According to the following figure, what version of controller code is in use?. What does an AP do if a controller is running a higher version of software?aa. If an AP leaves one controll
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1. According to the following figure, what version of controller code is in use?
a. 5.0.148.0
b. 192.168.1.50
c. +38 C
d. 4.1.2.60 (Mesh)
2. What do you choose to verify the version of hardware?
a. Controller > General
b. Controller > Inventory
c. Management > Summary
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Trang 23. Which statement about the following figure is true?
a. The AP being viewed is the Lobby-AP
b. The AP is running in autonomous mode
c. The AP has a static IP address
d. The AP is running software version 5.0.148.0
4. Which extension is used in controller upgrade files?
a. bin
b. exe
c. cfg
d. aes
5. Which protocols are used to upgrade a controller? (Choose two.)
a. FTP
b. TFTP
c. HTTP
d. SCP
Trang 36. What does an AP do if a controller is running a higher version of software?
a. It does nothing; they don’t need to be the same
b. It automatically upgrades to the same version as the controller
c. It causes the controller to downgrade to the same version as the AP
d. It reboots continuously and keeps searching for a controller with the same version
7. If an AP leaves one controller and associates with another, what does it check?
a. The controller’s hardware version
b. How many licenses the controller has
c. The version the controller is running
d. The version that other APs are running
8. The WCS is upgraded using what method?
a. WCS code upgrade script
b. FTP
c. TFTP
d. SCP
9. How do you save the controller’s configuration using the web interface?
a Choose Commands > Save.
b Click the Save Configuration link.
c Choose Commands > Copy-Run-Start.
d Choose Controllers > Save.
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Trang 410 If you clicked the Upload button on the page shown in the following figure, what
would happen?
a. The controller software would get backed up to an FTP server
b. The controller configuration would be archived to an NFS server at the IP address 192.168.2.96
c. The controller configuration would be uploaded in clear text using a TFTP server
d. The controller configuration would be encrypted and uploaded to 192.168.2.96 using TFTP
11. In what format is the controller configuration file?
a. XML
d. Clear text
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Foundation Topics Upgrading a Controller
Management tasks in the controller involve upgrading or downgrading images as well as managing configuration files You can begin working with these files by verifying the
ver-sion currently running on the controller Figure 19-1 shows the MONITOR > Summary
page, which indicates that the version of code on this particular controller is software sion 4.1.192.17M (Mesh) 5.x is the current version of code, so you need to obtain the ver-sion you want to have loaded before performing the upgrade
You also need to know the hardware with which you are working You can find the
hard-ware information by choosing CONTROLLER > Inventory and verifying the platform.
The platform used in this example is an AIR-WLC4402-12-K9, as shown in Figure 19-2 For the record, you might as well verify the AP hardware being used To verify the AP
software version, choose WIRELESS > All APs, and click the AP name you want to
ver-ify In Figure 19-3, the Lobby-AP has been selected You see a configuration page with four tabs:
■ General
■ Inventory
Figure 19-1 Verify the Controller Software Version
Key
Topic
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Trang 6Figure 19-2 Verify the Hardware Version
Figure 19-3 General Details for the Lobby-AP
Key Topic
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Note Sometimes you have to upgrade through prior releases of software up to the version you ultimately want This is because the older versions of code have a built-in TFTP client that does not support file transfers greater than 32 MB The following URL is a good refer-ence for helping network engineers or administrators determine an upgrade path: http:/ /www.cisco.com/en/US/tech/tk722/tk809/
technologies_configuration_example09186a00805f381f.shtml
■ Interfaces
■ Advanced The General tab displays the software (S/W) version, as shown in Figure 19-3
In the figure, the version on the AP is 4.1.192.17M (Mesh), which is the same version that
is running on the controller
Selecting the Inventory tab displays the hardware version In this case, the Lobby-AP is an AIR-AP1131AG-A-K9, as shown in Figure 19-4
Now you have all the version information you need to upgrade the controller software ver-sion The next step is to determine which upgrade approach you will take
Controller Upgrade Approaches
You can take two approaches when upgrading the controller You can use the command-line interface (CLI), or you can use the web-based interface To keep things simple, we will focus on the web interface method
Start by going to the Cisco Software Center (www.cisco.com/go/software) and download-ing the image you want to install The image should have an aes extension This is a com-pressed archive file Three files are included in the aes comcom-pressed file:
■ RTOS:The controller’s Real-Time Operating System
■ CODE:Airwave Director, command-line interface, and the controller’s switch web interface
■ ppcboot.bin:The controller’s bootloader The next step is to place the aes file on a TFTP server Tftpd32 is a common TFTP server program that can you can obtain from http://tftpd32.jounin.net As soon as the file is on
the server, and the controller can reach the server, choose COMMANDS > Download File, as shown in Figure 19-5 You see the File Type drop-down The file type is Code.
