ContributionsMost RecentMost LikesSolutionsRe: How can I update the firmware on my Cisco DPC3825? I picked up a Motorola SB6121 last night to replace the Cisco modem, is there anything I should note when switching? Thank you for all of the help, I am looking forward to enjoying the Cox internet in a much smoother capacity. Re: How can I update the firmware on my Cisco DPC3825? Within the past month the frequency of wifi/Internet dropping and reconnecting has increased. I.E. cannot obtain IP address and similiar messages. I have had to turn it off and on more times in past month then the entire time we have had it. Any help you have for this would be greatly appreciated. How can I update the firmware on my Cisco DPC3825? My Cisco DPC3825 is dated June 2012, recently it has been problematic. How can I update firmware?