Cisco Cisco Aironet 1200 Access Point 릴리즈 노트
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Release Notes for Cisco Aironet Access Points and Bridges for Cisco IOS Release 12.4(10b)JA4
OL-17693-01
Important Notes
Interpreting the Show Controller Dot11Radio Active Power Level Output
A portion of the output of the show controller dot11radio CLI command displays the active power
levels by rate as shown in the example below:
levels by rate as shown in the example below:
1.0 to 11.0 , 20 dBm, changed due to regulatory maximum
6.0 to m15. , 17 dBm, changed due to regulatory maximum
m0.-4 to m15.-4, 14 dBm, changed due to regulatory maximum
The -4 in the third line indicates 40-MHz.
Enabling a Crash File for 1250 Series Access Points
A 1250 series access point that is running a Cisco IOS Release prior to (insert Krypton release number
here) does not generate a crash log when it crashes. The crash log is disabled so that a crash does not
corrupt the flash file system.
here) does not generate a crash log when it crashes. The crash log is disabled so that a crash does not
corrupt the flash file system.
New 1250 series access points shipped from the factory contain a new bootloader image that fixes the
flash file system after it is corrupted during a crash (without losing files). This new bootloader
automatically sets a new CRASH_LOG environment variable to “yes,” which enables a crash log to be
generated following a crash. Therefore, no user configuration is needed to enable a crash log on new
1250 series access points shipped from the factory.
flash file system after it is corrupted during a crash (without losing files). This new bootloader
automatically sets a new CRASH_LOG environment variable to “yes,” which enables a crash log to be
generated following a crash. Therefore, no user configuration is needed to enable a crash log on new
1250 series access points shipped from the factory.
To enable 1250 series access points in the field to generate a crash log following a crash, install Cisco
IOS Release (insert Krypton release number here) or later and enter this case-sensitive bootloader CLI
command on the access point: set CRASH_LOG yes. When you set this CLI, the access point does not
immediately generate a crash log. The log is generated after a crash occurs. After the crash log is
generated, enter this command to disable the CRASH_LOG environment variable to minimize the risk
of corrupting the flash file system: set CRASH_LOG no.
IOS Release (insert Krypton release number here) or later and enter this case-sensitive bootloader CLI
command on the access point: set CRASH_LOG yes. When you set this CLI, the access point does not
immediately generate a crash log. The log is generated after a crash occurs. After the crash log is
generated, enter this command to disable the CRASH_LOG environment variable to minimize the risk
of corrupting the flash file system: set CRASH_LOG no.
Low Throughput Seen on 1250 Series Access Points with 16 BSSIDs Configured
If your network uses 16 BSSIDs with 1- and 2-Mbps data rates, 1250 series access points might
experience very low throughput due to high management traffic.
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.
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.