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CCNP Wireless Security

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Answer 50 questions in 15 minutes.
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1. Steps to adding an IPS
1. Log into cert. server - from ACS -and click link to install it locally 2. Log into ACS and install cert into local store 3. DL cert chain from CA to ACS store 4. Tell ACS to use that cert from its store 5. restart ACS 6. log back into ACS and inst
1. VLAN Mapping 2. WLAN Ordering 3. WLAN Configuration
1. Create user acct. in IDS for each WLC in the viewer role 2. add the WLCs IP as an allowed host 3. Obtain the IPS TLS Fingerprint & add it to WLC 4. Enable the client exclusion policy on the WLAN 5. Set msg log level to Alerts to log IPS events
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages

2. How is the CAPWAP tunnel between AP & WLC encrypted
1. application type 2. security capabilities 3. QoS policy
x509v3 certificate
1. In-band virtual gateway -- is at L2 and intercepts all traffic and re-tags the default/untrusted vlan to the trusted vlan - based on compliance 2. In-Band Real IP Gateway - is the gateway 3. Out-of-band virtual gateway (same is 1 - except traffic
uses certificates

3. How does infrastructure MFP work
used with PEAP for user/password authentication
WLC generates a Message Integrity Check Information Element (MIC IE) - which includes a sequence # - and aps add it to each mgmt frame. Clients ignore this IE - as they do not understand it.
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
switchport mode access - dot1x pae authenticator - dot1x port-control auto

4. Briefly describe eap-mschapv2
1. NAC Guest Server (NGS) - Like a RADIUS server when people can create guest accounts 2. Nac Manager (NAM) - Centrilized server for creating policies & profiles that determine network access. 3. Network Access Server (NAS) - The device which control
used with PEAP for user/password authentication
1. RSSI 2. SNR 3. Load-Ballancing
802.11i - 802.11r - 802.11w & 802.11n

5. How fast is fast secure roaming
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
1812 - Authentication 1813 - Authorization
specifies fast bss transitions by allowing negotiations and requests for wireless resources to occur simultaneously. Does this by allowing for part of the key to be cached (server key) among the network - so full 802.1x auth. isnt required
-150ms

6. How does client MFP work
uses certificates
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
1 AP per 15 -000 sq. feet.

7. Steps to setting up out-of-band virtual gateway setup on the NAS & NAM
AES-Key Wrap
mititgate non-802.11 attacks
1. on NAS create an oob profile for the WLC 2. Create a new device in NAM - specifying the WLC mgmt ip 3. device mgmnt-->NAS & add the NAS ip as an oob virt. gateway 4. still on nams nas config page - enter the nas trusted int. ip & untrusted int vla
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)

8. Enhanced Neighbor list - E2E
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes
Allows intel clients to request a neighbor list at will.
DTLS (Datagram Transport Layer Security)

9. How is IBN implemented on a WLAN
checking allow aaa over-ride in the wlan-->advanced.
1. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate
EAP-FAST with anonymous pac provisioning
1. Log into cert. server - from ACS -and click link to install it locally 2. Log into ACS and install cert into local store 3. DL cert chain from CA to ACS store 4. Tell ACS to use that cert from its store 5. restart ACS 6. log back into ACS and inst

10. What must be configured the same for an HREAP not to disconnect clients when failing over (or back) to a WLC
1. VLAN Mapping 2. WLAN Ordering 3. WLAN Configuration
-150ms
1. Off (default) - moves down list and uses next server indefinately. 2. Passive -- Upon failure - server is marked as inactive for (300 seconds) then is put back in list and tried again (if its highest priority). 3. Active -- Actively probes failed
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.

11. Is data encrypted over a capwap tunnel?
1. client -> authenticator: eapol_start 2. authenticator -> client: eap request/identity 3. client -> authenticator: eap response/identity 4. authenticator -> aaa: radius access request 5. aaa -> client: eap-tls handshake 6.aaa -> authenticator: radi
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
1. config mobility list to support anchor & foreign wlcs (using different mob. groups on ea. to keep auth. seperate between anchor & foreigns) 2. Map the guest wlan on foreign wlc to either mgmt int. or fake dynamic int. (ie dynamic int tied to a vla
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config

