CCNA Wireless Official Exam Certification Guide part 30 pps

262 CCNA Wireless Official Exam Certification Guide 2. Which methods can be used to assign an IP address to a standalone AP? (Choose all that apply.) a. DHCP b. Static through the CLI c. TFTP d. DNS 3. What are three methods that require an IP address? (Choose all that apply.) a. Console to it using a console cable and the console port. b. Telnet into it if it has an IP address. c. Web browse to it if it has an IP address. d. SSH into it if it has an IP address. 4. Which of the following methods can be used to obtain the IP address of the AP? (Choose all that apply.) a. DHCP server logs b. CDP c. NTP server statistics d. IP Setup Utility 5. You can apply a separate SSID to different radios. True or False? a. True b. False 6. More than one authentication server can be configured. True or False? a. True b. False 7. What is required if you are converting from standalone to lightweight mode? (Choose all that apply.) a. An upgrade image b. A DHCP server c. An upgrade tool d. A WLC 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 262 Chapter 14: Migrating Standalone APs to LWAPP 263 8. If you are using the Autonomous to Lightweight Mode Upgrade tool, what else must you obtain from Cisco? a. A TFTP server b. A WCS c. The correct LWAPP software (version 12.3(JA) or better) d. Autonomous to Lightweight Mode Upgrade image 9. What protocol is used for the upgrade from autonomous to lightweight? a. FTP b. TFTP c. SCP d. SSH 10. A controller must be reachable after the AP is upgraded for the AP to function. True or False? a. True b. False 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 263 264 CCNA Wireless Official Exam Certification Guide Foundation Topics Connecting to a Standalone AP Almost any AP that is capable of operating in both autonomous and lightweight mode ships in autonomous mode. You need to convert the device to lightweight mode if you plan to use it in that mode. Luckily, you can accomplish this conversion in two ways. You can get a Windows application called the Upgrade tool to do it, and you can get it done using the Cisco Wireless Control System (WCS). Either method accomplishes the same task; it is simply a matter of what you prefer and what you have access to. After the device is in lightweight mode, you can manage it through the Cisco wireless LAN controllers (WLC). Understand, however, that Cisco provides customers with the flexibility of run- ning either IOS or LWAPP, and an AP can be purchased in whatever form as needed. Accessing the AP in Autonomous Mode You can access an autonomous AP in four ways: ■ Console to it using a console cable and the console port. ■ Telnet into it if it has an IP address. ■ Browse to it with a web browser if it has an IP address. ■ SSH into it if configured (preferred over Telnet). You might be wondering how to get an IP address for an autonomous AP. The answer is simple: use DHCP. You just plug in the autonomous AP, and it grabs an address on its own. Note, however, that the device does not have a service set identifier (SSID) configured by default, and the radio is disabled by default; this is true for any IOS release later than 12.3(4)JA. In fact, the autonomous AP has a yellow sticker right on the outside of the box that indicates this. When you consider why, you begin to realize that it is a good security mechanism. You do not have to worry about people associating with the AP while you are scrambling to set it up. If you are wondering how you are going the find the AP when it has a dynamic address, you can try to get the IP from the DHCP server, which you might or might not have access to. You can also use Cisco Discovery Protocol (CDP) on the switch that the AP is con- nected to, and you can sometimes use the command show arp | include mac-address (as- suming that the IP address is in the CAM table), or you can use a tool created by Cisco called the IP Setup Utility, seen in Figure 14-1. The IP Setup Utility takes the MAC ad- dress of the AP and resolves the IP address associated with it. You can get the MAC ad- dress from a sticker on the AP. After you obtain the IP address, you can access the AP via a web browser. Figure 14-2 shows the initial page when you log in to the AP. To quickly configure the settings of the AP, you can use the Express Setup and Express Security Pages. Key Topi c 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 264 Figure 14-1 IP Setup Utility Figure 14-2 Initial Login to the AP Chapter 14: Migrating Standalone APs to LWAPP 265 Using the Express Setup and Express Security for Basic Configuration From the initial login screen, you quickly can gain valuable information about clients, re- peaters, interfaces, and events. To quickly set up the AP, use the EXPRESS SET-UP and EXPRESS SECURITY links in the left menu. You are prompted for the following: ■ Hostname of the device Key Topi c 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 265 266 CCNA Wireless Official Exam Certification Guide ■ Method of IP address assignment ■ IP address ■ Subnet mask ■ Default gateway ■ SNMP community ■ Radio properties, as seen in Figure 14-3 ■ 802.11G properties, including its role ■ 802.11A properties, including its role It is that easy. Simply click Apply for the settings in the Express Setup page to take effect. As for the Express Security configuration, this is where you assign an SSID, determine whether it will be broadcast, apply VLANs, and define the security settings such as Wired Equivalent Privacy (WEP), Wi-Fi Protected Access (WPA), and WPA2. If you enable VLAN IDs, you can have more than one SSID and apply the security settings differently to each VLAN. Again, you need to apply the changes with the Apply button. Figure 14-4 shows a sample of the Express Security page. Figure 14-3 Express Setup Radio Properties 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 266 Figure 14-4 Express Security Setup Chapter 14: Migrating Standalone APs to LWAPP 267 Following are some other important facts related to the configuration of SSIDS and secu- rity: ■ You cannot tie an SSID to a particular radio; the SSID configured applies to both ra- dios. ■ You cannot set up more than one authentication server. ■ You cannot combine authentication types. After applying the Express Setup and Express Security configuration, you can use the web interface for additional configuration. Working with the Web Interface At this point, assuming you have followed along through the section, “Using the Express Setup and Express Security for Basic Configuration,” you do not necessarily have a func- tional AP. As mentioned previously, the radios are now disabled by default. You can see this from the home page: Step 1. Click HOME from the left menu. Step 2. View the status of the radios under the Network Interfaces section. 