Cisco 500 series Administration Manual page 58

Managing System Files
DHCP Auto Configuration
Cisco 500 Series Stackable Managed Switch Administration Guide
Auto Configuration Process
When the Auto Configuration process is triggered, the following sequence of
events occurs:
• The DHCP server is accessed to acquire the TFTP/SCP server IP address
and configuration file name. These parameters are passed in the DHCP
option parameters.
• If an IP address was not supplied by the DHCP server, the backup server
address is used (if configured by the user).
• If the IP address was not supplied by the DHCP server and the backup
TFTP/SCP server address parameter is empty then the Auto Configuration
process is halted.
In the previous two bullets, the IP address refers to the IP address or
NOTE
hostname of the TFTP or SCP server.
• If the configuration filename was supplied by the DHCP server, then the
copy protocol (SCP/TFTP) is selected as described in
Configuration.
• When downloading using SCP, the device accepts any specified SCP/SSH
server (without authentication) if either of the following is true:
- The SSH server authentication process is disabled. Note that by default
the SSH server authentication is disabled in order to allow downloading
configuration file for devices with factory default configuration (for
example out-of-box devices).
- The SSH Server is configured in the SSH Trusted Servers list.
If the SSH server authentication process is enabled, and the SSH server is
not found in the SSH Trusted Servers list, the Auto Configuration process is
halted.
• If a configuration filename was not supplied by the DHCP server, the
backup configuration file name is used.
• If the configuration filename was not supplied by the DHCP server and the
backup configuration file name is empty, the Auto Configuration process is
halted.
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DHCP Auto
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