DHCP Reserved IP - within scope or not?

[idscomm]

Hello,

I was wondering if the DHCP Reserved IP had to be within the DHCP Scope (like Microsoft) or outside the scope like DHCPD or does it matter?

Simply trying to tweak my DHCP addresses a bit and wanted to make sure I knew how Untangle handled DHCP.

Thanks!

[sky-knight]

I say if it's not within the scope, it's misconfigured. And I say that because the scope defines all of the addresses that will be passed, a reservation is just holding a specific one for a given mac address.

That being said, I do not believe DNSMasq cares... I'm pretty sure it'll hand the IP assignment to the endpoint so long as the address in question fits within the IP/Mask scope of the interface that's doing the handing. But don't quote me on that, because again I don't ever configure DHCP that way.

[idscomm]

I say if it's not within the scope, it's misconfigured. And I say that because the scope defines all of the addresses that will be passed, a reservation is just holding a specific one for a given mac address.

That being said, I do not believe DNSMasq cares... I'm pretty sure it'll hand the IP assignment to the endpoint so long as the address in question fits within the IP/Mask scope of the interface that's doing the handing. But don't quote me on that, because again I don't ever configure DHCP that way.

I am used to Windows where you configure the DHCP to serve addresses within the scope, I am with you on that. In the other hand, I worked with pfSense quite a bit and with this product it is the opposite, Reserved addresses have to be outside the scope or you'll get an error which was weird for me the first time but ... that's the way it has to be configured. Since Untangle runs a Linux Distro, I was wondering if it was the same as pfSense or more like the Microsoft way....

[jcoffin]

I am used to Windows where you configure the DHCP to serve addresses within the scope, I am with you on that. In the other hand, I worked with pfSense quite a bit and with this product it is the opposite, Reserved addresses have to be outside the scope or you'll get an error which was weird for me the first time but ... that's the way it has to be configured. Since Untangle runs a Linux Distro, I was wondering if it was the same as pfSense or more like the Microsoft way....

Reserved IPs can be inside or outside the DHCP scope but inside the network range. The error is probably since the MAC is already assigned to duplicate IPs.

BTW, pfsense is based on BSD, not Linux so there are differences.

[idscomm]

Reserved IPs can be inside or outside the DHCP scope but inside the network range. The error is probably since the MAC is already assigned to duplicate IPs.

BTW, pfsense is based on BSD, not Linux so there are differences.

Thanks for the clarification, I knew reserved IP had to be within the Network range but did not know if they had to be within the scope or not. Perfect, this answers my question...

Thanks a lot!