AW: User Problem with Cisco Nexus 4.x

Hi, I found the problem on my own. Cisco Nexus with NXOS Version older than 4.2 (4.0 and 4.1) don´t like the entry "Vendor-Specific = 9". It seems that freeradius add this automatically if it´s not within the config. But, when i put it in the config, the dump shows "bad udp checksum", wireshark "AVP too long". When i remove this line from the config, "vendor-specific=9" is also transmitted, but without checksum/avp too long error. Is this behavior documented anywhere? I didn´t found this. Jan