I have configured my CMTS as ToD Server, in the CMTS configuration I have clock timezone CST -6, when I run a show clock it shows me the time of my region, but the cable modems take UTC time which is 4 hours different from my region, someone knows how I can correct this.
you have to configure the time-offset dhcp option, note it does not automatically adjust for DST either
i.e. in DHCPD this is US Central time
#Fall
#option time-offset -21600;
#Spring
option time-offset -18000;
I am very grateful for your answer, with that statement that I added in my DHCP server, I would like to mention that my time zone is GMT -6 so to get the value use this formula that I want to share in case someone needs this information.
Engineer thank you again for your support.
First Example
If a cable modem is used in a region that is GMT +11 hours, the appropriate value is calculated with these steps:
The number of seconds equivalent to 11 hours = 11 hours * (60 minutes / hour) * (60 seconds / minute) = 39600 seconds.
Second Example
If a cable modem is used in a region that is GMT - 4 hours. In this case, the negative value changes the procedure. The appropriate value is calculated with these steps:
Note: 1hr = (60 minutes / hour) * (60 seconds / minute) = 3600 sec
The number of seconds equivalent to - 4 hours = - 4 hours * (3600 second/hr) = - 14400 seconds.