Converged Access 5760, 3850, and 3650 Series WLC EAP-FAST with Internal RADIUS Server Configuration Example

Introduction

This document describes how to configure the Cisco Converged Access 5760, 3850, and 3650 Series Wireless LAN Controllers (WLCs) in order to act as RADIUS servers that perform Cisco Extensible Authentication Protocol-Flexible Authentication via Secure Protocol (EAP-FAST, in this example) for client authentication.

Usually an external RADIUS server is used in order to authenticate users, which is not a feasible solution in some cases. In these situations, a Converged Access WLC can act as a RADIUS server, where users are authenticated against the local database that is configured in the WLC. This is called a Local RADIUS Server feature.

Prerequisites

Requirements

Cisco recommends that you have knowledge of these topics before you attempt this configuration:

• Cisco IOS^® GUI or CLI with the Converged Access 5760, 3850, and 3650 Series WLC
• Extensible Authentication Protocol (EAP) concepts
• Service Set Identifier (SSID) configuration
• RADIUS

Components Used

The information in this document is based on these software and hardware versions:

• Cisco 5760 Series WLC Release 3.3.2 (Next Generation Wiring Closet [NGWC])
• Cisco 3602 Series Lightweight Access Point (AP)
• Microsoft Windows XP with Intel PROset Supplicant
• Cisco Catalyst 3560 Series Switches

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Configure

Note: Use the Command Lookup Tool (registered customers only) in order to obtain more information on the commands used in this section.

Network Diagram

This image provides an example of a network diagram:

Configuration Overview

This configuration is completed in two steps:

1. Configure the WLC for the local EAP method and the related authentication and authorization profiles with the CLI or GUI.
   
   
2. Configure the WLAN and map the method list that has the authentication and authorization profiles.

Configure the WLC with the CLI

Complete these steps in order to configure the WLC with the CLI:

1. Enable the AAA model on the WLC:
   
   

   aaa new-model

2. Define the authentication and authorization:
   
   

   aaa local authentication eapfast authorization eapfast
   
   aaa authentication dot1x eapfast local
   aaa authorization credential-download eapfast local
   aaa authentication dot1x default local

3. Configure the local EAP profile and the method (EAP-FAST is used in this example):
   
   

   eap profile eapfast
    method fast
   !

4. Configure the advanced EAP-FAST parameters:
   
   

   eap method fast profile eapfast
    description test
    authority-id identity 1
    authority-id information 1
    local-key 0 cisco123

5. Configure the WLAN and map the local authorization profile to the WLAN:
   
   

   wlan eapfastlocal 13 eapfastlocal
    client vlan VLAN0020
    local-auth eapfast
    session-timeout 1800
    no shutdown

6. Configure the infrastructure in order to support the client connectivity:
   
   

   ip dhcp snooping vlan 12,20,30,40,50
   ip dhcp snooping
   !
   ip dhcp pool vlan20
    network 20.20.20.0 255.255.255.0
    default-router 20.20.20.251
    dns-server 20.20.20.251

   
   

   interface TenGigabitEthernet1/0/1
    switchport trunk native vlan 12
    switchport mode trunk
    ip dhcp relay information trusted
    ip dhcp snooping trust

Configure the WLC with the GUI

Complete these steps in order to configure the WLC with the GUI:

1. Configure the method list for Authentication:
   
   
   • Configure the eapfast Type as Dot1x.
     
     
   • Configure the eapfast Group Type as Local.
     
     
   
   
2. Configure the method list for Authorization:
   
   
   • Configure the eapfast Type as Credential-Download.
     
     
   • Configure the eapfast Group Type as Local.
     
     
   
   
3. Configure the Local EAP profile:
   
   
   
   
4. Create a new profile and select the EAP type:
   
   
   
   The Profile Name is eapfast and the selected EAP type is EAP-FAST:
   
   
   
   
5. Configure the EAP-FAST Method Parameters:
   
   
   
   The Server Key is configured as Cisco123.
   
   
   
   
6. Check the Dot1x System Auth Control check box and select eapfast for the Method Lists. This helps you to perform the local EAP authentication.
   
   
   
   
7. Configure the WLAN for WPA2 AES encryption:
   
   
   
   
   
   
8. On the AAA Server tab, map the EAP Profile Name eapfast to the WLAN:
   
   

Verify

Complete these steps in order to verify that your configuration works properly:

1. Connect the client to the WLAN:
   
   
   
   
2. Verify that the Protected Access Credentials (PAC) popup appears and that you must accept in order to successfully authenticate:
   
   

Troubleshoot

Cisco recommends that you use traces in order to troubleshoot wireless issues. Traces are saved in the circular buffer and are not processor intensive.

