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Megabit Modem CRA-C User Manual 37
Table 11.
Router Configuration (continued)
T
yp
e
No.
For Option Function
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
S
p
ecifies how the Ethernet brid
g
e code is loaded. The
Me
g
abit Modem CRA-C su
pp
orts both local and remote
loadin
g
. Local ima
g
e code is contained in flash devices
for local loadin
g
of o
p
eration code. When loadin
g
over
the network, use BOOTP (RFC 951) TFTP (RFC 783) to
obtain ima
g
e files.
Set Local (default) to load the ima
g
e file from the
a
pp
lication sector of the Me
g
abit Modem CRA-C
non-volatile device, if valid. The code is valid if the
CRC calculated on
p
ower-u
p
matches the ex
p
ected
CRC. If it does not, the Me
g
abit Modem CRA-C
attem
p
ts to
g
et a new ima
g
e via the TFTP.
Set Network (with local backu
p
) to attem
p
t to download
the ima
g
e file over the network. It first issues a BOOTP
re
q
uest to
g
et the ima
g
e filename and ima
g
e server IP
address, then it initiates a TFTP session. If the BOOTP
fails, the TFTP fails, or the downloaded ima
g
e is
invalid, the ima
g
e file is loaded usin
g
the local ima
g
e
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.