Cisco Aironet 1040 Series User Manual download pdf (Page 9)

Release Notes for Cisco Aironet Access Points and Bridges for Cisco IOS Release 15.2(2)JA

OL-23990-01

Important Notes

Low Throughput Seen on 1260 Series Access Points with 16 BSSIDs Configured

If your network uses 16 BSSIDs with 1- and 2-Mbps data rates, 1260 series access points might

experience very low throughput due to high management traffic.

802.11n HT Rates Apply Only to No Encryption or WPA2/AES Encryption

The 802.11n HT rates apply only to no encryption or WPA2/AES encryption. They do not apply to WEP

or WPA encryption. If WEP or TKIP encryption is used, the 1250 series access points and any 802.11n

Draft 2.0 clients will not transmit at the HT rates. Legacy rates (802.11a/b/g) will be used for any clients

using WEP or TKIP encryption.

Layer 3 Not Supported with NAC for MBSSID

Layer 3 is not supported with NAC for MBSSID in this release.

Change to Default IP Address Behavior

Cisco IOS Releases 12.3(2)JA and later change the default behavior of access points requesting an IP

address from a DHCP server:

When you connect a 1040, 1130, 1140, 1240, 1250, or 1260 series access point or a 1300 series outdoor

access point/bridge with a default configuration to a LAN, the access point requests an IP address from

a DHCP server and, if it does not receive an address, continues to send requests indefinitely.

Changes to the Default Configuration—Radios Disabled and No Default SSID

In this release, the radio or radios are disabled by default, and there is no default SSID. You must create

an SSID and enable the radio or radios before the access point allows wireless associations from other

devices. These changes to the default configuration improve the security of newly installed access

points.

Clients Using WPA/WPA2 and Power Save May Fail to Authenticate

Certain clients using WPA/WPA2 key management and power save can take many attempts to

authenticate or, in some cases, fail to authenticate. Any SSID defined to use authentication

key-management WPA, coupled with clients using power save mode and authenticating using

WPA/WPA2 can experience this problem.

A hidden configure level command, dot11 wpa handshake timeout, can be used to increase the timeout

between sending the WPA key packets from the default value (100 ms) to a value between 101 and 2000

ms. The command stores its value in the configuration across device reloads.

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Cisco Aironet 1040 Series User Manual Page 9