OT: Cisco Disconnect-Request packets

[Jonathan Gazeley]

Hi all,

Not directly related to FreeRADIUS but I gather people here have some 
experience with Cisco WiSMs and 802.1x.

I'm trying to use radclient to craft a Disconnect-Request packet to 
disconnect a user on an 802.1x network. I've checked the RFCs for the 
Disconnect-Request packets and I believe I am providing all the 
necessary attributes to disconnect a user, however the WiSM always responds:

rad_recv: Disconnect-NAK packet from host 172.17.107.211 port 3799, 
id=219, length=26
	Error-Cause = Missing-Attribute


I am sending packets like these:

Sending Disconnect-Request of id 219 to 172.17.107.211 port 3799
	User-Name = "jg4461"
	Calling-Station-Id = "00:1b:63:08:b4:eb"
	Framed-IP-Address = 172.21.107.197
	Called-Station-Id = "00:21:55:ac:5b:60:ResNet-Wireless"
	NAS-Port-Id = "29"
	NAS-Port-Type = Async
	Acct-Session-Id = "jg44614ddcd9e6/00:1b:63:08:b4:eb/222935"
	NAS-IP-Address = 172.17.107.211
	NAS-Port = 29
	NAS-Identifier = "wism11"


So, does anyone know which attributes I must send to disconnect a user 
in this way? Is there an easier way of doing it?

Many thanks,
Jonathan