Kontron NetBootLoader - Manual (Page 13)

ID 1022-8317, Rev. 2.0
NBL Operation NetBootLoader
Page 5
2.2.1 DHCP/ BOOTP Server Access
Use of this access method requires the availability of either a DHCP or BOOTP server in the
same network as the NetBootLoader. The DHCP command causes the NetBootLoader to first
attempt to establish contact with a DHCP server. If contact is not achieved, it then tries to con-
tact a BOOTP server. When contact is established, parameters required by the NetBootLoader
are provided accordingly and the Ethernet port is configured and then made available for nor-
mal operation.
In the event the NetBootLoader is reset or cold started the configuration parameters set by the
above method are lost. Only if the parameters have been set by the NET command are they
still available.
Some products require that prior to using the DHCP command, the IP address of the CPU mod-
ule be set to 255.255.255.255 using the NET command.
2.2.2 TFTP/FTP Server Access
The NetBootLoader provides various functions for interfacing with either a TFTP or FTP server.
The TFTP server access is a simple method of acquiring a userimage from a remote source.
Its primary use is to download a single executable image from a given source. For example,
once an image has been created it would be possible to store it at a remote location where it
then would be available for remote booting of an CPU module via an Ethernet port.
The TFTP/FTP server commands provide various functions consistent with interfacing with
such a server.
2.2.3 Remote Access
All products supported by the NetBootLoader may be remotely accessed via telnet. In addition
to telnet, the AM4100 and AM4101 also support Serial Over LAN for remote access to the
NetBootLoader. This requires appropriate software running at the remote location, for example,
“ipmitool”.
In the case of Serial Over LAN, the NetBootLoader supports RMCP only. RMCP+ is not sup-
ported.
2.3 NBL Flash Operation
The NetBootLoader provides various functions for performing operations with the NBL Flash
memory. The following table provides an overview of the available NBL Flash memory opera-
tion functions.
Table 3: NBL Flash Operation Commands
CMD TITLE ALIAS FUNCTION REMARKS
CHECK - Image validation; displays informa-
tion for each image Verifies validity of user image programmed
to NBL Flash memory
CLONE - Program NetBootLoader to NBL
Flash memory Uses data buffer or redundant NBL Flash as
source
LF Load Flash Program image to NBL Flash
memory Uses data buffer as source