Cambium Networks PTP 450 Series, Configuration Manual

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Chapter 1: Configuration Zero Touch Configuration Using DHCP Option
66
Page
1-262
Zero Touch Configuration Using DHCP Option 66
This feature allows an SM to get its configuration via DHCP option 66. This can be used for the initial
configuration of an SM as well as managing the configuration of SMs on an ongoing basis. Here is how it
works in brief:
•
When the SM boots up, if it is set to use DHCP client, it will send out a DHCP Discover packet which
includes a request for DHCP Option 66.
• In case of a brand new SM out of the box, the DHCP Discover packet is sent out if the SM connects
to an AP using Installation Color Code (ICC), even though DHCP client is not enabled in factory
default config.
•
An appropriately configured DHCP server will respond with a DHCP Offer and include a URL in
response to the Option 66 request. The URL should point to the configuration file.
• The device will download the configuration file and apply it. The device will reboot automatically if
needed. (Note: this requires “rebootIfRequired” flag to be added to the config file. See
Creating a
Golden config file on page 1-263 .
Configuration Steps
Procedure 15 Zero Touch Configuration steps
1 Create the golden config file(s)
2 Host it on an TFTP/FTP/HTTP/HTTPS server
3 Configure the DHCP server to return the URL of the golden config file in option 66
When the SM boots up, it will get the URL for the golden config from the DHCP server via option 66,
download it and apply it.
If all the SMs are configured exactly the same, then you can create just new golden config file that can
be used with all SMs.
If the SMs are not configured the same, see if it is possible to group the SMs such that SMs with the
same configuration are served by the same DHCP pool. User can then create multiple golden config files
and configure the DHCP server to use the appropriate config file for each pool.
User can also create one config file per SM. This provides the most flexibility, but is practical only if you
have a software tool/script to generate the config files for each MAC address. The files should be
named <mac>.cfg where <mac> is the MAC address of the SM, and stored in the same directory on the
file server. The DHCP server should be configured to return the directory name ending with a ‘/’ in
option 66. The SM will automatically add “<mac>.cfg” to the path and get its config file.
If some configuration is unique per SM, but rest of the configuration is common, the SMs can be staged
with the unique part, and use option 66 to manage the common part. For example, if each SM needs to
have its coordinates set, don’t include the coordinates in the golden config file. Instead, configure the
coordinates for each SM manually. Manage the rest of the configuration using DHCP option 66.