12. Things to Enable in ACS (Global Authentication Page) for PEAP support
after authentication - the client & radius server cache session keys for a configurable amount of time
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.
puts the ap and client through tests to isolate connection issues. This disables the wlan while doing this. Can be used to diagnose .1x auth - .11 association etc. if using ccxv5
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC

13. When PKC is used
1. Log into cert. server - from ACS -and click link to install it locally 2. Log into ACS and install cert into local store 3. DL cert chain from CA to ACS store 4. Tell ACS to use that cert from its store 5. restart ACS 6. log back into ACS and inst
1. User performs .1x with RADIUS 2. WLC forwards radius accounting start to NAM (along with clients IP) 3. clients NAA detects network con. & tries to connect to NAM. 4. NAS Intercepts step 3 & contacts NAM itself to see if client is in the online li
Sends the PMK to all WLCs that the client can roam to.
what occurs as a client roams to new ap -WLC forwards cached PMK to AP. Client then forms a Pairwise Transient Key (PTK) via 4-way handshake w/ ap.

14. What CCX version is required for CCKM
Asymetric (public & Private key-pair)
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
no

15. Reason why you can NOT use WLC RADIUS server to auth. against OpenLDAP or Win-2003 (or later)
peap-mschapv2 - eap-tls - mfp-v1 - nac
1. User performs .1x with RADIUS 2. WLC forwards radius accounting start to NAM (along with clients IP) 3. clients NAA detects network con. & tries to connect to NAM. 4. NAS Intercepts step 3 & contacts NAM itself to see if client is in the online li
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
1. on NAS create an oob profile for the WLC 2. Create a new device in NAM - specifying the WLC mgmt ip 3. device mgmnt-->NAS & add the NAS ip as an oob virt. gateway 4. still on nams nas config page - enter the nas trusted int. ip & untrusted int vla

16. What must be configd on ACS to enable dot1x from switch
Sends the PMK to all WLCs that the client can roam to.
uses TLS to secure other eap methods like certs - user/pass - smart cards. Identifies itself to client with certificate. Utilizes: fast reconnect (faster roaming w/ key caching) and server authentication
1. application type 2. security capabilities 3. QoS policy
EAP-FAST with anonymous pac provisioning

17. Whats included in 802.11-2012
802.11i - 802.11r - 802.11w & 802.11n
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
dot1x system-auth-control - aaa new-model - aaa authentication dot1x default group radius - radius serve host 10.1.1.2 auth-port 1812 acct port 1813 key <key>
1. Captive Portal 2. NAA (agent installed on windows); auth twice (1 to radius 2 to nac) 3. NAA w/ SSO - user authss once. & wlc auths to nac on their behalf.

18. What kind of mgmt frames does client mfp protect
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
1. disassociation 2. deauthentication 3.QoS (WMM)
no
1 AP per 15 -000 sq. feet.

19. Steps to config. .1x for AP to WLC connections
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
1. Off (default) - moves down list and uses next server indefinately. 2. Passive -- Upon failure - server is marked as inactive for (300 seconds) then is put back in list and tried again (if its highest priority). 3. Active -- Actively probes failed
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS

20. What protocol to WLCs use to communicate with IPS
after authentication - the client & radius server cache session keys for a configurable amount of time
when you want some wlcs to be part of the same mobility group - but not others.
HTTPS
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>

21. Client Roaming Reasons
1. RSSI 2. SNR 3. Load-Ballancing
enables Identity Based Netowrking (IBN) where wlan settings are changed per-user (qos - vlan - acls - or timeouts)
checking allow aaa over-ride in the wlan-->advanced.
WLC generates a Message Integrity Check Information Element (MIC IE) - which includes a sequence # - and aps add it to each mgmt frame. Clients ignore this IE - as they do not understand it.

22. What must be configured for SSO authentication to work
1. client -> authenticator: eapol_start 2. authenticator -> client: eap request/identity 3. client -> authenticator: eap response/identity 4. authenticator -> aaa: radius access request 5. aaa -> client: eap-tls handshake 6.aaa -> authenticator: radi
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
Sends the PMK to all WLCs that the client can roam to.
on the WLC -1. Configure an Access vlan & check the quarentine vlan - giving it the quarentine vlan tag 2. on wired net connect the Quarenteen vlan to the untrusted NAS interface. 3. Connect the access vlan to the trusted int. on the nas 4. config sn

23. 3 categories of segmented traffic
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
AES-Key Wrap
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.
1. application type 2. security capabilities 3. QoS policy

