hops, SNR, and so on. Once the link is established, background scanning
(once enabled) continuously monitors all channels in search of a more optimal path and parent. RAP2
continues to act as parent for MAP1 and communicate on channel 2 until either the link goes down or a
more optimal path is located on another channel.
Figure 7-18 Mesh Access Point (MAP 1) Selects a Parent
In Figure 7-19, the link between MAP1 and RAP2 is lost. Data from ongoing background scanning
identifies RAP1 and channel 1 as the next best parent and communication path for MAP1 so that link is
established immediately without the need for additional scanning after the link to RAP2 goes down.
RAP1
RAP2
MAP1
Channel 1 = 153
Channel 2 = 161
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