Table Of Contents
Release Notes for Cisco Aironet
1200 Series Access Points
October 11, 2002
These release notes describe features and caveats for Cisco Aironet 1200 Series Access Points running firmware version 11.56. This release note also contains important information about the device.
Cisco Aironet Access Points are wireless LAN transceivers that can act as the connection point between wireless and wired networks or as the center point of a standalone wireless network. In large installations, the roaming functionality provided by multiple access points enables wireless users to move freely throughout the facility while maintaining uninterrupted access to the network.
Your 1200 series access point can contain two radios: a 2.4-GHz radio in an internal mini-PCI slot and a 5-GHz radio module in an external, modified cardbus slot. The access point supports one radio of each type, but it does not support two 2.4-GHz or two 5-GHz radios. You can configure the radios separately, using different settings on each radio.
The access point uses a browser-based management system, but you can also configure the access point using a terminal emulator, a Telnet session, or Simple Network Management Protocol (SNMP).
Firmware version 11.56 is a maintenance release and does not contain new features.
You can find the latest release of access point firmware at this URL:
Installation in Environmental Air Space
Cisco Aironet 1200 Series Access Points are suitable for use in environmental air space in accordance with Section 300-22(c) of the National Electrical Code.
Note If you plan to mount the access point in an area subject to environmental air space with the intention of upgrading to a 5-GHz radio, Cisco recommends that you mount the access point horizontally so that its antennas point down. Doing so ensures that the access point complies with regulatory requirements for environmental air space after the 5-GHz radio is installed.
Caution The Cisco Aironet Power Injector has a smaller operating temperature range (32 to 104 oF; 0 to 40 oC) than the 1200 series access point. The power injector is not intended for use in extremely high or low temperatures or in environmental air spaces, such as above suspended ceilings.
For instructions on the proper installation and grounding of external antennas, refer to the National Fire Protection Association's NFPA 70, National Electrical Code, Article 810, and the Canadian Standards Association's Canadian Electrical Code, Section 54.
Warning Do not install the antenna near overhead power lines or other electric light or power circuits, or where it can come into contact with such circuits. When installing the antenna, take extreme care not to come into contact with such circuits, as they may cause serious injury or death.
This section describes issues you should consider before applying power to the access point.
Caution The nominal voltage for 1200 series access points is 48 VDC, and the access point is operational up to 60 VDC. Voltage higher than 60 VDC can damage the equipment.
Caution Cisco Aironet Power Injectors are designed for use with 1200 series access points only. Do not use the power injector with any other Ethernet-ready device. Using the power injector with other Ethernet-ready devices can damage the equipment.
Use Only One Power Option
You cannot provide redundant power to the access point with both DC power to its power port and inline power from a patch panel or powered switch to the access point's Ethernet port. If you apply power to the access point from both sources, the switch or power patch panel might shut down the port to which the access point is connected. Figure 1 shows the power configuration that can shut down the port on the patch panel or powered switch.
Figure 1 Improper Power Configuration Using Two Power Sources
Operating 5-GHz Radio Requires Power Injector or Power Module
Only the 1200 series power injector and the 1200 series power module can support operation of the 5-GHz radio in the access point. Currently, switches with inline power and power patch panels do not provide enough power for operation of the 5-GHz radio.
Access Point Requires 1200 Series Universal Power Supply and Power Injector
You must use a 1200 series universal power supply to power the access point. If you need to use a power injector to inject power into the access point's Ethernet port, you must use a 1200 series power injector. The 350 series universal power supply and power injector are not compatible with the 1200 series access point.
You must have a 1200 series access point to install firmware version 11.56.
Your access point must be running firmware version 11.40T or later to install firmware version 11.56.
Upgrading to a New Firmware Release
Determining the Firmware Version
The firmware version number is in the upper-left corner of most management screens in the web-browser interface and at the top of the home (Summary Status) page in the command-line interface.
