Cisco Cisco Access Registrar 4.2 Specifikace stáhnout pdf (Strana 137)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 4 Configuring Controller SettingsWireless Device Access

Configuring Client Roaming

The roaming enhancements mentioned above are enabled automatically, with the appropriate CCX

support.

Note AP1030s in REAP mode and hybrid-REAP access points in standalone mode do not support CCX Layer

2 roaming.

Using the GUI to Configure CCX Client Roaming Parameters

Follow these steps to configure CCX client roaming parameters using the GUI.

Step 1 Click Wireless > 802.11a/n (or 802.11b/g/n) > Client Roaming. The 802.11a (or 802.11b) > Client

Roaming page appears (see Figure 4-13).

Figure 4-13 802.11a > Client Roaming Page

Step 2

If you want to fine-tune the RF parameters that affect client roaming, choose Custom from the Mode

drop-down box and go to Step 3. If you want to leave the RF parameters at their default values, choose

Default and go to Step 8.

Note For high-speed client roaming applications in outdoor mesh environments, Cisco recommends

that you set the Transition Time parameter to 1 second.

Step 3 In the Minimum RSSI field, enter a value for the minimum received signal strength indicator (RSSI)

required for the client to associate to an access point. If the client’s average received signal power dips

below this threshold, reliable communication is usually impossible. Therefore, clients must already have

found and roamed to another access point with a stronger signal before the minimum RSSI value is

reached.

Range: –80 to –90 dBm

Default: –85 dBm

Step 4 In the Hysteresis field, enter a value to indicate how much greater the signal strength of a neighboring

access point must be in order for the client to roam to it. This parameter is intended to reduce the amount

of roaming between access points if the client is physically located on or near the border between two

access points.

Range: 2 to 4 dB

Default: 2 dB

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