Enable these traces in order to obtain the Layer 2 (L2) auth logs:

• set trace group-wireless-secure level debug
  
  
• set trace group-wireless-secure filter mac0021.6a89.51ca
  
  

Enable these traces in order to obtain the DHCP events logs:

• set trace dhcp events level debug
  
  
• set trace dhcp events filter mac 0021.6a89.51ca
  
  

Here are some examples of successful traces:

[04/10/14 18:49:50.719 IST 3 8116] 0021.6a89.51ca Association received from
 mobile on AP  c8f9.f983.4260

[04/10/14 18:49:50.719 IST 4 8116] 0021.6a89.51ca qos upstream policy is
 unknown and downstream policy is unknown
[04/10/14 18:49:50.719 IST 5 8116] 0021.6a89.51ca apChanged 1 wlanChanged 0
 mscb ipAddr 20.20.20.6, apf RadiusOverride 0x0, numIPv6Addr=0
[04/10/14 18:49:50.719 IST 6 8116] 0021.6a89.51ca Applying WLAN policy on MSCB.
[04/10/14 18:49:50.719 IST 7 8116] 0021.6a89.51ca Applying WLAN ACL policies
 to client

[04/10/14 18:49:50.719 IST 9 8116] 0021.6a89.51ca Applying site-specific IPv6
 override for station  0021.6a89.51ca  - vapId 13, site 'default-group',
 interface 'VLAN0020'
[04/10/14 18:49:50.719 IST a 8116] 0021.6a89.51ca Applying local bridging
 Interface Policy for station  0021.6a89.51ca  - vlan 20, interface 'VLAN0020'
[04/10/14 18:49:50.719 IST b 8116] 0021.6a89.51ca STA - rates (8):
 140 18 152 36 176 72 96 108 48 72 96 108 0 0 0 0

[04/10/14 18:49:50.727 IST 2f 8116] 0021.6a89.51ca Session Manager Call Client
 57ca4000000048, uid 42, capwap id 50b94000000012,Flag 4, Audit-Session ID
 0a6987b253468efb0000002a, method list

[04/10/14 18:49:50.727 IST 30 22] ACCESS-CORE-SM-CLIENT-SPI-NOTF:
 [0021.6a89.51ca, Ca3] Session update from Client[1] for 0021.6a89.51ca,
 ID list 0x00000000
[04/10/14 18:49:50.727 IST 31 22] ACCESS-CORE-SM-CLIENT-SPI-NOTF:
 [0021.6a89.51ca, Ca3]  (UPD): method: Dot1X, method list: none, aaa id:
 0x0000002A
[04/10/14 18:49:50.727 IST 32 22] ACCESS-CORE-SM-CLIENT-SPI-NOTF:
 [0021.6a89.51ca, Ca3]  (UPD): eap profile: eapfast

[04/10/14 18:49:50.728 IST 4b 278] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 Posting AUTH_START for 0xF700000A
[04/10/14 18:49:50.728 IST 4c 278] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 0xF700000A:entering request state
[04/10/14 18:49:50.728 IST 4d 278] ACCESS-METHOD-DOT1X-NOTF:[0021.6a89.51ca,Ca3]
 Sending EAPOL packet
[04/10/14 18:49:50.728 IST 4e 278] ACCESS-METHOD-DOT1X-INFO:[0021.6a89.51ca,Ca3]
 Platform changed src mac  of EAPOL packet
[04/10/14 18:49:50.728 IST 4f 278] ACCESS-METHOD-DOT1X-INFO:[0021.6a89.51ca,Ca3]
 EAPOL packet sent to client 0xF700000A
[04/10/14 18:49:50.728 IST 50 278] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 0xF700000A:idle request action
[04/10/14 18:49:50.761 IST 51 8116] 0021.6a89.51ca 1XA: Received 802.11 EAPOL
 message (len 5) from mobile
[04/10/14 18:49:50.761 IST 52 8116] 0021.6a89.51ca 1XA: Received EAPOL-Start
 from mobile
[04/10/14 18:49:50.761 IST 53 8116] 0021.6a89.51ca 1XA:  EAPOL-Start -
 EAPOL start message from mobile as mobile is in Authenticating state, restart
 authenticating

