Sagemcom Fast 3890 support

[cocus]

Hello, this is a general request, not only for bcm2-utils. I have a FAST3890 here, I've found that it has two uarts (I think?) but I can't get into any bootloaders. I only see a GO! and then a kernel boot.
Even if I keep pressing a key (enter, spacebar, etc), nothing changes. I think the serial is disabled, OR it's not on that port. I checked the solder and it's not shorting anything, it just doesn't accept my input.
On the logs, it reaches to a login from a yocto build, which could accept input, but doesn't. The log continues, finishing in bfcSerialConsoleMode set to disabled, disabling console. Goodbye....

log-truncated.txt

Using the "dump" feature and the ip of the device DOESN'T work! (I guess telnet is not enabled).

What can I do in this scenario? Thank you!

[jclehner]

Try disconnecting the coax, and resetting the device to factory defaults. If this enables SNMP access, you might be able to enable the CM console (bfcSerialConsoleMode.0):

$ snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.4413.2.2.2.1.9.1.2.1.0 i 0 
$ snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.4413.2.2.2.1.9.1.2.1.0 i 2 

[cocus]

Sorry for the delay, the modem is disconnected from the coax cable, no factory defaults restored, and snmpset times out.
Tried factory reset the modem from within the web gui (using the standard login of custadmin/f4ast3890), it does factory reset, but now the login is different (probably the one in the label, which I don't have at the time), but running snmpset still times out.

EDIT: the default login is now admin/admin. Still, snmpset doesn't like it.

[jclehner]

Does the web gui have an option for disabling the firewall? That's neccessary on some devices for SNMP to work. Also, try both 192.168.100.1 and the router's LAN address (usually 192.168.0.1).