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Losing DHCP Reserved addresses - range issue?

kab

Occasional Visitor
Think I found the answer, want to confirm. Previous router I always allocated reserved DHCP addresses *outside of* the allocated DHCP block: E.g., DHCP block 10.xx.yy.30-99, reserved addresses for NAS/servers at 10.xx.yy.10-20, and their IP is not set on the given host. I have a ~15 yr old note that claims this is recommended practice. After searching here (https://www.snbforums.com/threads/dhcp-server-stops-handing-out-ips-for-wireless.40751/#post-342531 and others), I take it this is incorrect practice? Reservations should be done within the 30-99 DHCP block, or that block extended? Only hosts that self-assign should be outside of the DHCP block.

What I've seen with Asus R2900/AC86U, merlin 384.3, is that reservations outside of the established block will work for a while and then silently disappear after some random interval. Not a bug if this is incorrect practice.

Bonus question: Is there someplace in the GUI to revoke the DHCP lease for a target?

TIA
 

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