Use the Auto Install Configuration
19
M4100 Series Switches
- The address of the TFTP server (siaddr) to be used for Auto Install requests.
You can also enter this information manually.
No DHCP configuration is saved in the startup-config file.
About Conflicting TFTP Server Configurations
The TFTP server IP address can be deduced from the multiple sources. It is selected from
one of the following fields, listed from the highest priority to the lowest:
• The sname field of a DHCP reply
• The TFTP server name (option 66) of a DHCP reply
• The TFTP server address (option 150) field of a DHCP reply
• The siaddr field of a DHCP reply
About DNS Server Requirements
A DNS server is required to resolve the IP address of the TFTP server only if the sname or
option 66 value is used.
About Obtaining a Configuration File
After obtaining IP addresses for both the switch and the TFTP server, the Auto Install process
attempts to download a configuration file. A host-specific configuration file is downloaded, if
possible. Otherwise, a network configuration file is used as a bridge to get the final
configuration. For more information, see Host-Specific Configuration File on page 19 and
Default Network Configuration File on page 20.
Host-Specific Configuration File
If the DHCP server specifies a bootfile name, the switch attempts to download a host-specific
configuration file. The switch makes three unicast TFTP requests for the specified bootfile. If
the unicast attempts fail, or if a TFTP server address was not provided, the Auto Install
process stops. No broadcast attempts are made.
Note: The bootfile is required for a file type of *.cfg. The bootfile cannot be
named fastpath.cfg, startup-config, or hpc_broad.cfg.
These names are reserved.
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