Руководство По Проектированию для Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter
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Enterprise Mobility 4.1 Design Guide
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Chapter 8 Cisco Wireless Mesh Networking
Increasing Mesh Availability
If you build your mesh with multiple RAPs on different subnets, MAP convergence times can increase
in the event of a fail over as the MAP has to failover to another RAP on a different subnet and DHCP for
an appropriate IP address. One way to limit this from happening is to use different BGN for segments in
your network that are separated by subnet boundaries. In segmenting in this manner, MAPs do not
associate with a RAP on a different subnet and you avoid slow convergence issues and the expense of
the higher availability offered by the additional RAPs.
in the event of a fail over as the MAP has to failover to another RAP on a different subnet and DHCP for
an appropriate IP address. One way to limit this from happening is to use different BGN for segments in
your network that are separated by subnet boundaries. In segmenting in this manner, MAPs do not
associate with a RAP on a different subnet and you avoid slow convergence issues and the expense of
the higher availability offered by the additional RAPs.
Multiple Controllers
There are operational advantages to centralizing WLCs and these advantages need to be traded off
against the speed and capacity of the links to the LWAPP APs and the traffic profile of the WLAN clients
using these APs.
against the speed and capacity of the links to the LWAPP APs and the traffic profile of the WLAN clients
using these APs.
If the WLAN client traffic is expected to be focused on particular sites such as the Internet or a data
center, centralizing the controllers at the same sites as these traffic focal points gives the operational
advantages without sacrificing traffic efficiency (see
center, centralizing the controllers at the same sites as these traffic focal points gives the operational
advantages without sacrificing traffic efficiency (see
)
Figure 8-18
Centralized Controllers
If the WLAN client traffic is predominantly peer-to-peer, a distributed controller model as shown in
may be a better fit. In such cases, it may be that a majority of the WLAN traffic are clients
in the area, with a smaller amount of traffic going to other locations. Given that many peer-to-peer
applications can be sensitive to delay and packet loss, it is best to ensure that traffic between peers takes
the most efficient path.
applications can be sensitive to delay and packet loss, it is best to ensure that traffic between peers takes
the most efficient path.
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