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Megabit Modem CRA-C User Manual 33
Table 10.
Bridge Configuration (continued)
T
yp
e
No.
For Option Function
9 Image File
Name
Read-only value. This parameter can be configured
only in the BOOTP configuration file and is acquired
when Boot Mode and Image Load Mode are set to
network. This name must match the name of a file
on the TFTP server in order for an image file download
to occur.
A Image Load
Mode
Specifies how the operational image code is loaded for
the Ethernet bridge. 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) and 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 using 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.
B Packet
Encapsulation
Indicates the format used to encapsulate the Ethernet
packets over ADSL. Choices are HDLC (default)
and PPP.