Thread: Cable Modem 4200i with 0.4.9.6 Firmware help


Forum: General Cable Discussion

Hi, looking for a method to change the firmware on this modem, I already have the firmware etc, it will not netboot because of the firmware currently installed.

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  1. #1
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    Cable Modem 4200i with 0.4.9.6 Firmware help

    Hi, looking for a method to change the firmware on this modem, I already have the firmware etc, it will not netboot because of the firmware currently installed.



  2. #2
    DW Contributor gentlex's Avatar
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    u can use bit file method or max232 in to change the firmware

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    Cant be bothered with jtag unless absolutely no choice, whould rather use bit file method, I have the bit file but cant seem to find the snmpset utility, is there a download for that on this site ?

    Also could do with a tutorial on how to use the bit file, have read about 10,000 articles on loads of different forums but cant seem to find a tutorial at all.

    Help

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    DW Contributor gentlex's Avatar
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    here u go m8
    1. download and install net-snmp-5.4.0-1.win32 from http://www.net-snmp.org/download.html
    2. set the ip of your pc to 192.168.100.10, netmask 255.255.255.0 and def.gateway to 192.168.100.1

    3. look up the hfc mac of your cable modem usually @ the back of the modem or by going to http://192.168.100.1/address.html and convert it to integer as follows: for example if your mac is 00:11:1A:02:CD:14 take the last 4 values and remove the colons resulting in 1A02CD14

    4. start windows calculator (calc.exe) and select scientific from the view menu

    5 select Hex and enter the value 1A02CD14, now select Dec and note down the integer value (436391188 )

    6. start your tftp server or use tftpd32.exe located in the in the folder as well.also make sure the .bit file egsb4100.bit, sb4200.bit..) of your modem it located in the tftp root directory of your TFTP client.

    7. open a dos cmd window 8. issue following command:
    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.3.1.18.0 i (add the numbers u got from windows calculator here )-so it looks like this

    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.3.1.18.0 i (436391188)
    9. observe which file the modem tries to tftp if should get sb4100.bit if u doing a 4100 …and if write your modem should reboot.
    10.once modem has rebooted keep ip the same and close tftpd32.exe
    11.open cmfirm3.exe and make sure in the
    cm address is set to 192.168.100.1
    community is set to plublic
    fireware server is set to 192.168.100.10
    firmware file select the firmware u want to put on the modem eg: SB4100-0.4.4.5-SCM01-NOSH-2.03.hex.bin
    and the base directory point it to where the SB4100-0.4.4.5-SCM01-NOSH-2.03.hex.bin is located
    then press start then wait till the modem as rebooted then goto 192.168.100.1 you should see the hack tab that it ur done

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    done everything you say above. The bit files get loaded by tfpt and then the modem reboots. I then close tftp and try and use cmfirm3.exe but is say

    Pinging Cable Modem.....Please Wait
    Reply from 192.168.100.1 took 0 milliseconds
    Setting TFTP IP Address 192.168.100.10 on Cable Modem.
    Error: No Such Name

    What do you think is wrong? I'm currently on firmware SB4100-0.4.9.6-SCM01-NOSH. Also used this command line at DOS prompt

    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.3.1.18.0 i 1079138078

    Any know the answer to this because I've spent 6 hours trying this out only to become stuck and have no idea and I think I'm going to give up soon.
    Last edited by bertybassett; 18th September 2007 at 08:47.

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    DW Contributor gentlex's Avatar
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    make sure the community is set to public and the addresses r correctly and the port is set to 161 eg;
    cm adress = 192.168.100.100.1
    firmware server =192.168.100.10

    also make sure in the firmware file box is SB4100-0.4.4.5-SCM01-NOSH-2.03.hex.bin and the base directory is pointing to the cmfirm folder and the SB4100-0.4.4.5-SCM01-NOSH-2.03.hex.bin file is jn the cmfirm3 folder
    Last edited by gentlex; 18th September 2007 at 01:20.