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 267 268 CCNA Wireless Official Exam Certification Guide You can use two different methods to enable the radios: ■ Select the NETWORK INTERFACES link on the left menu, select the ra- dio, and then select the Settings button and enable the radio with the Enable radio button. ■ Click on the radio link on the home page, as seen in Figure 14-5 (in this case, Radio0-802.11G or Radio1-802-802.11A). After you have accessed the Settings page, you can enable the radio following the same process as the first method described. When the radio is enabled, you have a working AP. Note: You might want to spend some time getting familiar with the options in the web in- terface; however, for the CCNA wireless exam, it is not as significant of a topic as the light- weight configurations. Figure 14-5 Radio Configuration 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 268 Chapter 14: Migrating Standalone APs to LWAPP 269 That being said, with a functional AP, you can allow users access to the network. Recall, however, that the goal is to use this AP with a controller. This means you need to convert this autonomous AP to a lightweight AP. Converting to LWAPP Three methods you can use to convert the AP to lightweight mode are as follows: ■ Use the IOS to LWAPP conversion utility. This is an installable application that you can download from Cisco.com. ■ Use the WCS. If you have a WCS, this method is probably preferred; however, it is not covered as part of the CCNA wireless certification. ■ As of July 2005, simply archive the image to the AP to convert it to LWAPP. The section that follows examines the IOS-to-LWAPP conversion. Converting to LWAPP Using the IOS-to-LWAPP Conversion Utility Before you can use the IOS-to-LWAPP conversion utility, you need to obtain the software. To do so, you need to access the AP download page at Cisco.com. To do so, follow these steps: Step 1. Go to www.cisco.com/go/wireless. Step 2. Click the AP you are working with. The list of APs is at the bottom of the page. Step 3. On the AP page, from the right side of the page in a box labeled Support, click the Download Software link. Step 4. Using the menu tree, find the AP you are looking for, and expand the folder. Step 5. Select the link to the AP inside that folder. Step 6. Enter your Cisco username and password. When you have authenticated to Cisco, you will see a page similar to the one in Figure 14-6. Notice that this page offers four links: ■ Autonomous to Lightweight Mode Upgrade Image ■ Autonomous to Lightweight Mode Upgrade Tool ■ IOS Software ■ IP Setup Utility (IPSU) The first link is to the Autonomous to Lightweight Mode Upgrade Image. You need this image to perform the upgrade. It is not the same image that runs on the controller. Recall that the controller and AP need to be on the same version; however, any mismatch is cor- rected when an AP finds a controller. If the code versions are different, the controller ei- ther upgrades or downgrades the AP. This Autonomous to Lightweight Mode Upgrade image simply gets LWAPP functionality on the AP. From there, the controller can handle the rest. 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 269 270 CCNA Wireless Official Exam Certification Guide Figure 14-6 Download Area of Cisco.com The second link on the Downloads page is to the Autonomous to Lightweight Mode Up- grade Tool. This is the software application you need to perform the upgrade. This soft- ware installs on a Windows computer. The third link on the Downloads page is to IOS Software, and the fourth link is for the IP Setup Utility. Select the link to download the software you need. Because you want the IP Setup Utility for this task, click that link. After you have the Autonomous to Lightweight Mode Upgrade Tool software and the Au- tonomous to Lightweight Mode Upgrade image, you are ready to install it on a Windows PC. After it is installed, you can perform the upgrade. Before performing the upgrade, however, you must meet the following requirements: ■ IOS on the AP must be version 12.3(7)JA or above. If it is not, upgrade it first by se- lecting the IOS Software link on the Downloads page. ■ The WLC must be running version 3.1 or later. Keep in mind that after you do the up- grade from autonomous to lightweight, the AP cannot function without the con- troller, and the console port is no longer useful. Also, the upgrade supports only Layer 3 LWAPP mode. To begin the upgrade, first check to see if you are running a code version on the AP that is capable of being upgraded. In Figure 14-7, the code version is 12.3(7)JA4. This indicates that the version is compatible. Key Topi c 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 270 Chapter 14: Migrating Standalone APs to LWAPP 271 Figure 14-7 Verify the IOS Version Note: You can order new LWAPP-capable APs with the lightweight code already installed if desired. After you have verified the IOS version, you need to make sure that the controller and the AP are on the same subnet or that the controller is reachable after the upgrade. You can do this via DHCP option 43 or DNS. The next step is to prepare a text file of APs that you want to upgrade. I recommend using Notepad so that you can save it as a .txt file. In the text file, the format should resemble the following: ap-ip-address, telnet-username, telnet-Password, enable-password Create a new line for each AP that you want to convert. When you are finished with the text file, save it somewhere that you can find it, and name it something like APList.txt. You are going to browse to this file in the Upgrade tool interface. As a final preparation step, you need to make sure that the upgrade code is on the local machine. The steps described in the preceding paragraphs detailed where you can obtain this, so make sure you have it. You will be using the TFTP protocol to upgrade the AP, so you can use Tftpd32, which you can download for free from http://tftpd32.jounin.net, or you can use the TFTP serv- ice that is integrated in the Upgrade tool. 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 271 . 262 CCNA Wireless Official Exam Certification Guide 2. Which methods can be used to assign an IP address to a standalone. False? a. True b. False 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 263 264 CCNA Wireless Official Exam Certification Guide Foundation Topics Connecting to a Standalone AP Almost any AP that is. the device Key Topi c 16_1587202115_ch14.qxd 9/29/08 2:40 PM Page 265 266 CCNA Wireless Official Exam Certification Guide ■ Method of IP address assignment ■ IP address ■ Subnet mask ■ Default