DHCP relay IP and gateway IP, possible bad logic?

Phil Mayers p.mayers at imperial.ac.uk
Mon Mar 4 21:53:51 CET 2013

On 03/04/2013 07:05 PM, Igor Smitran wrote:

> As you can see CMTS will relay all requests from CM's and CPE's over
> primary interface address (private_ip/
> radius will get all requests from that IP. all offers need to go back to
> that same ip, no matter what giaddr is sent to client.

I'm confused.

First, it shouldn't matter which IP you reply to; both are on the same 
device, and both are routeable.

Second, "reply to giaddr" is mandated in the DHCP spec; are you *sure* 
you have "other DHCP servers" which "reply to source ip"? Which servers?

More information about the Freeradius-Users mailing list