For instructions on installing access point firmware:
1. Follow this link to the Cisco Aironet documentation home page:
2. Follow this path to the product, document, and chapter:
Aironet 1200 Series Wireless LAN Products > Cisco Aironet 1200 Series Access Points >
Cisco Aironet 1200 Series Access Point Software Configuration Guide > Managing Firmware and Configurations > Updating Firmware
3. Follow this link to the Software Center on Cisco.com and select the Cisco Aironet 1200 Series link to download firmware version 11.56:
Note To upgrade firmware from a file server, you must enter settings on the access point's FTP Server Setup page. Refer to the "Updating from a File Server" section on page 6-5 in the Cisco Aironet 1200 Series Access Point Software Configuration Guide for more information.
Limitations and Restrictions
This section describes limitations and restrictions for 1200 series access points.
Removing Power During Firmware Update Can Corrupt Radio Firmware
When you update the firmware on an access point, allow the unit to finish its start-up sequence before removing power. If you update the firmware and remove power before the unit finishes the start-up sequence, the radio firmware might be corrupted, making the unit inoperable. If the radio firmware is corrupted, the radio indicator (the bottom of the three indicators on top of the access point) is red continuously, and the following error message appears when the access point starts up:
The access point should recover from this error automatically.
You can safely remove power after a firmware update when the configuration management pages reappear in the command-line or web-browser interfaces, or when the three status indicators on top of the unit complete the following pattern:
1. All three indicators are continuously green, meaning that the access point is beginning to update the firmware.
2. The middle indicator is continuously green and the top and bottom indicators are off, indicating that the access point is updating the radio firmware.
When the middle indicator blinks or the top and bottom indicators blink, you can remove power.
EAP Authentication Requires Matching 802.1x Protocol Drafts
Note This section applies to wireless networks set up to use LEAP. If you do not use LEAP on your wireless network, you can skip this section.
Wireless client devices use Extensible Authentication Protocol (EAP) to log onto a network and generate a dynamic, client-specific WEP key for the current logon session. If your wireless network uses WEP without EAP, client devices use the static WEP keys entered in the Aironet Client Utilities.
If you use Network-EAP authentication on your wireless network, your client devices and access points must use the same 802.1x protocol draft. For example, if the radio firmware on the client devices that will associate with an access point is 4.16, the access point should be configured to use Draft 8 of the 802.1x protocol. Table 1 lists firmware versions for Cisco Aironet products and the draft with which they comply.
Table 1 802.1x Protocol Drafts and Compliant Client Firmware
Firmware Version Draft 7 Draft 8 Draft 10 1
PC/PCI cards 4.13
PC/PCI cards 4.16
PC/PCI cards 4.23
PC/PCI cards 4.25 and later
WGB34x/352 8.61 and later
AP34x/35x 11.05 and earlier
AP34x/35x 11.06 and later2
AP34x/35x 11.07 and later
AP12xx 11.40T and later
1 The functionality in Draft 10 is equivalent to the functionality in Draft 11, the ratified draft of the 802.1x standard.
2 The default draft setting in access point firmware version 11.06 and later is Draft 10.
Use the Authenticator Configuration page to select the draft of the 802.1x protocol the access point should use. Follow these steps to set the draft for your access point:
Step 1 Browse to the Authenticator Configuration page in the access point management system:
a. On the Summary Status page, click Setup.
b. On the Setup page, click Security.
c. On the Security Setup page, click Authentication Server.
Step 2 Use the 802.1x Protocol Version (for EAP authentication) pull-down menu to select the draft of the 802.1x protocol the access point radio should use. Menu options include:
•Draft 7—No radio firmware versions compliant with Draft 7 have LEAP capability, so you should not need to select this setting.
•Draft 8—Select this option if LEAP-enabled client devices that associate with this access point use radio firmware versions 4.13, 4.16, or 4.23.
•Draft 10—This is the default setting. Select this option if client devices that associate with this access point use Microsoft Windows XP EAP authentication or if LEAP-enabled client devices that associate with this access point use radio firmware version 4.25 or later. The functionality in Draft 10 is equivalent to the functionality in Draft 11, the ratified draft of the 802.1x standard.
