802.1x认证不通过

进行远端802.1x认证，接入设备始终不和RADIUS服务交互报文。RADIUS服务器是我司IMC配置的。接入设备是HP 5130-24G-PoE+-4SFP+ (370W) EI。

接入设备能ping通服务器，接入设备上RADIUS配置没有问题。

RADIUS scheme name: 123
  Index: 4
  Primary Auth Server:
    Host name: Not Configured
    IP  : 20.1.1.1                                 Port: 1812   State: Active
    VPN : Not configured                
  Primary Acct Server:
    Host name: Not Configured
    IP  : 20.1.1.1                                 Port: 1813   State: Active
    VPN : Not configured                

debugging RADIUS 后，没有产生RADIUS报文。

debugging  dot1x后，

*Jan  8 21:37:38:050 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Idle state.
*Jan  8 21:37:38:050 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Aborting state.
*Jan  8 21:37:38:051 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Initialize state.
*Jan  8 21:37:38:051 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Disconnect state.
*Jan  8 21:37:38:051 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Idle state.
*Jan  8 21:37:38:052 2013 HP DOT1X/7/EVENT: PORT_SM[GE1/0/1] received event DOT1X_PSM_E_USER_UNAUTHORED.
*Jan  8 21:38:19:474 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] Processing new mac event .
*Jan  8 21:38:19:476 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Disconnect state.
*Jan  8 21:38:19:476 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Initialize state.
*Jan  8 21:38:19:477 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Restart state.
*Jan  8 21:38:19:477 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Idle state.
*Jan  8 21:38:19:478 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Connecting state.
*Jan  8 21:38:19:478 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] PAE is in Authenticating state.
*Jan  8 21:38:19:479 2013 HP DOT1X/7/EVENT: [b4b6-861e-d3e1:VLAN2:GE1/0/1] BE is in Request state.
*Jan  8 21:38:19:479 2013 HP DOT1X/7/EVENT: Sending EAP Packet (identifier 1, type 1)
*Jan  8 21:38:19:480 2013 HP DOT1X/7/PACKET:

所以为啥不能和服务器交互RADIUS报文？还有就是PAE，BE这些是啥，在配置指导上没有说过这些