Managing System Files
DHCP Auto Configuration
Cisco Small Business 200 Series Smart Switch Administration Guide 41
4
Triggering DHCP Auto Configuration
The Auto Configuration process is triggered in the following cases:
• After reboot when an IP address is allocated or renewed dynamically (using
DHCP).
• Upon an explicit DHCP renewal request and if the switch and the server are
configured to do so.
• Upon automatic renewal of the DHCP lease.
Server Name/Address
You can specify the IP address or the name of the TFTP server. This server is used
if no server IP address was specified in the DHCP message. This DHCP message
is the DHCP offer message coming from the DHCP server. Possible options are
bootp options sname and siaddr and DHCP option 150 or option 66. This is an
optional parameter.
Backup Configuration File Name
You can specify the backup configuration filename. This file is used if no filename
was specified in the DHCP message. This is an optional parameter.
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 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 server address parameter is empty then the Auto Configuration
process is halted.
NOTE In the previous two bullets, the IP address refers to the IP address or
hostname of the TFTP server.
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