Step 3 Click Apply or OK to apply the setting. The access point reboots.
Select WEP Key 1 as Transmit Key for EAP Authentication
If you use Network-EAP as the authentication type on your wireless network, you must select key 1 as the transmit key on the access point AP Radio Data Encryption page. The access point uses the WEP key you enter in key slot 1 to encrypt multicast and broadcast data signals that it sends to EAP-enabled client devices. Because the access point transmits the WEP key used for multicast messages to the EAP-enabled client device during the EAP authentication process, that key does not have to appear in the EAP-enabled device's WEP key list. The access point uses a dynamic WEP key to encrypt unicast messages to EAP-enabled clients. When you set up a repeater access point to authenticate as a LEAP client, the repeater derives a dynamic WEP key and uses it to communicate with the root access point. Repeaters not set up for LEAP authentication use static WEP keys when communicating with other access points.
Note If you do not use EAP authentication on your wireless network, you can select any WEP key as the transmit key. If you use EAP authentication and you enable broadcast key rotation, you can enable WEP without entering WEP keys.
MIB File Compatible with Firmware Version 11.00 and Later
The access point MIB file (AWCVX-MIB) is supported only by access point firmware version 11.00 and later. Earlier versions of firmware do not support this MIB. You can download the access point MIB at http://www.cisco.com/public/sw-center/sw-wireless.shtml.
Hot Standby Mode and Radio Diagnostics Available for 2.4-GHz Radio Only
Hot Standby mode is available only for the 2.4-GHz radio in access points that contain two radios. Hot Standby mode is not available for 5-GHz radios. Also, the Carrier Test and Antenna Alignment radio diagnostics tool are available only for the access point's 2.4-GHz radio.
This section lists important information about access points running firmware version 11.56.
Error Message Appears for Access Points with One Radio
When you install firmware version 11.56 in an access point with one radio, an error message appears. If your access point contains only the internal 2.4-GHz radio, this error message appears:** Failed to Load Driver for device entry #3.
If your access point contains only the external 5-GHz radio, this error message appears:** Failed to Load Driver for device entry #2.
You can ignore these messages. The errors do not appear if your access point contains two radios.
Enabling Broadcast Key Rotation on One Radio Enables It on Both Radios
If you enable Broadcast Key Rotation on one of the radios in a dual-radio access point, Broadcast Key Rotation is automatically enabled on the other radio.
Set Flow Control to None or Xon/Xoff When Using Terminal Emulator
The terminal emulator flow control setting for 1200 series access points (none or Xon/Xoff) differs from the flow control setting for 340 and 350 series access points (none, Xon/Xoff, or Hardware).
To use a terminal emulator to open the 1200 series access point's command-line interface (CLI), use these settings for the terminal emulator connection:
•8 data bits
•1 stop bit
•No flow control or Xon/Xoff
Reboot of Workgroup Bridges Required When Allowing More Than 20
With firmware version 11.56, you can select no for the Classify Workgroup Bridges as Network Infrastructure setting on the AP/Root Radio Advanced page to allow up to 50 workgroup bridges to associate to the access point. When you select no for this setting, you must reboot workgroup bridges associated to the access point.
Cisco Discovery Protocol Re-Enabled for Individual Interfaces on Reboot
The Cisco Discovery Protocol (CDP) feature is enabled by default, and CDP is enabled for each of the access point's CDP-relevant interfaces by default. However, if you disable CDP for one of the individual interfaces, the access point re-enables CDP for that interface when it reboots. If you disable CDP completely, the access point does not re-enable CDP on reboot.
This section lists resolved and open software issues in firmware version 11.56.
Getting Bug Information on Cisco.com
If you are a registered Cisco user, you can use the Cisco TAC Software Bug Toolkit, which consists of three tools (Bug Navigator, Bug Watcher, and Search by Bug ID Number) that help you identify existing bugs (or caveats) in Cisco software products.
