Administrator Guide
NOTE: If you want to do an update with the Preserve
changes option enabled, ensure that your addons folder
includes a copy of your current add-ons. The system may
require two reboots to fully update the rmware and add-
ons while preserving local changes.
Be sure to create/activate the two required MIME Types— .ini and .,under IIS on a per site basis to enable downloading. Also be sure
your Web server can identify the le types used by Dell thin clients.
3 On your IIS server, use the File Types menu to add a New Type.
4 In the File Type dialog box, Use the following details :
a To create/activate the .ini MIME Type—Enter the Associated extension .ini and Content type (MIME) text/plain.
b Click OK to apply the settings.
c To create/activate the . MIME Type—Enter the Associated extension . and Content type (MIME) text/plain.
d Click OK to apply the settings.
For detailed instructions on adding the .ini and . MIME Types, see Knowledge Base Solution #21581 , go to www.dell.com/wyse/
knowledgebase and search for 21581.
Directing the thin client to the server
After you set up the folder structure and populate it with the correct les, direct the thin client to the location of the server by the
following way:
• DHCP
IMPORTANT
: We recommend you use DHCP to direct the thin client to Server.
To direct the thin client to the server:
Using DHCP — When using DHCP to direct the thin client to the location of the server, information about the server and root
directory is obtained from the following DHCP options:
a 161 — The server.
b 162 — Root path to the server-ftp/http/https.
• If no root path is dened, /wyse is assumed
• If a root path is dened, the additional path will be appended to the URL supplied by option 161.
c 184 — Server username to the server specied in option 161. This is optional.
d 185 — Server password to the server specied in option 161. This is optional.
IMPORTANT
:
Check-in for rmware updates is done early in the boot process. For that reason, changes in DHCP information may not be
propagated to a unit until a full boot is completed. However, you can avoid this by forcing a renewing of the DHCP lease, which
makes sure that the unit has the latest le-server location before the next rmware check.
Simply, right-click the Network Manager icon, click Enable Networking to disable it, right-click the Wireless Manager icon, and
then click Enable Networking to enable it again and the DHCP lease is renewed.
For general instructions on adding DHCP Options #161 and #162, see Knowledge Base Solution #16132, go to www.dell.com/wyse/
knowledgebase and search for 16132.
After you start your thin client, the device will look in the dened root path for the latest available image and update if necessary.
Additionally, it will check the directory le in the add-ons folder to see if any updates for installed add-ons are dened. Add-ons that exist in
the addons folder but are not listed in the directory le, will be ignored during update check-in.
Central
conguration—Automating updates and congurations 99