User`s guide

Downloading Firmware
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112 TCP/IP AXEL Platine Terminal
IMPORTANT: The AX3000 IP layer, used for the tftp protocol, does not handle
the fragmentation/defragmentation process. Therefore, if a router fragments
frames (mtu lower than 600 bytes), the AX3000 will not be able to perform the
download.
If any problems occur, refer to Section 11.4.
11.3 - DOWNLOADING BY BOOTP AND TFTP PROTOCOLS
This procedure is divided into 2 steps:
-
bootp
: asking for firmware file information,
-
tftp
: downloading firmware file.
The
bootp
protocol is used get the location (IP address of the
tftp
host and
filename) of the firmware file. This information is obtained by means of a
broadcast.
Information concerning this firmware file must have been configured within
UNIX. The host selected for this function is known as the bootp host.
Note: the
bootp
host and the
tftp
host can be different machines.
Prerequisites for
bootp
:
- the
bootpd
process must be run on the
bootp
host.
- the
bootpd
configuration file (
/etc/bootptab
) must list an entry for
every AX3000 which can download firmware.
- the
bootp
host must be directly accessed by the AX3000 (not via a
router). Otherwise a
bootp relay
host must be set up.
The main capabilities of the
bootpd
configuration file are as follows:
-
tc
: network description
-
ht
: network type
-
sa
: IP address of tftp host
-
sm
: network mask
-
gw
: optional router
-
vm
: magic number (use only for a router)