DHCP server ip pool limit on ProSafe M4100

Question

Hi,&nbsp;&nbsp; I'm trying out the DHCP server feature on the Prosafe M4100-26-POE.&nbsp; After reading the guide, I successfully created a IP pool.&nbsp; However I can't create more than 15 reserverations.&nbsp; Tried both web UI and CLI.&nbsp; Is this the hard limit for the switch?&nbsp; Seems kind of low.&nbsp;(M4100-26G-POE) #configure(M4100-26G-POE) (Config)#ip dhcp pool static_host_16Couldn't create DHCP pool.&nbsp;

Hopchen · Answer

Hi oxArt2Wave,
&nbsp;
It seems that you are trying to create more than 16 DHCP pools? There is a limitation on these switches, that they can only house max 16 pools, max 1024 leases. It is in the datasheet here:http://www.downloads.netgear.com/files/GDC/datasheet/en/M4100.pdf
&nbsp;
If you want to reserve IP address for specific clients, you can do that from within a DHCP pool. As described here, on page 385:http://www.downloads.netgear.com/files/GDC/M4100/M4100_CLI_v10-0-2_20_Apr2015.pdf
&nbsp;
&nbsp;
Cheers

oxArt2Wave · Answer

Hi&nbsp;@Hopchen&nbsp; Thank you for point out the limit in the data sheet. &nbsp;But that think Netgear is not be honest with customer. &nbsp;Peolple read the datasheet will think it means 16 DHCP Dynamic pools. &nbsp;It should not include other type such as (Unallocated and Manual).&nbsp;&nbsp; I'm not trying to create 16 DHCP Dynamic pools. &nbsp;I created a single dynamic pool with a /24 subnet. Then started to create manual reservations within the subnet range by following the&nbsp;https://kb.netgear.com/21933/How-do-I-configure-a-Dynamic-Host-Configuration-Protocol-DHCP-reservation-using-CLI-commands-on-my-managed-switch. &nbsp;The web interface KB&nbsp;document suggests the same:&nbsp;https://kb.netgear.com/21934/How-do-I-configure-a-Dynamic-Host-Configuration-Protocol-DHCP-reservation-using-the-web-interface-on-my-managed-switch.&nbsp;There is no way of creating reservations within same&nbsp;DHCP&nbsp;pool configuration. &nbsp;Hence, each&nbsp;reservation will take one from the limit of 16. &nbsp;&nbsp;&nbsp;

Hopchen · Answer

Hi again,
&nbsp;
Thanks for clarification. I understand what you are doing now. I've left for the day, but let me take a look at it, in our lab, when back Monday.
&nbsp;
Cheers

Hopchen · Answer

Hi&nbsp;oxArt2Wave
&nbsp;
You did the config correctly. Reservations will require a separate&nbsp;"pool". The problem is then of course that the switch will only hold a maximum of 16 pools. Unfortunately, there is not much you can do about that.
&nbsp;
Is it possible that you can use static IPs instead, on the end devices?
&nbsp;
Thanks

oxArt2Wave · Answer

Hi&nbsp;Hopchen,&nbsp; Thank you for verifying the configuration. &nbsp;At this moment, the M4100 is not suitable for my needs to act as DHCP server. &nbsp;I like the fact I can configure DHCP options per reservation. &nbsp;But 15 reservations is just not enough. &nbsp;I hope netgear can relax this hard limit. Or enforce&nbsp;the limit&nbsp;for Dynamic pools only.&nbsp;And the static IP assignments&nbsp;defeat the purpose of using DHCP to configuration the host.&nbsp;

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DHCP server ip pool limit on ProSafe M4100

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