DHCP address reservation fails on Verizon DLink DSL-2750B

[PhoebeAnn]

I define a static address reservation for a specific MAC address and IP address of 192.168.2.66. This address immediately shows up in the address distribution list, with a status of EXPIRED. When I plug in the device, it apparently does not receive the address from the router, and assigns itself the Link Local address: 169.254.20.1. If I remove the static assignment from the router, I can plug in the device and it receives a dynamic address OK.

 

[BuddhaSkoota]

I define a static address reservation for a specific MAC address and IP address of 192.168.2.66.

If I remove the static assignment from the router, I can plug in the device and it receives a dynamic address OK.

Unless you've changed the router's address, the default IP address range is in the 192.168.1.x subnet, so using 192.168.2.66 will not work.

 

[PhoebeAnn]

I define a static address reservation for a specific MAC address and IP address of 192.168.2.66.

If I remove the static assignment from the router, I can plug in the device and it receives a dynamic address OK.

Unless you've changed the router's address, the default IP address range is in the 192.168.1.x subnet, so using 192.168.2.66 will not work.

Well, duh, of course I changed the default range. After a couple of very frustrating hours with Verizon tech "support", I think their position is that they don't support any internal router functions. D-Link doesn't even list the DSL-2750B on their website, and don't support it because it's Verizon's problem.

 

[BuddhaSkoota]

Well, duh, of course I changed the default range.

The next time you need help, you should provide ALL details so people aren't left guessing about your network configuration.

 

[PhoebeAnn]

Based on long frustrating talks with Verizon tech "support" and Verizon "Premium" tech "support", DHCP address reservation ("manual allocation" in RFC 2131) is neither understood nor supported by Verizon in consumer routers. The feature may not work without fussing with hidden settings in the router, or may not even be enabled in the 2750B. It is not mentioned in Verizon's DSL-2750B manual, and D-Link doesn't support the 2750B at all, because it was (apparently) manufactured for Verizon, with no support included.

D-Link: OK, we got just the thing for you. Do you want DHCP address allocation with that?
Verizon: Nah, nobody uses that.

If anyone wants to investigate deeper, you can find the feature on the router via Services->IP Address Distribution->Connection List->New Static Connection, where you can associate a MAC address with an IP, and naively believe that that IP will be assigned when a device with that MAC address issues its DHCP Discovery request. I'm giving up on it for now.