Quanta Cloud Technology QuantaMesh QNOS5, Configuration Manual

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The Auto Install feature can automatically update the firmware image and obtain configuration information
when the switch boots. Auto Install begins the automatic download and installation process when the switch
boots and loads a saved configuration that has the persistent Auto Install mode enabled. Additionally, the
switch supports a non-persistent Auto Install mode so that Auto Install can be stopped or restarted at any
time during switch operation.
6.2.1. DHCP Auto Install Process
The switch can use a DHCP server to obtain configuration information from a TFTP server. DHCP Auto Install
is accomplished in three phases:
1. Assignment or configuration of an IP address for the switchp
2. Assignment of a TFTP server
3. Obtaining a configuration file for the switch from the TFTP server
Auto Install is successful when an image or configuration file is downloaded to the switch from a TFTP server.
Note: The downloaded configuration file is not automatically saved to startup-config. You must
explicitly issue a save request (
copy running-config startup-config
) in order to save the configuration.
6.2.1.1. Obtaining IP address Information
DHCP is enabled by default on the service port. If an IP address has not been assigned, the switch issues
requests for an IP address assignment.
A network DHCP server returns the following information:

IP address and subnet mask to be assigned to the interface

IP address of a default gateway, if needed for IP communication
6.2.1.2. Obtaining Other Dynamic Information
The following information is also processed and may be returned by a BOOTP or DHCP server:

Name of configuration file (the file field in the DHCP header or option 67) to be downloaded
from the TFTP server.

Identification of the TFTP server providing the file. The TFTP server can be identified by name
or by IP address as follows:
– Host name: DHCP option 66 or the sname field in the DHCP header
– IP address: DHCP option 150 or the siaddr field in the DHCP header
When a DHCP OFFER identifies the TFTP server more than once, the DHCP client selects one of the options
in the following order:
sname , option 66, option 150, siaddr . If the TFTP server is identified by host name, a
DNS server is required to translate the name to an IP address.