Cisco SG200 Series Administration Manual page 61

Administration
File Management
NOTE
Cisco Small Business SG200 Series 8-port Smart Switches Administration Guide
When a hostname has been determined, the switch issues a TFTP request for a file
named "<hostname>.cfg", where <hostname> is the first eight characters of the
switch hostname.
The switch uses the IP address to do a DNS reverse name lookup. For example, if
the switch IP address is 192. 1 68. 1 . 1 0, the hostname becomes switch_t.cfg (the
first eight characters in the example above).
The default switch name is derived as switch+last 6 digits of hex address. The
mapping file should have the hostnames such as ip host switchD99FA5
192.168.1.10. Then, the hostname learned for the <hostname.cfg> is
switchD9.cfg for the switch having the IP address 192.168.1.10.
If the switch is unable to map its IP address to a hostname, Auto Configuration
sends TFTP requests for the default configuration file host.cfg.
When the switch gets the default configuration file, the configuration is validated
for errors. If the validation is successful, then the switch copies the configuration to
the Startup Configuration file type and reboots. In this case, the default
configuration file name is not stored in the non-volatile memory.
If the switch is unable to get the valid configuration file, then the process described
above is repeated every 20 minutes until the switch gets a valid configuration file.
The administrator can create a Startup Configuration file by manually saving the
Running Configuration. The administrator can also disable Auto Configuration if
desired.
The following table summarizes the configuration files that can be downloaded,
and the order in which they are sought.
Order File Name
Sought
1 <bootfile>.cfg
2 fp-net.cfg
3 <hostname>.cfg
4 host.cfg
1. This file name might be learned through DHCP or manually configured, as described in
Alternate TFTP Server and File
Description
Host-specific configuration file,
ending in a *.cfg file extension
Default network configuration file
Host-specific configuration file,
associated with hostname
Default configuration file
Name.
4
Final File
Sought
Yes
1
No
Yes
Yes
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