Cisco Cisco Access Registrar 4.2 Especificaciones descargar pdf (Pagina 123)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 4 Configuring Controller SettingsWireless Device Access

Configuring Aggressive Load Balancing

Step 3 To create a new SNMP v3 user, enter this command:

config snmp v3user create username {ro | rw} {none | hmacmd5 | hmacsha} {none | des | aescfb128}

auth_key encrypt_key

where

• username is the SNMP v3 username;

• ro is read-only mode and rw is read-write mode;

• none, hmacmd5, and hmacsha are the authentication protocol options;

• none, des, and aescfb128 are the privacy protocol options;

• auth_key is the authentication shared secret key; and

• encrypt_key is the encryption shared secret key.

Do not enter “default” for the username, auth_key, and encrypt_key parameters.

Step 4 To save your changes, enter save config.

Step 5 To reboot the controller so that the SNMP v3 user that you added takes effect, enter reset system.

Configuring Aggressive Load Balancing

Enabling aggressive load balancing on the controller allows lightweight access points to load balance

wireless clients across access points in an LWAPP system. You can enable aggressive load balancing

using the controller GUI or CLI.

When a wireless client attempts to associate to a lightweight access point, association response packets

are sent to the client with an 802.11 response packet including status code 17. This code indicates that

the access point is too busy to accept any more associations. The client then attempts to associate to a

different access point. For example, if load balancing is enabled and the client count is configured as 5

clients, when a sixth client tries to associate to the access point, the client receives an 802.11 response

packet with status code 17, indicating that the access point is busy.

Note When you use Cisco 7921 and 7920 Wireless IP Phones with controllers, make sure that aggressive load

balancing is disabled for each controller. Otherwise, the initial roam attempt by the phone may fail,

causing a disruption in the audio path.

Using the GUI to Configure Aggressive Load Balancing

Follow these steps to configure aggressive load balancing using the GUI.

Step 1 Click Controller > General to open the General page.

Step 2 From the Aggressive Load Balancing drop-down box, choose either Enabled or Disabled to configure

this feature.

Step 3 Click Apply to commit your changes.

Step 4 Click Save Configuration to save your changes.

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