Cisco Cisco Access Registrar 4.2 Especificaciones descargar pdf (Pagina 94)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 3 Configuring Ports and Interfaces

Configuring a 4400 Series Controller to Support More Than 48 Access Points

Before an access point joins a controller, it sends out a discovery request. From the discovery response

that it receives, the access point can tell the number of AP-manager interfaces on the controller and the

number of access points on each AP-manager interface. The access point generally joins the AP-manager

with the least number of access points. In this way, the access point load is dynamically distributed

across the multiple AP-manager interfaces.

Note Access points may not be distributed completely evenly across all of the AP-manager interfaces, but a

certain level of load balancing occurs.

Figure 3-15 Two AP-Manager Interfaces

Before implementing multiple AP-manager interfaces, you should consider how they would impact your

controller’s port redundancy.

Examples:

1. The 4402-50 controller supports a maximum of 50 access points and has two ports. To support the

maximum number of access points, you would need to create two AP-manager interfaces (see

Figure 3-15) because a controller can support only 48 access points on one port.

2. The 4404-100 controller supports up to 100 access points and has four ports. To support the

maximum number of access points, you would need to create three (or more) AP-manager interfaces

(see Figure 3-16). If the port of one of the AP-manager interfaces fails, the controller clears the

access points’ state, and the access points must reboot to reestablish communication with the

controller using the normal controller join process. The controller no longer includes the failed

AP-manager interface in the LWAPP discovery responses. The access points then rejoin the

controller and are load-balanced among the available AP-manager interfaces.

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