Hi All, I have some intermittent issue with our Radius auth. OS : SLES 11 Radius 2.1.1 We get the cert from GlobalSign and use it at the 2 Radius server. So Server A and Server B use the same cert. in Server B, ometimes it works fine to authenticate and sometimes its failed but everything fine in Server A. Fri Feb 22 18:31:39 2013 : Auth: Login OK: [sdholakia2] (from client AllWirelessAP port 0 via TLS tunnel) Fri Feb 22 18:31:39 2013 : Auth: Login OK: [sdholakia2] (from client AllWirelessAP port 0 cli A0-88-B4-0F-C3-D8) *Fri Feb 22 18:36:30 2013 : Error: TLS Alert read:fatal:unknown CA Fri Feb 22 18:36:30 2013 : Error: TLS_accept:failed in SSLv3 read client certificate A Fri Feb 22 18:36:30 2013 : Error: rlm_eap: SSL error error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca Fri Feb 22 18:36:30 2013 : Error: SSL: SSL_read failed inside of TLS (-1), TLS session fails.* Fri Feb 22 18:36:30 2013 : Auth: Login incorrect: [800200sq] (from client AllWirelessAP port 0 cli A0-88-B4-58-BA-8C) Fri Feb 22 18:37:34 2013 : Auth: Login OK: [800200sq] (from client AllWirelessAP port 0 via TLS tunnel) Fri Feb 22 18:37:34 2013 : Auth: Login OK: [800200sq] (from client AllWirelessAP port 0 cli A0-88-B4-0F-C3-D8) Any idea what should i check for that error? Thanks -- Best Regards, Danny