Cisco Small Business 200 Series Administration Manual page 53

Administration: File Management
Auto Configuration/Image Update via DHCP
- When DHCPv6 messages are received from the server (for example, when you press the Restart
button on IPv6 Interfaces page,
- When DHCPv6 information is refreshed by the device.
- After rebooting the device when stateless DHCPv6 client is enabled.
• When the DHCPv6 server packets contain the configuration filename option.
• The Auto Image Update process is triggered when an indirect image file name is provided by the
DHCP server or a backup indirect image file name has been configured. Indirect means that this is
not the image itself, but rather a file that holds the path name to the image.
Ensuring Correct Performance
To ensure that the Auto Configuration/Image Update feature works correctly, note the following:
• A configuration file that is placed on the TFTP/SCP server must match the form and format
requirements of the supported configuration file. The form and format of the file are checked, but the
validity of the configuration parameters is not checked prior to loading it to the Startup Configuration.
• In IPv4, to ensure that a device downloads the configuration and images file as intended during the
Auto Configuration/Image Update process, it is recommended that the device is always assigned
the same IP address. This ensures that the device is always assigned with the same IP address, and
obtains the same information used in Auto Configuration/Image Update.
DHCP Auto Configuration/Image Update
The following GUI pages are used to configure the device:
• Administration > File Management > DHCP Auto Configuration/Image Update—To configure the
device as a DHCP client.
• Administration > Management Interface > IPv4 Interface (In L2) or IP Configuration > IPv4
Management and Interfaces > IPv4 Interfaces (in L3)—To renew the IP address through DHCP when
the device is in Layer 2 system mode.
Default Settings and Configuration
The following defaults exist on the system:
• Auto Configuration is enabled.
• Auto Image Update is enabled.
• The device is enabled as a DHCP client.
Cisco Small Business 200 Series Smart Switch Administration Guide
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