Cisco Cisco SG200-26P 26-port Gigabit PoE Smart Switch Manuel De Maintenance

File Management

Cisco Small Business SF200E Series Advanced Smart Switch

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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 (boot file or option 67) to be downloaded 
from the TFTP server. 

•

The identification of the TFTP server from which to obtain the boot file. 

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. 
This hostname is also displayed in the CLI prompt.

On the DHCP Auto Configuration page, you can configure an alternate TFTP 
server and 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, the switch sends broadcast TFTP requests for the file name in the DHCP 
message, if given. Otherwise, the switch enters default network configuration 
mode process described in the 

 section.