Table Of Contents
Release Notes for Cisco Aironet 1200 Series Access Points Running VxWorks Firmware Version 12.04
November 10, 2003
These release notes describe caveats for Cisco Aironet 1200 Series Access Points running VxWorks firmware version 12.04. 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 a facility while maintaining uninterrupted access to the network.
The 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 only one radio of each type. You can configure the radios separately using different settings on each radio.
Access points use a browser-based management system, but you can also configure them using a terminal emulator, a Telnet session, or Simple Network Management Protocol (SNMP).
You can find the latest release of access point firmware at this URL:
Invalid Console Message on Reboot
When upgrading to 12.04 from an earlier version, the following console message appears when the system reboots:Inflating EnterpriseAP Sys 12.03...
The message is invalid and should be ignored.
Installation in Environmental Air Space
This section provides information on installing 1200 series access points in environmental air space, such as above suspended ceilings.
The 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 exposed 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 104oF; 0 to 40oC) 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 48 VDC. Voltage higher than 48 VDC can damage the equipment.
Caution Cisco Aironet power injectors are designed for use with Cisco Aironet access points and bridges 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 for 1200 Series Access Points
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 VxWorks version 12.04.
Your access point must be running VxWorks firmware version 11.40T or later to install VxWorks firmware version 12.04.
Upgrading to a New Firmware Release
Finding 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.
Follow these steps to install access point firmware:
Step 1 Follow this link to the Software Center on Cisco.com and download VxWorks firmware version 12.04:
Step 2 Select Option #1: Aironet Wireless Software Selector. The Aironet Wireless Software Selector window appears.
Step 3 Click the drop-down menu to view the valid values for the Product Type field.
Step 4 Click Access Point.
Step 5 Click Submit. The Step 2 of 3 page appears.
Step 6 Click the drop-down menu to view the valid values in the Model Number field.
Step 7 Select the model number for your access point.
Step 8 Click Submit. The Step 3 of 3 page appears.
Step 9 To download the current release, click the radio button for the current release, which is 12.04.
Step 10 Click Submit. The software selector displays the categories you selected and lists the available download methods.
Step 11 Review your selections. If you want to change anything, use your browser's back button to return to the previous software selector page.
Step 12 When you are ready to download the firmware, go to the Standard Installation section and click Access Point Bundle. The Aironet Software Selector encryption authorization form appears.
Step 13 Complete the required fields on the authorization form and check the boxes indicating agreement with the download agreement.
Step 14 Type your name exactly as you entered it in the First Name and Last Name fields.
Step 15 Click Submit. The Software Download Software License Agreement page appears.
Step 16 Review the license agreement and click Accept. The File Download window appears.
Step 17 Click Save and select a location at which to save the file.
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 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.
Caution 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 shut off 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 shut off 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 version 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 8 802.1x-2001
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 later1
AP34x/35x 11.07 and later
AP12xx 11.40T and later
1 The default draft setting in access point VxWorks firmware version 11.06 and later is 802.1x-2001.
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) drop-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.
•802.1x-2001 (formerly 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.
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 VxWorks Firmware Version 11.00 and Later
The access point MIB file (AWCVX-MIB) is supported only by access point VxWorks firmware version 11.00 and later. Earlier versions of firmware do not support this MIB. You can download the access point MIB at this location:
Hot Standby Mode and Radio Diagnostics Availability
The hot standby feature is available on dual mode access points. To make the feature operational, both radios must be set to the hot standby mode.
The Carrier Test and Antenna Alignment radio diagnostics tool are available only for an access point's 2.4-GHz radio.
This section lists important information about access points running VxWorks firmware version 12.04.
MAC Address Filtering
Version 12.04 has added a new method of MAC address filtering. The filter is based on whether or not the address is a client. A new "Client Disallowed" button on the Address Filters page allows users to determine whether or not a client having a specific MAC address is allowed to associate to the access point. Using the "Client Disallowed" feature prevents clients from assuming sensitive MAC addresses on the user's network.
Setting ACS Session Timeout
Version 12.04 has added a MAC authentication timeout featurette which is used in conjunction with MAC authentication caching. It enables administrators to control MAC authentication session time in seconds by configuring the ACS with RADIUS attribute Session-Timeout (27). When the session time expires, the access point deauthenticates the client and removes the cached MAC authenticated entry. When the client re-associates, the access point performs a MAC authentication operation with the ACS.
