0

I've been fighting with this issue for a few weeks, but one of my clients has Cox Communications as an ISP, with their standard modem, and a Netgear Nighthawk x6 router.

Originally the client had the modem/router combo from Cox, but this was switched out last week.

One strange issue that we're receiving is that computers seem to attempt to bypass the router DHCP server when connecting to the router, and instead attempt to communicate with the Cox server. This has lead me to have to assign static IPs, and hardcode the configuration of every computer in the building. This method works fine, with one exception. Several people have laptops that they need to use to commute to and from home with, so static mapping is not an option for them. Has anyone ever experienced anything like this?

Improve this question
6
  • Off the top of my head, the DHCP clients may be trying to contact the original DHCP server they had talked to previously to renew their leases. However, they should revert to normal broadcast behavior if the renew is unsuccessful.
    – LawrenceC
    Commented Mar 13, 2015 at 16:36
  • What's odd is that it's getting assigned a gateway of 192.168.1.200 and a DHCP server of the same IP. It's setting the DNS server to 192.168.63.1. I tried setting the router to use 10.0.0.1 as the gateway, but this has done nothing the quell the issue.
    – JD Davis
    Commented Mar 13, 2015 at 16:39
  • I may have finally figured out what it is. It appears that specific IP is assigned to the client's security cameras, and it's causing issues on the network. Now to figure out how to bypass it.
    – JD Davis
    Commented Mar 13, 2015 at 16:50
  • 1
    Dup IPs makes more sense as far as causing disruptions on the network - cable uses CMTS, so if you have a modem on-site, the protocol used on the Cox side of that device is not something that your PCs will understand. The modem is what translates that signal into Ethernet for the router and PCs to use.
    – MaQleod
    Commented Mar 13, 2015 at 19:26
  • Configure the router to narrow the dhcp range, then set the ip for the camera outside the dhcp range you set.
    – Moab
    Commented Mar 15, 2015 at 1:28

0

Reset to default

You must log in to answer this question.