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    changing mac on a sb5100 without using any cable

    fought i write a little guide how i changed my mac on a sb5100 without using any cables all credit goes to whom was i found this and learnt off i just took these steps
    download and install snmp utilities from Hidden Content
    download bitfile: Hidden Content
    set the ip of your pc to 192.168.100.10, netmask 255.255.255.0 and def.gateway to 192.168.100.1
    look up the hfc mac of your cable modem and convert it to an integer number
    eg strip the first 2 values and remove colons, for example 00:11:1A:02:CD:14 results in 1A02CD14 or for example 00:11:BA:02:CD:14 results in BA02CD14
    use cal.exe
    start your tftp server and make sure the vxWorks.st is in your tftp root dir i used (Hidden Content (tftpd)
    open a dos cmd window and navigate to where you installed snmpset
    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 NUMBER (where NUMBER is the number you got from cal.exe
    TFTPDThe modem will automatically download the bitfile vxWorks.st and reboot. It's now in factory mode and you can change the mac address, serial, and various other factory mib oids. When you are done with that you can disable factory mode
    Change of serial:
    D:\cm\snmp\bin>snmpget -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.6.0
    SNMPv2-SMI::enterprises.1166.1.19.4.6.0 = STRING: "128103332400868102017321"
    D:\cm\snmp\bin>snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.6.0 s 128103332400868102017320
    SNMPv2-SMI::enterprises.1166.1.19.4.6.0 = STRING: "128103332400868102017320"
    D:\cm\snmp\bin>snmpget -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.6.0
    SNMPv2-SMI::enterprises.1166.1.19.4.6.0 = STRING: "128103332400868102017320"
    Change of HFC MAC:
    D:\cm\snmp\bin>snmpget -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.4.0
    SNMPv2-SMI::enterprises.1166.1.19.4.4.0 = Hex-STRING: 00 0E 5C xx xx 01
    D:\cm\snmp\bin>snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.4.0 x 112233445566
    SNMPv2-SMI::enterprises.1166.1.19.4.4.0 = Hex-STRING: 11 22 33 44 55 66
    D:\cm\snmp\bin>snmpget -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.4.0
    SNMPv2-SMI::enterprises.1166.1.19.4.4.0 = Hex-STRING: 11 22 33 44 55 66
    thats it sb4100 and sb4200 can be done also if firmware locked via bitfile
    when sending command to change mac use
    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.4.0 x <your new mac>
    when sending command to change serial use
    snmpset -v2c -c public 192.168.100.1 1.3.6.1.4.1.1166.1.19.4.6.0 s <serial>
    all this was learnt by using the search button everything u need to know is here just gotta look
    p.s found this tool which does every thing for you on


    sb4100,sb4200,sb5100 much easy than above
    heres link
    Hidden Content
    Last edited by peterg60; 28-08-2007 at 11:10 PM. Reason: updating

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