Dell N3200-ON EMC Networking N-Series Switches User Guide version 6.6.3 - Page 584

configuration file with the name dell-net.cfg. The switch unicasts or broadcasts TFTP requests for a network configuration file in the same manner as it attempts to download a host-specific configuration file. The network configuration file consists of a set of IP address-to-hostname mappings, using the command ip host hostname address. The switch finds its own IP address, as learned from the DHCP server, in the configuration file and extracts its hostname from the matching command. If the default network configuration file does not contain the switch's IP address, the switch attempts a reverse DNS lookup to resolve its hostname. A sample dell-net.cfg file might appear as follows: config ... ip host switch1 192.168.1.10 ip host switch2 192.168.1.11 ... exit If a hostname has been identified in the network configuration file or in the DHCP offer, the switch issues up to three TFTP requests for a host configuration file named hostname.cfg , where hostname is the first thirty-two characters of the switch's hostname. If the switch is unable to map its IP address to a hostname, or no prior host configuration file has been downloaded, Auto Configuration sends up to three TFTP requests for the generic host configuration file host.cfg. Table 14-1 summarizes the config files that may be downloaded and the order in which they are sought. A Yes in the Final File Sought column means that a successful download terminates the Auto Configuration process. Table 14-1. Configuration File Possibilities Order File Name Sought Description Final File Sought 1 .cfg Host-specific config file from DHCP Yes option 67, ending in a *.cfg file extension 2 dell-net.cfg Default network config file No 3 .cfg Host-specific config file, associated with Yes hostname. 584 DHCP and USB Auto-Configuration