Note This featurette addresses resolved caveats CSCec08844, CSCec35327, and CSCeb61728.
SQL Worm Virus Vulnerability
In certain situations, the access point could be affected by the SQL Worm virus. The signature of this worm appears as high volumes of UDP traffic to port 1434. Symptoms on Cisco devices include but are not limited to high CPU usage and traffic drops on the input interfaces.
The worm has been referenced by several names including Slammer, Sapphire, and MS SQL.
Cisco has prepared a security notice containing details about this virus and how to eliminate it. The document is on Cisco.com at the following link:
Cisco Aironet Software Requires Completion of Encryption Authorization Form
In order to access Cisco Aironet software from the Software Center on Cisco.com, you must now fill out a form to receive authorization to download encrypted software. Registered Cisco.com users are required to fill out the form only once, but public users must do so once each session, each time software is downloaded. A form is automatically created for public users. The form for registered Cisco.com users is located at the following URL:
Adding or Deleting Proxy Mobile IP AAPs
If you need to add or delete proxy Mobile IP authoritative access points (AAPs), you must disable proxy Mobile IP before changing the configuration. Follow these steps.
Step 1 Browse to the Setup page.
Step 2 In the Services section, click Proxy Mobile IP. The Proxy Mobile IP Setup page appears.
Step 3 Click General. The Proxy Mobile IP General page appears.
Step 4 Change the Enable Proxy Mobile IP setting to no.
Step 5 Add or delete AAPs as necessary.
Step 6 Change the Enable Proxy Mobile IP setting to yes.
Error Message Appears for Access Points with One Radio
When you install VxWorks firmware version 12.04 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.
Installing a 5-Ghz Radio May Require Updating Firmware
If you upgrade a 2.4-GHz access point by adding a 5-GHz radio module, you must ensure that the firmware is updated prior to installing the radio, otherwise the access point fails to recognize the new radio. In order to install the 5-GHz radio module, the access point must be running VxWorks version 11.54T or later in a VxWorks-based access point or IOS Release 12.2(8)JA or later in an IOS-based access point.
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 enabled automatically 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 VxWorks firmware version 12.04, you can select no for the Classify Workgroup Bridges as Network Infrastructure setting on the AP/Root Radio Advanced page to allow up to 20 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.
The "Reliable multicast messages from the access point to workgroup bridges" setting limits reliable delivery of multicast messages to approximately 20 Cisco Aironet Workgroup Bridges that are associated to the access point. The default setting, disabled, reduces the reliability of multicast delivery to allow more workgroup bridges to associate to the access point.
Access points and bridges normally treat workgroup bridges not as client devices but as infrastructure devices, like access points or bridges. Treating a workgroup bridge as an infrastructure device means that the access point reliably delivers multicast packets, including Address Resolution Protocol (ARP) packets, to the workgroup bridge.
The performance cost of reliable multicast delivery—duplication of each multicast packet sent to each workgroup bridge—limits the number of infrastructure devices, including workgroup bridges, that can associate to the access point. To increase beyond 20 the number of workgroup bridges that can maintain a radio link to the access point, the access point must reduce the delivery reliability of multicast packets to workgroup bridges. With reduced reliability, the access point cannot confirm whether multicast packets reach the intended workgroup bridge, so workgroup bridges at the edge of the access point's coverage area might lose IP connectivity. When you treat workgroup bridges as client devices, you increase performance but reduce reliability.
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 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.
Symbol IP Phone Issues
When a Symbol IP phone is associated to a VoIP VLAN (Symbol extensions enabled), the phone associates to the access point and is authenticated approximately every 2 seconds. the Symbol phone shows a "No Network" error every 1 to 2 minutes. It also appears that Symbol phones do not work well when using a non-primary SSID. It is possible that the phone does not perform an active probe and therefore does not detect information about the SSID it associated with in the beacon, causing it to reassociate and authenticate.
Symbol phones may disconnect and be unable to roam between subnets when the access point passes multicast or FTP traffic. If there are no FTP or multicast sessions in progress the Symbol phone operates normally and is able to roam between subnets. To work around this issue, limit multicast and FTP traffic if you are using Symbol IP phones in a proxy Mobile IP environment.