The following caveats have not been resolved for firmware version 11.56:
•CSCdy03381—One access point radio sometimes fails to restart after a warm reset. Workaround: Perform a cold reboot of the access point if one of the radios does not restart.
•CSCdy10787—The access point aborts any configuration containing an unknown MIB variable. When an access point receives a configuration from another access point that is running a newer firmware version than the receiving access point, the receiving access point aborts the configuration if it encounters a MIB variable that it does not recognize. Workaround: Upgrade access points to the same firmware version before distributing configurations.
•CSCdy11906—When WEP is enabled and you set all WEP keys to not set, WEP is still enabled but the web-browser page indicates that WEP is disabled. Workaround: To disable WEP, select no encryption from the Use of Data Encryption by Stations is drop-down menu on the Radio Data Encryption page.
•CSCdy20169—When a 1200 series access point boots, it sometimes displays this warning:(Warning) Routine "pktRouterRcvRtn" is unable to Take the forwardTbl Guard semaphore
You can ignore this message.
•CSCdy25035—You must reboot the access point when you enable or change accounting parameters before the new settings take effect.
•CSCdy27831—When you set the default Unicast Address Filter to disallowed, you must reboot the access point before the setting takes effect.
•CSCdw53237—When you change the access point's role in radio network from repeater to root, the link from the access point to the previous root device remains active. Workaround: Reboot the access point after changing its role from repeater to root.
•CSCdy72082—The MIB variable bootconfigBootCount cannot be accessed using SNMP.
•CSCdy72838—When you enable WEP, MIC and TKIP on a repeater access point and configure the repeater to LEAP authenticate, the repeater displays this message when it reboots:Error setting unicast MIC seed (status=0x0047)!
The repeater then displays messages reporting MIC errors. When this state occurs on the repeater, the parent access point displays this message:<repeater MAC address> Associated with Encryption, then attempted to send an unencrypted packet to <root MAC address>.
Reboot the root access point to clear this condition. Workaround: Disable MIC on 1200 series repeater access points.
•CSCdy73695—When a repeater access point receives packets from a root access point while the repeater is attempting to associate, the repeater sometimes displays this error:00:00:10 (Warning): Station <Root MAC address> Associated with Encryption, then attempted to send an Unencrypted packet to <Repeater MAC address> (length 74)
The error occurs when WEP is not enabled on either the root or the repeater. When an association response is received by the repeater, it no longer displays the error message and is able to successfully pass data. However, if a significant amount of traffic, such as multicast traffic, is being transmitted by the root access point while the repeater is attempting to associate, the repeater misses the association response from the root access point and never fully associates. In this case, the root access point reports that the repeater is associated and the repeater reports that it is only authenticated. The repeater continues to display warning messages about receiving unencrypted packets and does not recover until it is rebooted.
•CSCdx80069—The access point incorrectly buffers packets for wireless phones in power save mode.
•CSCdw83703—The access point sometimes reports this error when LEAP-enabled workgroup bridges are associated:Could not allocate mBlk from netPool 0x00d0a5a8!
You can ignore this message.
The following caveats are resolved in version 11.56:
•CSCdx03420—The default setting for the Require use of Radio Firmware X.XX setting on the AP/Root Radio Advanced page is now yes instead of no. This setting prevents the AP radio from going down when when you upgrade or downgrade firmware.
•CSCdx03869—Non-initial fragments (that only have the IP header info, but no UDP port info) are no longer blocked by IP port filters defined on the access point.
•CSCdx07970—You can now restore defaults on the Ethernet Protocol Filters and Root Radio Protocol Filters pages in the CLI.
•CSCdx11703—Hot standby packets no longer flood the network.
•CSCdy12876—1200 series access points no longer lock up under extremely large bursts of Ethernet traffic.
