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Administration
File Management
Cisco Small Business SG200 Series 8-port Smart Switches Administration Guide
When option 3 occurs, the switch looks for the TFTP server and Startup
Configuration file as described in
DHCP Server Message Details
Any of the following fields might be returned by a BOOTP or DHCP server and
processed by the switch:
•
The name of the configuration file (bootfile or option 67) to be downloaded
from the TFTP server.
•
The identification of the TFTP server from which to obtain the bootfile.
The TFTP server IP address can be deduced from the multiple sources in a
DHCP reply. The switch makes its selection based on the following criteria,
from the highest priority to the lowest:
1. The sname field in a DHCP or BOOTP reply.
2. The TFTP server name (option 66) field in a DHCP reply.
3. The TFTP server address (option 150) field in a DHCP reply.
4. The siaddr field of a DHCP or BOOTP reply.
If only the sname or option 66 values are returned to the switch, a DNS
server is needed to resolve the IP address of the TFTP server. After an IP
address is assigned to the switch, if a hostname is not already assigned,
Auto Configuration sends a DNS request for the corresponding hostname.
Alternate TFTP Server and File Name
On the DHCP Auto Configuration page, you can configure an alternate TFTP
server and configure file name to be used when the server or file name provided
by the DHCP server cannot be located. The following procedure is followed:
1. The switch sends unicast messages to the TFTP server identified through
DHCP, if provided.
2. If the DHCP information is not provided or the server or file name cannot be
found, then the server uses the alternate information, if configured.
3. If the alternate information is not configured or the server or file name cannot be
found, then the switch sends broadcast messages to the TFTP server identified
through DHCP.
Default Network Configuration
4
File.
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