Missing Acct-Output/Input-Octets attributes using Aironet 1200

[Marcos Gonzalez]

Hello all members of this list. My name is Marcos, I'm a Spanish

university student, and I'm doing my final project about Radius AAA on 
wifi networks.
So far, I've managed to use EAP-TLS authentication and everything seems 
to work. But I'm trying to use accounting and it doesn't work as expected.

I'm using freeradius 1.0.4, on a Fedora Core 4. My NAS is a Cisco 
Aironet 1200. The client is a WinXP  laptop.  My problem is:

When receiving "Accounting-Request" accounting packages, both 
"Acct-Status-Type" = "stop" or "alive", they include the 
"Acct-Session-Time" attribute, so I can track time. But the 
"Acct-Input-Octets", "Acct-Output-Octets", "Acct-Input-Packets" nor 
"Acct-Output-Packets" are not present. I checked this both running 
"radiusd -x" and sniffing with ethereal. They're allways missing.

I think the problem is the NAS configuration. I don't know if some kind 
of misconfiguration made only time being tracked, not bytes sent and 
received. If somebody knows a way of make both things being tracked, or 
an extract of the config I should use on the NAS, it would be highly 
apreciated. I've been trying to fix this for days. Thanks in advance.