Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho

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Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 8      Cisco Wireless Mesh Networking
  Increasing Mesh Availability
Figure 8-17
Two RAPs per Cell on Different Channels
Multiple RAPs
Before deploying multiple RAPs, the purpose for deploying these RAPs needs to be considered. If 
additional RAPs are being considered to provide hardware diversity, they should be deployed on the 
same channel as the primary RAP. The reason for this is to minimize the convergence time in a scenario 
where the mesh transfers from one RAP to another. When planning RAP hardware diversity, the 32 
MAPs per RAP limitation should be remembered.
If the additional RAPs are being deployed primarily to provide additional capacity, the additional RAPs 
should be deployed on a different channel from its neighboring RAPs to minimize the interference on 
the backhaul channels.
When adding a second RAP on a different channel, channel planning or RAP cell splitting can be used 
to reduce the extent of potential collision domains. Channel planning allocates different non-overlapping 
channels to RAPs in the same collision domain to minimize the collision probability. RAP cell splitting 
is a simple, yet effective, way to reduce the collision domain. Instead of deploying one RAP with 
omni-directional antennas in a mesh network, two or more RAPs with directional antennas can be 
deployed. These RAPs are collocated but operate on different frequency channels, thus dividing a large 
collision domain into several smaller ones that operate independently.
If the Wireless Mesh bridging features are being used with multiple RAPs, these RAPs should all be on 
the same subnet to ensure that a consistent subnet is provided for bridge clients.
RAP
RAP
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