ADC CRA-C Manuel D’Utilisation

C

Image File
Name

Read-only parameter.  The name must match the name
of a file on the TFTP server for an image file download
to occur.

D

Image Load
Mode

Specifies how the Ethernet bridge code is loaded.  The
Megabit Modem CRA-C supports both local and remote
loading.  Local image code is contained in flash devices
for local loading of operation code.  When loading over
the network, use BOOTP (RFC 951) TFTP (RFC 783) to
obtain image files.

Set Local (default) to load the image file from the
application sector of the Megabit Modem CRA-C
non-volatile device, if valid.  The code is valid if the
CRC calculated on power-up matches the expected
CRC.  If it does not, the Megabit Modem CRA-C
attempts to get a new image via the TFTP.

Set Network (with local backup) to attempt to download
the image file over the network.  It first issues a BOOTP
request to get the image filename and image server IP
address, then it initiates a TFTP session.  If the BOOTP
fails, the TFTP fails, or the downloaded image is
invalid, the image file is loaded using the local image
mode.

If no image is loaded after cycling through the TFTP
process at least five times, the Megabit Modem CRA-C
resets and repeats the process.

E

Packet
Encapsulation

Indicates the encapsulation format used to envelope the
Ethernet packets over ADSL.  Choices are HDLC
(default) and PPP.