Next, enter the IP address of the TFTP server, as well as the file path and filename Click
Download to begin the process.
Key
Topic
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Trang 8Figure 19-4 AP Hardware Version
Figure 19-5 Upgrade the Controller via the Web Interface
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Figure 19-6 Verify the Upgrade of the Controller
Note The ping utility is a Windows function, not a function or utility in WCS To access
the ping utility, you need to open a command prompt in Windows and enter the ping
com-mand followed by the address you want to ping
As the transfer begins, the page continues to refresh every few seconds The controller copies the file to RAM When it’s finished, the controller puts the file in flash The exist-ing image then becomes the backup image As soon as the transfer is complete, you need
to reboot the controller You can click the link displayed on the Download file to Con-troller page This redirects you to the Reboot page
After the reboot, log back in, and verify that the new code has been transferred As shown
in Figure 19-6, the software version has been successfully upgraded
Upgrade Using WCS
You can also use WCS to upgrade the controller Upgrading the controller also upgrades the APs, because they sync to the same code To perform the upgrade, follow these steps:
Step 1. Verify connectivity before you start the upgrade process Use the ping utility
from the WCS to be sure that the WCS server can contact the controller Also,
if you use an external TFTP server, ping it as well
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Trang 10Step 2 Click Configure > Controllers to navigate to the All Controllers page.
Step 3 Select the check box of the controller you want to upgrade Choose Select a
Command > Download Software, and click GO WCS displays the Download
Software to Controller page
Step 4 If you use the built-in WCS TFTP server, check the TFTP Server on WCS
Sys-tem check box If you use an external TFTP server, uncheck this check box and
add the external TFTP server IP address
Step 5 Click Browse and navigate to the software update file The files are uploaded
to the root directory that was configured for use by the TFTP server You can change to a different directory
Note You should always double-check the software file you plan to use for your con-troller Selecting the wrong file can cause problems Be sure that you have the correct soft-ware file for your controller
Step 6 Click Download WCS downloads the software to the controller, and the
con-troller writes the code to flash RAM As WCS performs this function, it dis-plays its progress in the Status field
Upgrading an AP
Upgrading an AP is pretty easy In fact, if you followed the process described in the pre-ceding section, you are already done, because the AP synchronizes to the controller Re-call that in Figure 19-3 you verified the version of AP software, and it was the same as the controller—version 4.1.192.17M (Mesh) After upgrading the controller to software
ver-sion 5.0.148.0, you can again verify the client by choosing WIRELESS > All APs and
clicking the AP name that you want to verify In Figure 19-7, the Lobby-AP has been se-lected According to the information in the Software Version field, it has been upgraded to version 5.0.148.0, matching that of the controller Remember that after upgrading the soft-ware on the controller, the APs automatically upgrade their softsoft-ware as well, but only 20 APs can upgrade at any given time
Remember that APs synchronize to the controller This means the following:
■ If the controller is a higher version, the AP upgrades
■ If the controller is a lower version, the AP downgrades
■ If the AP leaves one controller and associates with another, the AP checks the con-troller version and upgrades/downgrades as needed
Key Topic