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Forum Discussion
Unable to change DHCP pool addresses (Netgear Orbi RBR10)
Hi Community, I recently purchased an Orbi system but I have been unable to figure out how to change the DHCP pool addresses. Here is a screenshot of my settings: https://i.imgur.com/Vmnw8cY.png...
> Please describe what you have done and what happened.
I changed my subnet mask to 255.255.254.0, which should have opened up that last bit to be used for the pool of addresses. I want to change DHCP to be 10.0.1.x addresses, and leave 10.0.0.x addresses open to be statically assigned to devices.
I am aware of the difference between reservations and static assignments. I am using both, for some devices I am reserving them in the Orbi interface, however for others I am using Puppet on my virtualization servers to send the configurations down to the VM's. Their MAC changes every time they are rebuilt, so they are instead using static assignments given to them by the configuration manager.
Using 10.0.0.x and splitting it at 100 would work, as I don't have that many devices to fill it up yet, however I think that having the distinct IP's of 10.0.0.x and 10.0.1.x lets me see more easily at a glance. I also like leaving it open for expansion for if I ever get more devices than I currently have. I would seperate them by VLAN, but it seems that Orbi doesn't support that.
The problem comes with the Orbi configuration interface not allowing me to change the DHCP pool's range from the origional 10.0.0.x to 10.0.1.x, with the third octet in the interface being grayed out and read only.
I could flip it and have 10.0.1.x being my static pool, however 10.0.0.x is faster for me to type so I would prefer it that way.
For home class routers, there usually is only one IP pool and subnet to use, thus if the IP is 10.0.0.1 for the router, this is the main IP address string and network that can be used on home class routers. You can't use two different IP address networks or even static IP addressed devices using different IPs. Maybe possible with business class routers, however home class, most average home users only need 1 IP address and subnet this router mfrs don't put in support to more than 1 IP address and subnet. Most users don't have 254 devices either.
A suggestion would be to set 10.0.0.1 and 255.255.255.0 on the RBR. Change the IP address pool size to .100 to .200. This pool size gives you 100 devices to set IP ADDRESS RESERVATIONS ON the router. Now from .2 to .99 and .201 to .254 you have these ranges for STATIC IP Addressed devices were IP addresses are set ON devices, not the router. No IP address reservations go here.
I'm not asking for 2 seperate networks. I'm just trying to make a larger subnet, hence why I changed the subnet mask from 255.255.255.0 to 255.255.254.0. This should give my subnet an extra bit so that I can have addresses 10.0.0.1-10.0.1.254 available to use. Then I want to change the DHCP pool to 10.0.1.1-10.0.1.254 and use 10.0.0.2-10.0.0.255 as addresses that I manage either through reservations or static assignments.
I'm not trying to make VLANs or seperate subnets, since I know thats not an option. I'm simply trying to make one larger subnet that makes it easier to manage my devices.
I'm making 1 subnet with 10.0.0.0/23 as its CIDR notation. Below is a chart with a | separating the network prefix bits from the host address bits:
Subnet mask 11111111.11111111.1111111|0.00000000 255.255.254.0 Network 00001010.00000000.0000000|0.00000000 10.0.0.0 First Address 00001010.00000000.0000000|0.00000001 10.0.0.1 Last Address 00001010.00000000.0000000|1.11111111 10.0.1.255 As you can see it is just 1 network, which is all I am trying to do. Nothing fancy, just a larger address pool for the subnet.
I just don't think thats supported on home class routers. 255.255.255.0 is mostly support for one 1 IP address range.
You might contact NG support to ask about this.
I think this can be done, but not the way you want.
Orbi is going to use the subnet where the router is for DHCP. That means that 10.0.0.x should be your DHCP pool.
10.0.1.x should be the "static" or "assigned" pool.
You are trying to do the opposite.
How difficult is it to give this a try?
