If you're doing 802.1x authentication, then it will be the MAC. The supplicant may not even have an IP address when it communicates with the NAS (the ethernet switch) if it is configured for DHCP. If you're logging into the CLI of a device configured to authenticate using RADIUS, then I would not necessarily expect there to be a Calling-Station-Id. If there were, I'd expect it to be the IP address, since the communication between the remote client and the network device is all via IP. I can't think of any other reason for an Ethernet switch to make a RADIUS request. Rgds, Guy -----Original Message----- From: freeradius-users-bounces@lists.freeradius.org [mailto:freeradius-users-bounces@lists.freeradius.org] On Behalf Of Jonathan De Graeve Sent: 11 October 2005 20:04 To: FreeRadius users mailing list Subject: Value of Calling-station-id on ethernet Is this value the mac or the ip address on Ethernet networks. I need to know since I'm programming a radiusclient. J. -- Jonathan De Graeve Network/System Administrator Imelda vzw Informatica Dienst 015/50.52.98 Jonathan.de.graeve@imelda.be - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html This e-mail is private and may be confidential and is for the intended recipient only. If misdirected, please notify us by telephone and confirm that it has been deleted from your system and any copies destroyed. If you are not the intended recipient you are strictly prohibited from using, printing, copying, distributing or disseminating this e-mail or any information contained in it. We use reasonable endeavours to virus scan all e-mails leaving the Company but no warranty is given that this e-mail and any attachments are virus free. You should undertake your own virus checking. The right to monitor e-mail communications through our network is reserved by us.