DHCP IP Address assignment MR60

[larry3706]

I have been having some connection issues with my thermostats, not to my LAN but to the ecobee servers. I found that reserving an IP address for the thermostats seems to have resolved the issue, but in the troubleshooting process I noticed that my router was assigning the same IP address to a thermostat and a different wireless device(Amazon Dot).

I am less than smart on networking but I thought that was the whole point of DHCP and that the router would assign unique IP Addresses to each device when it asks for a lease. Why is the router assigning the same IP address to two different devices? I am guessing that is the root cause of my thermostat issues.

Larry

[Dennyi]

In the DHCP setup, change the starting IP address to a higher number.  I use .130.

That leaves the random dhcp assisned number to xxx.xxx.xxx.131 - xxx.xxx.xxx.(whatever the Ending IP Address is set to).

Any Reserved DHCP IP address's you want to assign goes below the Starting IP address.  The system will not try to assign a different device to the reserved IP address that way.

Just don't to add a reservation to the same IP as the router is assigned.

[larry3706]

Thanks very much for a response. The conflict I was having was before I reserved an IP address, still in the lower numbers. Since I reserved addresses for the two devices, the router has not tried to automatically assign those reserved addresses to any other device. But, if I run into trouble again, your fix looks perfect.

Larry

[LuisRHernandez]

Does anyone knows how to limit the DHCP lease time to 12hrs