Dell PowerConnect M6220 - Manual (Page 238)

236 Configuring System Information
– Startup Config — The startup configuration file.
– Backup Config — The backup configuration file.
• Restore Configuration Factory Default — Select the radio button and click Apply Changes to restore
all configuration structures to the defaults.
Defining Advanced Settings
Use Advanced Settings to set miscellaneous global attributes of the device. The changes to these
attributes are applied only after the device is reset. Click System > Advanced Settings in the tree view to
display the Advanced Settings page.
The Advanced Settings page contains a link for configuring Auto Configuration.
Auto Configuration
The Auto Configuration feature enables the configuration of a switch automatically when the device is
turned on and, during the boot process, no configuration file is found in device storage. By
communicating with a DHCP server, obtains an IP address for the switch and an IP address for a TFTP
server. Auto Configuration attempts to download a configuration file from the TFTP server and install it
on the switch.
The DHCP server that the switch communicates with must provide the following information:
• The IP address and subnet mask (option 1) to be assigned to the switch.
• The IP address of a default gateway (option 3), if needed for IP communication.
• The identification of the TFTP server from which to obtain the boot file. This is given by any of the
following fields, in the priority shown (highest to lowest):
–
The sname field of the DHCP reply.
– The hostname of the TFTP server (option 66). Either the TFTP address or name is specified—not
both—in most network configurations. If a TFTP hostname is given, a DNS server is required to
translate the name to an IP address.
– The IP address of the TFTP server (option 150).
– The address of the TFTP server supplied in the siaddr field.
– The name of the configuration file (boot file or option 67) to be downloaded from the TFTP
server. The boot file name must have a file type of *.cfg.
• The IP addresses of DNS name servers (option 6). The IP addresses of DNS name servers should be
returned from the DHCP server only if the DNS server is in the same LAN as the switch performing
Auto Configuration. A DNS server is needed to resolve the IP address of the TFTP server if only the
“sname” or option 66 values are returned to the switch.
After obtaining IP addresses for both the switch and the TFTP server, the Auto Configuration feature
attempts to download a host-specific configuration file using the boot file name specified by the DHCP
server. If the switch fails to obtain the file, it will retry indefinitely.