Dot1x with port security and redundant radius servers

Question

I have a strange issue with my dot1x port authentication.  I have two radius servers configured in my switch for redundancy, and on my switchport I have a Cisco IP phone and a PC.  Testing redundnacy with the radius servers, when I have both servers active and running, the port authentication works fine for both phone and pc.  When I fail the radius servers in the configuration, by disconnecting the NIC on it, the switch goes to the surviving radius server and authenticates, (I can see it in the running log) both the phone and PC get an access-accept, but only the phone works on the network and the port light stays amber showing it's blocking for the pc.  Strange, since it showed an accept on the radius server.
This only seems to happen when the first one on the list is failed.  When the second one is failed, it obviously won't need to try it, so there's not an issue.  Any ideas?
Here's the setup and configs:
freeradius 2.1.12-4
cisco 3560
Switch Ports Model              SW Version            SW Image                
*    1 52    WS-C3560G-48PS     12.2(53)SE2           C3560-IPBASEK9-M 
aaa new-model
aaa authentication dot1x default group radius
aaa authorization network default group radius
interface GigabitEthernet0/1
switchport access vlan 100
switchport mode access
switchport voice vlan 110
authentication event no-response action authorize vlan 901
authentication host-mode multi-domain
authentication port-control auto
authentication periodic
authentication violation protect
mab
dot1x pae authenticator
dot1x timeout quiet-period 10
dot1x timeout tx-period 1
no mdix auto
spanning-tree portfast
radius-server host 10.90.1.88 auth-port 1645 acct-port 1646 key 7 xxx
radius-server host 10.90.1.85 auth-port 1645 acct-port 1646 key 7 xxx
Here's an authentication string from the radius server:
(there are two mac address.  The first one 00.13 is the PC and the second 30.37 is the phone)
rad_recv: Access-Request packet from host 10.90.100.7 port 1645, id=204, length=160
User-Name = "001372b639a6"
User-Password = "001372b639a6"
Service-Type = Call-Check
Framed-MTU = 1500
Called-Station-Id = "9C-AF-CA-23-D9-01"
Calling-Station-Id = "00-13-72-B6-39-A6"
Message-Authenticator = 0xfeef777a8033c24934306b3cce78c8f1
NAS-Port-Type = Ethernet
NAS-Port = 50001
NAS-Port-Id = "GigabitEthernet0/1"
NAS-IP-Address = 10.90.100.7
Wed Sep 18 10:48:06 2013 : Info: # Executing section authorize from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:06 2013 : Info: +- entering group authorize {...}
Wed Sep 18 10:48:06 2013 : Info: ++[preprocess] returns ok
Wed Sep 18 10:48:06 2013 : Info: ++[chap] returns noop
Wed Sep 18 10:48:06 2013 : Info: ++[mschap] returns noop
Wed Sep 18 10:48:06 2013 : Info: ++[digest] returns noop
Wed Sep 18 10:48:06 2013 : Info: [suffix] No '@' in User-Name = "001372b639a6", looking up realm NULL
Wed Sep 18 10:48:06 2013 : Info: [suffix] No such realm "NULL"
Wed Sep 18 10:48:06 2013 : Info: ++[suffix] returns noop
Wed Sep 18 10:48:06 2013 : Info: [eap] No EAP-Message, not doing EAP
Wed Sep 18 10:48:06 2013 : Info: ++[eap] returns noop
Wed Sep 18 10:48:06 2013 : Info: [sql]           expand: %{User-Name} -> 001372b639a6
Wed Sep 18 10:48:06 2013 : Info: [sql] sql_set_user escaped user --> '001372b639a6'
Wed Sep 18 10:48:06 2013 : Debug: rlm_sql (sql): Reserving sql socket id: 3
Wed Sep 18 10:48:06 2013 : Info: [sql]           expand: SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '%{SQL-User-Name}'           ORDER BY id -> SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '001372b639a6'           ORDER BY id
