Intermittent problem with IP addresses and internet connections dropped

Once a day or so my PC (Win7) will not be able to access the internet. Connection just drops. I use DHCP for IP addresses.

As far as I can see in the Event Viewer I get these types of errors "the address lease IP 192.168.1.64 for the network card with network 0x406186808C4C address was rejected by the 192.168.0.1 DHCP server (the DHCP server sent a DHCPNACK message)."

My local network is simply: PC-online router (Cisco E1200)-online internet (modem Siemens SpeedStream 4100 DSL)

"When this happens, we run ' ipconfig - release 'then' ipconfig - renew." This usually fixes the problem. Sometimes, this does not solve the problem, and we need also the modem power cycle. In a few minutes find us the internet connection. It's nice to have a manual correction, but we want to solve this problem to happen... as is the engine of our family crazy...

The address LAN IP of the modem is set to 192.168.0.1

The address LAN IP of the router is set to 192.168.2.1

When things are running OK, I usually see it in the ' ipconfig-all the ' results: = 192.168.2.147 IPv4 address (Preferred) [but the IP numbers change slightly] my understanding is that see "Present" in the result is a good thing (but I don't know why...).

Any thoughts on what is happening? and how to permanently solve this problem?

I'm also confused on IPv4 and IPv6. Should I be concerned with any information of IPv6 in the ipconfig-all the results?

Thanks for the help

Talked with the ISP (ATT). Zig - zag, you were on the problem. I had both modem and router set to DHCP mode... so I had some conflicts. The solution was to define the "bridge mode" dsl modem and configure the router to "PPPoE mode. Everything works now. Thanks for your help.

Tags: Windows

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