CM1100 Connectivity Issues

> [...] the CM1100 needs to be put in bridge mode or to disable to DHCP
> mode [...]

   That might make some sense if the CM1100 were a modem+router, but
it's only a modem, and, as such, has no DHCP or router capability to be
disabled.

   Whatever your problem might be, it's an sbsolute certainty that
that's not the solution.  A CM1100 is permanently "in bridge mode".

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 

Connect a wired PC directly to the CM modem and see if you notice any problems here. 

I would turn OFF The wifi radios on the main host router (NEST) and run just a few wired devices. See if the problems still appears. If not, turn on the wifi radios on the router and see what happens. 

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Rookie1988 wrote:

First time asking a question on this forum, so I apolgoize if I am providing too much / unnecessary information. Just making sure you have everything you need to assist me. 

 

I have a CM1100 modem connected to my Nest Wifi Router(latest model), and the Nest wifi is connected to my TP Link 16 Port Switch. This has been working pretty well for the past 5 months, however for the past 3 weeks my internet (hardwire and wifi devices) loses all services for a few minutes. Keep in mind, between hardwired and wifi devices, i have about 34 connected at all times. I have internet via Comcast (500 MBPS) This loss of service occurs about 4-5 times a day. I have not made any new equipment purchases or did software upgrades recently. When i do a network check via Google, i have download speeds of 452 mbps and upload of 9.5 mbps. I have spoken to xfinity and they said they see no issues on there end, and I believe they are correct as during loss of service my CM1100 still has all the icons lighting up. 

 

I spoke to Bestbuy and they said it is because the CM1100 needs to be put in bridge mode or to disable to DHCP mode due to the CM1100 and Nest wifi are both generating IP addresses throughout the day and sometimes this causes connectivity issues. They want to charge me to come out and fix this, so I'm trying to look online and do it myself, however I am not seeing any solutions. Does anybody have any ideas on what I should try?

 

Thank you everyone in advance!

 

 

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