[04/10/14 18:49:50.816 IST 95 278] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 0xF700000A:entering response state
[04/10/14 18:49:50.816 IST 96 278] ACCESS-METHOD-DOT1X-NOTF:[0021.6a89.51ca,Ca3]
 Response sent to the server from 0xF700000A
[04/10/14 18:49:50.816 IST 97 278] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 0xF700000A:ignore response action
[04/10/14 18:49:50.816 IST 98 203] Parsed CLID MAC Address = 0:33:106:137:81:202
[04/10/14 18:49:50.816 IST 99 203] AAA SRV(00000000): process authen req
[04/10/14 18:49:50.816 IST 9a 203] AAA SRV(00000000): Authen method=LOCAL

[04/10/14 18:49:50.846 IST 11d 181] ACCESS-CORE-SM-CLIENT-SPI-NOTF:
 [0021.6a89.51ca, Ca3] Session authz status notification sent to Client[1] for
 0021.6a89.51ca with handle FE000052, list 630007B2
[04/10/14 18:49:50.846 IST 11e 181]ACCESS-METHOD-DOT1X-NOTF:[0021.6a89.51ca,Ca3]
 Received Authz Success for the client 0xF700000A (0021.6a89.51ca)
[04/10/14 18:49:50.846 IST 11f 271] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 Posting AUTHZ_SUCCESS on Client 0xF700000A
[04/10/14 18:49:50.846 IST 120 271] ACCESS-METHOD-DOT1X-DEB:[0021.6a89.51ca,Ca3]
 0xF700000A:entering authenticated state
[04/10/14 18:49:50.846 IST 121 271]ACCESS-METHOD-DOT1X-NOTF:[0021.6a89.51ca,Ca3]
 EAPOL success packet was sent earlier.

[04/10/14 18:49:50.846 IST 149 8116] 0021.6a89.51ca 1XA:authentication succeeded
[04/10/14 18:49:50.846 IST 14a 8116] 0021.6a89.51ca 1XK: Looking for BSSID
 c8f9.f983.4263  in PMKID cache
[04/10/14 18:49:50.846 IST 14b 8116] 0021.6a89.51ca 1XK: Looking for BSSID
 c8f9.f983.4263  in PMKID cache
[04/10/14 18:49:50.846 IST 14c 8116] 0021.6a89.51ca Starting key exchange with
 mobile - data forwarding is disabled
[04/10/14 18:49:50.846 IST 14d 8116] 0021.6a89.51ca 1XA: Sending EAPOL message
 to mobile, WLAN=13 AP WLAN=13
[04/10/14 18:49:50.858 IST 14e 8116] 0021.6a89.51ca 1XA: Received 802.11 EAPOL
 message (len 123) from mobile
[04/10/14 18:49:50.858 IST 14f 8116] 0021.6a89.51ca 1XA: Received EAPOL-Key from
 mobile
[04/10/14 18:49:50.858 IST 150 8116] 0021.6a89.51ca 1XK: Received EAPOL-key in
 PTK_START state (msg 2) from mobile
[04/10/14 18:49:50.858 IST 151 8116] 0021.6a89.51ca 1XK: Stopping retransmission
 timer
[04/10/14 18:49:50.859 IST 152 8116] 0021.6a89.51ca 1XA: Sending EAPOL message
 to mobile, WLAN=13 AP WLAN=13
[04/10/14 18:49:50.862 IST 153 8116] 0021.6a89.51ca 1XA: Received 802.11 EAPOL
 message (len 99) from mobile
[04/10/14 18:49:50.862 IST 154 8116] 0021.6a89.51ca 1XA: Received EAPOL-Key from
 mobile
[04/10/14 18:49:50.862 IST 155 8116] 0021.6a89.51ca 1XK: Received EAPOL-key in
 PTKINITNEGOTIATING state (msg 4) from mobile

[04/10/14 18:49:50.863 IST 172 338] [WCDB] wcdb_ffcp_cb: client (0021.6a89.51ca)
 client (0x57ca4000000048): FFCP operation (UPDATE) return code (0)
[04/10/14 18:49:50.914 IST 173 273] dhcp pkt processing routine is called for pak
 with SMAC = 0021.6a89.51ca and SRC_ADDR = 0.0.0.0
[04/10/14 18:49:50.914 IST 174 219] sending dhcp packet outafter processing with
 SMAC = 0021.6a89.51ca and SRC_ADDR = 0.0.0.0
[04/10/14 18:49:50.914 IST 175 256] DHCPD: address 20.20.20.6 mask 255.255.255.0
[04/10/14 18:49:54.279 IST 176 273] dhcp pkt processing routine is called for pak
 with SMAC = 0021.6a89.51ca and SRC_ADDR = 20.20.20.6
[04/10/14 18:49:54.279 IST 177 219] sending dhcp packet outafter processing with
 SMAC = 0021.6a89.51ca and SRC_ADDR = 20.20.20.6