The DHCP server on the 9300 is not working properly

[shlomoi]

Hi,

we recently purchased 10 units of  9300 switches , we are interested in the switches being used as the DHCP of the  for several networks , and we want the FW stay  the  DEFAULT GATEWAY for the vlans , we set everything 
But we receive the MERAKI  as the DEFAULT GATEWAY and not the FW.

 network 192.168.100/24

ip interface 192.168.100.253

default gateway of the interface in FW  :Does not exist but should be 192.168.100.254 

Does anyone know what the problem is.

Thanks 

[DarrenOC]

Hi @shlomoi , that’s always the default behaviour with Meraki DHCP.  You’ll need to create a new Option to amend the DFG.

but….i don’t believe you can set Options using the 9300Ms.

@cmr - I believe that was your experience of these?

[cmr]

@DarrenOC you are correct, it is not possible to create a number of DHCP options, generally ones where there is a name in Cisco IOS-XE, such as domain-name.  It did also include NetBIOS node type and some others, but I do think that default gateway was one of the few that did work.

[shlomoi]

Hi, I set option 3 and you are right because I get an error message
So actually it is not possible to set up a dhcp server on the meraki

thanks

There were errors in saving this configuration:

• DHCP option code 3 unsupported on C9300X

[DarrenOC]

yep, never understood why such a basic option isn’t supported in these newer models!

[cmr]

Apologies for my poor memory, @DarrenOC you were 100% correct!

[DarrenOC]

Of course I was 😆

[GreenMan]

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Setting_Custom_DHCP_O...

[cmr]

It was always supposed to be supported when native IOS-XE Meraki was released.  @GreenMan have you been able to verify that?

[GreenMan]

There's definitely no specific tie-up between these two things;    the extra DHCP options don't become supported within the IOS XE 17.15.1.9 that's now available for the C9300 / MS390 platforms For the uninitiated this transitions these from a container-based architecture to one that is based on native IOS XE, with support for Meraki cloud management - check out all the details on this in the Release Notes available in Org > Firmware upgrades in Dashboard, for more on this - you'll find it under the Beta tab, for the time being)

There was however a significant focus on bringing this architecture change to fruition prior to bringing on other features.  These DHCP options ould fall into the latter.  Right now I don't have any extra info on timing for those.

[cmr]

Thanks @GreenMan, so perhaps the 2025 timeline I was given referred to a subsequent native IOS-XE release, makes sense now.