Netgear M4200-10MG-PoE+ (GSM4210P) - Multigigabit Managed Switch with 8*2.5G and 2x10G SFP+ Layer 3 Administrator's Guide

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DHCP Server 
471
 Managed Switches
In the Hardware Type list, select ethernet.
In the Host Number field, enter 192.168.200.1.
In the Network Mask field, enter 255.255.255.0. As an alternate, you can enter 24 in 
the Network Prefix Length field.
In the Days field, enter 1.
6. 
Click Add. The pool_manual name is now added to the Pool Name drop-down list.