Wed Sep 18 10:48:06 2013 : Debug: rlm_sql_mysql: query:  SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '001372b639a6'           ORDER BY id
Wed Sep 18 10:48:06 2013 : Info: [sql] User found in radcheck table
Wed Sep 18 10:48:06 2013 : Info: [sql]           expand: SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '%{SQL-User-Name}'           ORDER BY id -> SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '001372b639a6'           ORDER BY id
Wed Sep 18 10:48:06 2013 : Debug: rlm_sql_mysql: query:  SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '001372b639a6'           ORDER BY id
Wed Sep 18 10:48:06 2013 : Info: [sql]           expand: SELECT groupname           FROM radusergroup           WHERE username = '%{SQL-User-Name}'           ORDER BY priority -> SELECT groupname           FROM radusergroup           WHERE username = '001372b639a6'           ORDER BY priority
Wed Sep 18 10:48:06 2013 : Debug: rlm_sql_mysql: query:  SELECT groupname           FROM radusergroup           WHERE username = '001372b639a6'           ORDER BY priority
Wed Sep 18 10:48:06 2013 : Debug: rlm_sql (sql): Released sql socket id: 3
Wed Sep 18 10:48:06 2013 : Info: ++[sql] returns ok
Wed Sep 18 10:48:06 2013 : Info: ++[expiration] returns noop
Wed Sep 18 10:48:06 2013 : Info: ++[logintime] returns noop
Wed Sep 18 10:48:06 2013 : Info: ++[pap] returns updated
Wed Sep 18 10:48:06 2013 : Info: Found Auth-Type = PAP
Wed Sep 18 10:48:06 2013 : Info: # Executing group from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:06 2013 : Info: +- entering group PAP {...}
Wed Sep 18 10:48:06 2013 : Info: [pap] login attempt with password "001372b639a6"
Wed Sep 18 10:48:06 2013 : Info: [pap] Using clear text password "001372b639a6"
Wed Sep 18 10:48:06 2013 : Info: [pap] User authenticated successfully
Wed Sep 18 10:48:06 2013 : Info: ++[pap] returns ok
Wed Sep 18 10:48:06 2013 : Info: # Executing section post-auth from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:06 2013 : Info: +- entering group post-auth {...}
Wed Sep 18 10:48:06 2013 : Info: ++[exec] returns noop
Sending Access-Accept of id 204 to 10.90.100.7 port 1645
Wed Sep 18 10:48:06 2013 : Info: Finished request 0.
Wed Sep 18 10:48:06 2013 : Debug: Going to the next request
Wed Sep 18 10:48:06 2013 : Debug: Waking up in 4.9 seconds.
Wed Sep 18 10:48:11 2013 : Info: Cleaning up request 0 ID 204 with timestamp +77
Wed Sep 18 10:48:11 2013 : Info: Ready to process requests.
rad_recv: Access-Request packet from host 10.90.100.7 port 1645, id=205, length=160
User-Name = "3037a616cd49"
User-Password = "3037a616cd49"
Service-Type = Call-Check
Framed-MTU = 1500
Called-Station-Id = "9C-AF-CA-23-D9-01"
Calling-Station-Id = "30-37-A6-16-CD-49"
Message-Authenticator = 0xc9173e759dd759b9d414d192783e8a8e
NAS-Port-Type = Ethernet
NAS-Port = 50001
NAS-Port-Id = "GigabitEthernet0/1"
NAS-IP-Address = 10.90.100.7
Wed Sep 18 10:48:13 2013 : Info: # Executing section authorize from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:13 2013 : Info: +- entering group authorize {...}
Wed Sep 18 10:48:13 2013 : Info: ++[preprocess] returns ok
Wed Sep 18 10:48:13 2013 : Info: ++[chap] returns noop
Wed Sep 18 10:48:13 2013 : Info: ++[mschap] returns noop
Wed Sep 18 10:48:13 2013 : Info: ++[digest] returns noop
Wed Sep 18 10:48:13 2013 : Info: [suffix] No '@' in User-Name = "3037a616cd49", looking up realm NULL
Wed Sep 18 10:48:13 2013 : Info: [suffix] No such realm "NULL"
Wed Sep 18 10:48:13 2013 : Info: ++[suffix] returns noop
Wed Sep 18 10:48:13 2013 : Info: [eap] No EAP-Message, not doing EAP
