How to configure DHCP server for multiple subnets with X430-24t switches?

[Arun_Verma]

Hi All,

Our department manages its own network in our University. All the network switches (X430-24t/48t) are connected to gateway network switch(Extreme switch only) which is provided by the University.

Each Switch has own its subnet. We want to run a common DHCP server for our department. For this, we have to install a DHCP server on one machine but only machines connected to that subnet/Switch is able to get IP address from DHCP server. On each switch, we are using Bootrelay to forward DHCP request to dedicated DHCP server. Bootrelay configuration is not done at gateway switch as we don't have access to it.

Using nc and tshark, we found DHCP packets are not reaching to DHCP server from any other subnet. Do we need to configure Bootrelay configuration on gateway switch also to work our DHCP setup?

Thanks,
V Arun

[Erik_Auerswald]

As far as I know the X430 switch is layer 2 only and does not support layer 3 routing nor DHCP relay.

[Arun_Verma]

Ya, Sure. Thanks for quick reply.

[Henrique]

Hi Arun, if X440 is the gateway switch, could you please enable and configure DHCP relay to that X440 and let us know if that worked?

As already shared before, the relay must be done by the switch that's routing among those subnets.

[Arun_Verma]

We are using Summit X440-24p(Layer 3) as gateway switch for routing between subnets.