Dell PowerConnect 6248 Configuration Guide - Page 163
ip host, hostname, address, Obtaining a Config File
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- 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 . 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 ... exit Utility 163