Wed Sep 18 10:48:13 2013 : Info: ++[eap] returns noop
Wed Sep 18 10:48:13 2013 : Info: [sql]           expand: %{User-Name} -> 3037a616cd49
Wed Sep 18 10:48:13 2013 : Info: [sql] sql_set_user escaped user --> '3037a616cd49'
Wed Sep 18 10:48:13 2013 : Debug: rlm_sql (sql): Reserving sql socket id: 2
Wed Sep 18 10:48:13 2013 : Info: [sql]           expand: SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '%{SQL-User-Name}'           ORDER BY id -> SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '3037a616cd49'           ORDER BY id
Wed Sep 18 10:48:13 2013 : Debug: rlm_sql_mysql: query:  SELECT id, username, attribute, value, op           FROM radcheck           WHERE username = '3037a616cd49'           ORDER BY id
Wed Sep 18 10:48:13 2013 : Info: [sql] User found in radcheck table
Wed Sep 18 10:48:13 2013 : Info: [sql]           expand: SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '%{SQL-User-Name}'           ORDER BY id -> SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '3037a616cd49'           ORDER BY id
Wed Sep 18 10:48:13 2013 : Debug: rlm_sql_mysql: query:  SELECT id, username, attribute, value, op           FROM radreply           WHERE username = '3037a616cd49'           ORDER BY id
Wed Sep 18 10:48:13 2013 : Info: [sql]           expand: SELECT groupname           FROM radusergroup           WHERE username = '%{SQL-User-Name}'           ORDER BY priority -> SELECT groupname           FROM radusergroup           WHERE username = '3037a616cd49'           ORDER BY priority
Wed Sep 18 10:48:13 2013 : Debug: rlm_sql_mysql: query:  SELECT groupname           FROM radusergroup           WHERE username = '3037a616cd49'           ORDER BY priority
Wed Sep 18 10:48:13 2013 : Debug: rlm_sql (sql): Released sql socket id: 2
Wed Sep 18 10:48:13 2013 : Info: ++[sql] returns ok
Wed Sep 18 10:48:13 2013 : Info: ++[expiration] returns noop
Wed Sep 18 10:48:13 2013 : Info: ++[logintime] returns noop
Wed Sep 18 10:48:13 2013 : Info: ++[pap] returns updated
Wed Sep 18 10:48:13 2013 : Info: Found Auth-Type = PAP
Wed Sep 18 10:48:13 2013 : Info: # Executing group from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:13 2013 : Info: +- entering group PAP {...}
Wed Sep 18 10:48:13 2013 : Info: [pap] login attempt with password "3037a616cd49"
Wed Sep 18 10:48:13 2013 : Info: [pap] Using clear text password "3037a616cd49"
Wed Sep 18 10:48:13 2013 : Info: [pap] User authenticated successfully
Wed Sep 18 10:48:13 2013 : Info: ++[pap] returns ok
Wed Sep 18 10:48:13 2013 : Info: # Executing section post-auth from file /etc/raddb/sites-enabled/default
Wed Sep 18 10:48:13 2013 : Info: +- entering group post-auth {...}
Wed Sep 18 10:48:13 2013 : Info: ++[exec] returns noop
Sending Access-Accept of id 205 to 10.90.100.7 port 1645
Cisco-AVPair = "device-traffic-class=voice"
Wed Sep 18 10:48:13 2013 : Info: Finished request 1.
Wed Sep 18 10:48:13 2013 : Debug: Going to the next request
Wed Sep 18 10:48:13 2013 : Debug: Waking up in 4.9 seconds.
Wed Sep 18 10:48:18 2013 : Info: Cleaning up request 1 ID 205 with timestamp +84
Wed Sep 18 10:48:18 2013 : Info: Ready to process requests.
Thanks!

Answer 1

802.1X support    requires an authentication server that is configured for Remote    Authentication Dial-In User Service (RADIUS). 802.1X authentication does  not   work unless the network access switch can route packets to the  configured   RADIUS server.
Please check the  below links which can be helpful in configurations:
Link-1
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/50sg/configuration/guide/dot1x.html