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    checked all that and still getting

    Pinging Cable Modem.....Please Wait
    Reply from 192.168.100.1 took 0 milliseconds
    Setting TFTP IP Address 192.168.100.10 on Cable Modem.
    Error: No Such Name

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    after the dos command I get

    SNMPv2-SMI::enterprises.1166.1.19.3.1.18.0 = INTEGER: 1079138078

    appear and this from tftp

    Read request for file <SB4100.bit>. Mode octet [18/09 09:01:22.234]
    Using local port 1207 [18/09 09:01:22.234]
    <SB4100.bit>: sent 0 blk, 0 bytes in 1 s. 0 blk resent [18/09 09:01:23.234]
    Read request for file <SB4100.bit>. Mode octet [18/09 09:01:23.250]
    Using local port 1208 [18/09 09:01:23.250]
    <SB4100.bit>: sent 1 blk, 124 bytes in 0 s. 0 blk resent [18/09 09:01:23.765]

    is this correct?

  9. #9
    DW Contributor gentlex's Avatar
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    Quote Originally Posted by bertybassett View Post
    after the dos command I get

    SNMPv2-SMI::enterprises.1166.1.19.3.1.18.0 = INTEGER: 1079138078

    appear and this from tftp

    Read request for file <SB4100.bit>. Mode octet [18/09 09:01:22.234]
    Using local port 1207 [18/09 09:01:22.234]
    <SB4100.bit>: sent 0 blk, 0 bytes in 1 s. 0 blk resent [18/09 09:01:23.234]
    Read request for file <SB4100.bit>. Mode octet [18/09 09:01:23.250]
    Using local port 1208 [18/09 09:01:23.250]
    <SB4100.bit>: sent 1 blk, 124 bytes in 0 s. 0 blk resent [18/09 09:01:23.765]

    is this correct?
    that correct, that means factory mode is enable u should now be able to use cmfirm3 with the correct settings i posted above but make sure u close the tftpd32 server 1st if ur having problem getting it to work just change the by doing this

    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.4.0 x
    0123456789ab

    replace the digits in red with mac u want to put on the modem but make sure its a 20mb mac as u cant alter the the config file so what ever the speed is of the mac that the speed u will get, then run the cmd and copy the above and paste it into the dos window and press enter and it should say something about hex = and ur mac then just reboot the modem and connect the feed if the mac is good u should be online

  10. #10
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    Chapter21(New)

    --------------------------------------------------------------------------------

    A DOCSIS 1.1 to DOCSIS 1.0 Changer
    Build 104


    Features:
    * Embedded SNMP client
    * Supports 5 Firmware versions
    * Patches CVC to allow for non-signed firmware
    * Automatically downgrades to Open Sesame compatible firmware

    Instructions:
    ----------------------------------------------------------------------
    1: Change the IP address of your Ethernet card to 192.168.100.10
    2: Connect your cable modem directly to your Ethernet card
    3: Start this application
    4: Click "Let's go!"
    5: Wait then manually unplug the power and plug it back in
    6: Click "Let's go!" again

    What Will Happen:
    ----------------------------------------------------------------------
    The software will connect to your cable modem and put it into
    Surfboard Factory mode using the Bit File scheme. Then it will use
    the Factory Mode to install shell code that will execute the ChangeFirmware
    function. At this point, you need to hard boot your cable modem, then start
    the process over again. The second (or third) time around, the modem will
    downgrade its firmware to DOCSIS 1.0. Then, just use Open Sesame to isntall
    any firmware version you want!


    Firmware versions supported:
    ----------------------------------------------------------------------
    SB4200-1.4.9.0-SCM00-NOSH
    SB4200-1.4.9.2-SCM01-NOSH
    SB4100-1.4.9.0-SCM00-NOSH
    SB4100-1.4.9.2-SCM01-NOSH
    SB4100-0.4.5.0-SCM00-NOSH

    Thx to DerEngel



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