Hello, I have setup a freeradius server running on an oes2 sp2 server, 70%- 80% of the time authentication works and we have no problems, however when a user login fails and I check the logs it seems that the nas is passing a mac address as a username.
Any clue why? Please see logs below

From /var/log/radius/radius.log
Wed May 26 14:42:42 2010 : Error: rlm_eap: UserIdentity Unknown
Wed May 26 14:42:42 2010 : Error: rlm_eap: Identity Unknown, authentication failed
Wed May 26 14:42:42 2010 : Auth: Login incorrect (rlm_ldap: User not found): [00-1D-E0-78-54-F7] (from client CiscoNas port 1 cli 00-1D-E0-78-54-F7)
Wed May 26 14:46:21 2010 : Info: rlm_eap_mschapv2: Issuing Challenge
Wed May 26 14:46:21 2010 : Auth: Login OK: [jmendez.12] (from client localhost port 0)
Wed May 26 14:46:21 2010 : Auth: Login OK: [jmendez.12] (from client CiscoNas port 1 cli 00-21-5C-99-7A-3D)

debug log - from an earlier capture
failed debug log


Any help would be appreciated.
Thanks
Greg