BelAir20E User Guide
BelAir20E Auto-configuration
April 2, 2012
Confidential
Document Number BDTM02201-A01 Standard
BelAir20E Auto-configuration
With auto-configuration, the BelAir20E can automatically obtain a script file
after it powers up. The unit then configures itself based on the content of the
file. Auto-configuration minimizes the amount of manual intervention required
to pre-configure the unit before you install it. To create a valid script file, refer
to the guidelines listed in
“Creating and Using Script Files” on page 56
.
The following sections describe the different ways you can automatically supply
a script file to the BelAir20E:
•
•
•
“Configuration Download Profile” on page 62
All methods are independent, but can be used in conjunction with each other.
For example, you can use DHCP options to download a script file that
configures the configuration download profile. You then use the configuration
download profile to download a second script file for the rest of the BelAir20E.
DHCP Options
With this method, the BelAir20E uses the exchange of DHCP packets with a
DHCP server as a means of exchanging information during startup. The
BelAir20E uses DHCP Options 12, 60, 55 and 43 to retrieve extra information
during startup and to supply the DHCP server with information about itself.
The BelAir20E provides the system identifier host name through DHCP
Option 12 and the vendor class identifier
BelAir Networks
through DHCP
Option 60.
Through DHCP Option 55, the DHCP server provides the BelAir20E with the
following parameters in addition to basic IP parameters (address, subnet mask
and default route) described in
“Configuring Dynamic IP Addressing” on
• TFTP server IP address and script file name. These parameters cause a TFTP
session to be created and the script file to be downloaded and executed
during startup.
• DNS domain name. Only one domain name is valid at any one time per
BelAir20E and not per interface. See
