Cisco Cisco Access Registrar 4.2 Spezifikationen PDF herunterladen (Seite 93)

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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

Configuring a 4400 Series Controller to Support More Than 48

Access Points

As noted earlier, 4400 series controllers can support up to 48 access points per port. However, you can

configure your 4400 series controller to support more access points using one of the following methods:

• Link aggregation (for controllers in Layer 3 mode), page 3-35

• Multiple AP-manager interfaces (for controllers in Layer 3 mode), page 3-35

• Connecting additional ports (for controllers in Layer 2 mode), page 3-40

Follow the instructions on the page indicated for the method you want to use.

The following factors should help you decide which method to use if your controller is set for Layer 3

operation:

• With link aggregation, all of the controller ports need to connect to the same neighbor switch. If the

neighbor switch goes down, the controller loses connectivity.

• With multiple AP-manager interfaces, you can connect your ports to different neighbor devices. If

one of the neighbor switches goes down, the controller still has connectivity. However, using

multiple AP-manager interfaces presents certain challenges (as discussed in the “Using Multiple

AP-Manager Interfaces” section below) when port redundancy is a concern.

Using Link Aggregation

See the “Enabling Link Aggregation” section on page 3-29 for more information and instructions on

enabling link aggregation.

Note Link aggregation is the only method that can be used for the Cisco WiSM and Catalyst 3750G Integrated

Wireless LAN Controller Switch controllers.

Using Multiple AP-Manager Interfaces

Note This method can be used only with Cisco 4400 series stand-alone controllers.

When you create two or more AP-manager interfaces, each one is mapped to a different port (see

Figure 3-15). The ports should be configured in sequential order such that AP-manager interface 2 is on

port 2, AP-manager interface 3 is on port 3, and AP-manager interface 4 is on port 4.

Note AP-manager interfaces need not be on the same VLAN or IP subnet, and they may or may not be on the

same VLAN or IP subnet as the management interface. However, Cisco recommends that you configure

all AP-manager interfaces on the same VLAN or IP subnet.

Note You must assign an AP-manager interface to each port on the controller.

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