24. What are virtual domains used for in WCS
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
1. config mobility list to support anchor & foreign wlcs (using different mob. groups on ea. to keep auth. seperate between anchor & foreigns) 2. Map the guest wlan on foreign wlc to either mgmt int. or fake dynamic int. (ie dynamic int tied to a vla
1. Create user acct. in IDS for each WLC in the viewer role 2. add the WLCs IP as an allowed host 3. Obtain the IPS TLS Fingerprint & add it to WLC 4. Enable the client exclusion policy on the WLAN 5. Set msg log level to Alerts to log IPS events

25. What triggers can initiate a WLC to request a client to roam
1. Min. RSSI 2. Roam Hysterisis - how much higher than current RSSI compared to neighbor ap RSSI before roaming request initiates 3. Scan Threshold - How low the current RSSI must be for the client to start scanning for a better ap 4. Transition Time
when you want some wlcs to be part of the same mobility group - but not others.
-150ms
dot1x system-auth-control - aaa new-model - aaa authentication dot1x default group radius - radius serve host 10.1.1.2 auth-port 1812 acct port 1813 key <key>

26. Vlan pooling
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
Security --> Advanced --> CIDS --> Sensors
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network

27. IAPP roaming protocol
clients are load ballanced between them - this can not be configured otherwise.
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams
WLC can detect 802.11 attacks - but not other attacks from valid wireless clients.
MFP

28. What is NGS & whats it used for
1. HMAC-MD5 2. HMAC-SHA
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
switchport mode access - dot1x pae authenticator - dot1x port-control auto
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS

29. Steps to setting up an out-of-band virtual gateway NAS setup
on the WLC -1. Configure an Access vlan & check the quarentine vlan - giving it the quarentine vlan tag 2. on wired net connect the Quarenteen vlan to the untrusted NAS interface. 3. Connect the access vlan to the trusted int. on the nas 4. config sn
uses certificates
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address

30. WLC Tacacs+ roles
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
enables Identity Based Netowrking (IBN) where wlan settings are changed per-user (qos - vlan - acls - or timeouts)
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID
Corrospond to top-menu GUI items (wireless - security - monitor etc)

31. What ports does OEAP use to connect to anchor WLC
1. client -> authenticator: eapol_start 2. authenticator -> client: eap request/identity 3. client -> authenticator: eap response/identity 4. authenticator -> aaa: radius access request 5. aaa -> client: eap-tls handshake 6.aaa -> authenticator: radi
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
UDP 5246 & 5247

32. When submitting a CSR from ACS
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store
1812 - Authentication 1813 - Authorization
x509 cert to establish DTLS capwap control tunnel. It can be either 1. LSC 2. MIC (Mafctr installed cert) or 3. SSC
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.

33. What is Ciscos gold confidence level deployment of wIPS aps in a walled environment
WLC sends a roam-request to a client when it can better serve that client on a different AP. Client can accept or ignore. CCXv4+
1 AP per 15 -000 sq. feet.
used with PEAP for user/password authentication
1. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic

34. How to set up tacacs roles in ACS for WLC authorization
1. HMAC-MD5 2. HMAC-SHA
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

35. What does IBN allow you to assign
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

36. Methods for authenticating to NAC
1. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic
after authentication - the client & radius server cache session keys for a configurable amount of time
1. Captive Portal 2. NAA (agent installed on windows); auth twice (1 to radius 2 to nac) 3. NAA w/ SSO - user authss once. & wlc auths to nac on their behalf.
Clients send info re: previously associated aps to current ap - so it can use this information to inform current clients about neighboring aps. Requires CCXv2

37. What does a wired IPS do compared to the WLC IDS
mititgate non-802.11 attacks
a mobility list can contain multiple mobility groups
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
1. PMK is only valid for 1 hour -- CCKM creates a main key & derives secondary keys. These secondary keys are sent to all wlc/aps.

38. Switchport config to enable dot1x on a port
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
switchport mode access - dot1x pae authenticator - dot1x port-control auto
WLC can detect 802.11 attacks - but not other attacks from valid wireless clients.

39. What part of an 802.11 Beacon contains the security mechanisms in use
after authentication - the client & radius server cache session keys for a configurable amount of time
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
-150ms
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.