This section lists resolved and open software issues in VxWorks firmware version 12.04.
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.
Access the TAC Software Bug Toolkit at:
The following caveats have not been resolved for VxWorks firmware version 12.04:
•CSCec22942—Client cannot always obtain a DHCP address across VLANs.
In a system configured with VLANs, the client associates to a VLAN but does not always get an IP address.
There is no workaround for this caveat.
•CSCdz30285—The Configuring the Cisco Wireless Security Suite application note is incorrect.
The screen capture in section 3.1 of this document shows Add AAA Server, which is incorrect as the Aironet device is a client of the ACS, not a server.
Workaround: Call the TAC for setup instructions.
•CSCec60688—The access point sometimes drops all client associations and stops communicating through both the radio and Ethernet ports.
Workaround: Disable DNS on the access point.
•CSCea66593—Access point reboots sporadically because of a protection violation in tRcv_awc0.
Reboots can occur within a 2 to 3 hour period or remain on line for several days and occur based on a protection violation of data accessed associated with task tRcv_awc0.
There is no workaround for this caveat.
The following caveats are resolved in VxWorks firmware version 12.04:
•CSCea44315—Intermittent AWCO stop/start no longer causes wireless clients to disassociate.
•CSCea47390—Access point no longer crashes on task 0x97d2d8 "tThttpd."
•CSCea51324—Enabling MIC on a 350 series bridge no longer blocks communication.
•CSCea65900—TFTP downloads no longer cause the access point to crash.
•CSCeb27772—The access point no longer crashes due to excess memory consumed by maintaining the association table.
•CSCeb55765—The auto channel-select feature now works as expected.
•CSCeb58467—A long If-Modified-Since header no longer causes a Buffer overflow in Trivial HTTP (THTTPd).
•CSCeb61648—The access point now sends accounting request packets when a client attempts a double LEAP login.
•CSCeb61728, CSCeb87616, CSCec00332, CSCeb73542—The access point no longer hangs when too many client devices associate to it.
•CSCeb75140—The access point no longer stops sending beacons unexpectedly.
•CSCeb76379—When a client that has been assigned to a VLAN disassociates and then reassociates to the access point, the client no longer has to wait to be reassigned to the correct VLAN.
•CSCeb82272—Client devices using EAP-SIM can now log off from a connection to an access point and successfully log back in.
•CSCeb84020—Bridge links are now stable when the non-root bridge is configured to authenticate to the root bridge using LEAP authentication.
•CSCeb85983—Non-root bridges no longer hang when they lose association with the root bridge.
•CSCec20567—Non-root bridges now reassociate after losing connectivity to the root bridge.
•CSCec53509—You can now define client MAC addresses that are not allowed to associate to the access point.
•CSCin46604—The Solicitations Sent counter on the authoritative access point now increments correctly by 1.
•CSCin46620—Resetting All System Factory Defaults now deletes existing VLAN numbers.
•CSCin46639—When configured to do so, the access point now switches to repeater mode when Ethernet link is down.
The following is a status of caveats published in the release notes for previous VxWorks versions that were not resolved in version 12.04:
•CSCeb79415—The access point association table does not display a client name, device type, or software version for Cisco 7920 phones that associate to the access point.
This caveat has been closed because Cisco 7920 phones do not support Aironet Extensions. The access point displays values for the client name, device, type, and software version fields in the association table only for client devices that support Aironet Extensions.
•CSCin45850—A valid access point is not reporting a rogue access point in its logs when an invalid RADIUS server IP address is used in the rogue AP.
This caveat has been closed.
•CSCin46049—Client is always forced to EAP-associate with multiple VLANs.
Cisco has been unable to reproduce this caveat.
•CSCin46851—After roaming from its home network to the foreign network, the mobile node fails to reach the home or foreign agent but associates to the authoritative access point on the foreign network. The mobile node must fully reathenticate to reach the entire network.
Cisco has been unable to reproduce this caveat.
•CSCea64908—Voice stream is interrupted when using Spectralink IP phones or Cisco 7920 wireless IP phones with 1200 series access points.
There is no workaround for this caveat and Cisco will not be addressing it in future releases.
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.
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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