WLC 8.5 and DHCP Proxy

[mmelbourne]

Hi,

I am running WLC 8.5.182.0, and for most small VLANs we are using the Internal DHCP Server which is adequate, but not ideal.

For a larger VLAN, it appears to be possible to set "DHCP Proxy Mode" to 'Disable' on a per-interface (VLAN) basis, and the DHCP request is effectively bridged on to the VLAN, where an upstream L3 devices can be configured for DHCP relay.

Can there be a mixture of "Global" (Proxy Mode enabled, and required for the Internal DHCP Server) and "Disabled" (Proxy Mode disabled) dynamic interfaces?

Thanks,

Matt

[Scott Fella]

Yes you can mix and match, but why?  I would not use DHCP proxy unless it is required.  If you are not using the controller for DHCP, then disable this feature.  Any subnet that has an external DHCP server, I would not have this feature enabled.  

[mmelbourne · Accepted solution]

Thanks Scott. The reason for a mix is to facilitate a migration to an external DHCP server, but yes, after which it's not required.

[Scott Fella]

Also, it confuses folks when the look at their dhcp and seeing an odd ip address.  Back in the day's it was normal to use that, but the support for internal dhcp and the lack of stability for dhcp server in the controller itself, made folks move away from this unless required.

[Rich R]

We use DHCP proxy extensively with external DHCP servers and no problems with it.