40. How is IBN-QoS
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
300ms
ACL - or Interface-name configured in ACS -1. Interface Configuration --> RADIUS (Cisco Airspace) and check off: Air-Qos-Level - Aire-DSCP - Aire-802.1p tag - Aire-Interface-name - Air-ACL-Name
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.

41. Steps to installing Server Cert into ACS
1. config mobility list to support anchor & foreign wlcs (using different mob. groups on ea. to keep auth. seperate between anchor & foreigns) 2. Map the guest wlan on foreign wlc to either mgmt int. or fake dynamic int. (ie dynamic int tied to a vla
Sends the PMK to all WLCs that the client can roam to.
1. Log into cert. server - from ACS -and click link to install it locally 2. Log into ACS and install cert into local store 3. DL cert chain from CA to ACS store 4. Tell ACS to use that cert from its store 5. restart ACS 6. log back into ACS and inst
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams

42. What is included in a Pairwise Transient Key (PTK)
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
ACL - or Interface-name configured in ACS -1. Interface Configuration --> RADIUS (Cisco Airspace) and check off: Air-Qos-Level - Aire-DSCP - Aire-802.1p tag - Aire-Interface-name - Air-ACL-Name
802.11i - 802.11r - 802.11w & 802.11n
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.

43. How to add IPS TLS info to WLC
1. HMAC-MD5 2. HMAC-SHA
Security --> Advanced --> CIDS --> Sensors
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config
MFP

44. Steps to auth with NAA w/ SSO
1. client begins in Quarenteen vlan & NAA sends posture assesment to NAS 2. assesment is verified against policies in NAM 3. If in compliance - client is moved to access vlan. If not - NAS sends remediation info to client 4 NAA guides user through re
1. Create user acct. in IDS for each WLC in the viewer role 2. add the WLCs IP as an allowed host 3. Obtain the IPS TLS Fingerprint & add it to WLC 4. Enable the client exclusion policy on the WLAN 5. Set msg log level to Alerts to log IPS events
1. User performs .1x with RADIUS 2. WLC forwards radius accounting start to NAM (along with clients IP) 3. clients NAA detects network con. & tries to connect to NAM. 4. NAS Intercepts step 3 & contacts NAM itself to see if client is in the online li
uses TLS to secure other eap methods like certs - user/pass - smart cards. Identifies itself to client with certificate. Utilizes: fast reconnect (faster roaming w/ key caching) and server authentication

45. What is 802.11w?
enables Identity Based Netowrking (IBN) where wlan settings are changed per-user (qos - vlan - acls - or timeouts)
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
MFP

46. What is HREAP Local Auth limitation
Corrospond to top-menu GUI items (wireless - security - monitor etc)
100 local accounts max
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC

47. 6 criteria types for rogue classification
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID
no
1. PMK is only valid for 1 hour -- CCKM creates a main key & derives secondary keys. These secondary keys are sent to all wlc/aps.
1. on NAS create an oob profile for the WLC 2. Create a new device in NAM - specifying the WLC mgmt ip 3. device mgmnt-->NAS & add the NAS ip as an oob virt. gateway 4. still on nams nas config page - enter the nas trusted int. ip & untrusted int vla

48. Peap fast reconnect
after authentication - the client & radius server cache session keys for a configurable amount of time
1. Create user acct. in IDS for each WLC in the viewer role 2. add the WLCs IP as an allowed host 3. Obtain the IPS TLS Fingerprint & add it to WLC 4. Enable the client exclusion policy on the WLAN 5. Set msg log level to Alerts to log IPS events
uses TLS to secure other eap methods like certs - user/pass - smart cards. Identifies itself to client with certificate. Utilizes: fast reconnect (faster roaming w/ key caching) and server authentication
puts the ap and client through tests to isolate connection issues. This disables the wlan while doing this. Can be used to diagnose .1x auth - .11 association etc. if using ccxv5

49. NAC Deployment Types
1. In-band virtual gateway -- is at L2 and intercepts all traffic and re-tags the default/untrusted vlan to the trusted vlan - based on compliance 2. In-Band Real IP Gateway - is the gateway 3. Out-of-band virtual gateway (same is 1 - except traffic
Corrospond to top-menu GUI items (wireless - security - monitor etc)
Proactive Key Caching (PKC) or CCKM
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS

50. Briefly describe eap-tls
uses certificates
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
switchport mode access - dot1x pae authenticator - dot1x port-control auto