Session Timeout

[NGUYEN Tuan Anh]

Hi,
I'd like to know how to put RADIUS Attribut Session-Timeout only in 
Access-Accept and not in Access-Challenge? I'm using HP 520wl version 
2.4.5, the manual says that it support RADIUS Session Timeout. I've 
configured  FreeRADIUS so that it sends Session-Timeout attribute in 
Access-Accept and Access-Challenge
Sending Access-Accept of id .....
      Session-Timeout = 300
      .....

but the Access point seems to ignore the attribute. Someone has an idea? 
Is it Session-Timeout := 300 or Session-Timeout = 300? Thanks alot.
Tuan Anh

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