•CSCdy13227—The repeater statistics page is now operational. When you associate a repeater access point to a root access point, a link to the repeater appears on the root access point's Summary Status screen. When you click the link, the page now appears.
•CSCdw16742—Broadcast key rotation now works with repeater access points.
•CSCdx19068—Unlimited LEAP logins configuration on ACS server no longer locks out roamed clients. When the ACS server's session policy is configured for other than unlimited simultaneous LEAP logins and a LEAP-enabled client device roams away from the access point long enough for a STOP record to appear in the Radius Accounting log, the client now can reauthenticate.
•CSCdx19118—The access point no longer reboots when more than 23 workgroup bridges are associated to it and you change the SSID, the Classify Workgroup Bridges as Network Infrastructure setting, or the Requested Status setting.
•CSCdy27377—The Least Congested Channel feature now works for the 5-GHz radio.
•CSCdx32469—When you set up a standby access point with Open authentication with Require EAP enabled and with LEAP enabled, the radio on the monitored access point no longer shuts down.
•CSCdw39535—Disabling or enabling the Aironet Extensions setting on the access point no longer requires a restart of the access point radio.
•CSCdx41471—Enabling MIC on 1200 series access points no longer decreases throughput by up to 30% for the access point's highest data rates.
•CSCdy43717—The access point now allows IPX client devices to join the network.
•CSCdx51311—If you lose or forget the password required to log into the access point management system, you can now use the :resetall command in the CLI even if you select no for the the Allow Read-only Browsing Without login setting on the User Manager Setup page.
•CSCdx54135—When the access point loads a .ini file and encounters a command that requires it to reboot, the access point now commits changes before rebooting.
•CSCdx54863—When you manually configure the Ethernet/Duplex settings on the access point, the settings are applied correctly.
•CSCdw64129—The access point now sends an accounting request to the ACS server when an EAP-enabled client device that is already authenticated on the network re-authenticates using a different user name through the LEAP Manual Login option in the Aironet Client Utility (ACU).
•CSCdx67300, CSCdu13008, and CSCdy23465—The access point no longer disables DNS lookups after two failures; it now temporarily disables DNS lookups for 5 minutes and then re-enables DNS lookups. After 5 minutes, the next DNS request re-enables DNS lookups, and the access point logs this event to notify the user that DNS is reenabled.
•CSCdx83033 and CSCdx35390—The access point now successfully loads the configuration file via FTP.
•CSCdw83249—When you click the MAC address of an access point listed in the Association Table to display the Station page for that access point, the Station page now displays the correct uptime for the access point.
•CSCdx93214—Broadcast key rotation now works on second-level repeater acess points. For example, in a repeater chain consisting of a root access point, a repeater access point associated to the root, and a second repeater associated to the first repeater, the second repeater now can pass data when brodacast key rotation is enabled.
For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at http://www.cisco.com/tac. Select Wireless Technologies under Top Issues.
This section describes errors, changes, and omissions for the access point user documentation.
The screen shot on page 18 in the Quick Start Guide: Cisco Aironet 1200 Series Access Points mistakenly shows that the Ensure Compatibility With 2Mb/sec Clients or non-Aironet 802.11 setting is available for the 5-GHz radio module on the Express Setup page. However, this setting is available only for the 2.4-GHz internal radio and is not available for the 5-GHz radio module. Figure 2 shows a corrected screen shot of the Express Setup page.
Figure 2 Corrected Screen Shot of the Express Setup Page
The Rogue AP Alert Timeout setting on the Association Table Advanced page is reserved for future use. Currently, this feature is not supported, and it has no effect on access point performance.
Use the following documents with this document:
•Quick Start Guide: Cisco Aironet 1200 Series Access Points
•Quick Start Guide: Cisco Aironet 1200 Series Access Point Radio Upgrade Instructions
•Cisco Aironet 1200 Series Access Point Hardware Installation Guide
•Cisco Aironet 1200 Series Access Point Software Configuration Guide
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Copyright © 2002, Cisco Systems, Inc.
All rights reserved.