The hostname of the TFTP server (option 66 or sname). 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 (siaddr) to be used for Auto Config requests.

No configuration assigned by BOOTP or DHCP is saved in startup-config.

A DNS server is needed to resolve the IP address of the TFTP server only if the sname or option 66 values are used.

Obtaining a Config File

After obtaining IP addresses for both the switch and the TFTP server, the Auto Config process attempts to download a configuration file. When possible, a host-specific configuration file is downloaded. Otherwise, a network configuration file is used to get the final configuration. The process is described below.

The switch attempts to download a host-specific configuration file if a bootfile name was specified by the DHCP or BOOTP server. The switch makes three unicast TFTP requests for the specified bootfile. If the unicast attempts fail, or if a TFTP server address was not provided, the switch makes three broadcast requests to any available TFTP server for the specified bootfile. A TFTP broadcast request is a simple TFTP request with broadcast destination MAC address (ff:ff:ff:ff:ff:ff) and destination IP address (255.255.255.255).

NOTE: The bootfile is required to have a file type of *.cfg.

Attempts are made to download a default network configuration file with the name "fp-net.cfg" when:

the host-specific bootfile cannot be found.

a failure occurs in the host-specific configuration file download.

the switch was not provided a specific bootfile name by the DHCP server.

The switch unicasts or broadcasts TFTP requests for a network configuration file in the same manner as the attempts to download a host-specific configuration file.

The default network configuration file should have IP address to hostname mappings using the command ip host <hostname> <address>. If the default network configuration file does not contain the switch's IP address, the switch uses DNS to attempt to resolve its hostname.

A sample fp-net.cfg file follows:

config

...

ip host switch_to_setup 192.168.1.10 ip host another_switch 192.168.1.11

... <other hostname definitions> exit

Utility

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Dell 6200 SERIES manual Obtaining a Config File, 163

6200 SERIES specifications

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