I've successfully configured a Cisco 3750G to perform the authenticator function of the 802.1x process. I have a test Win7 machine as a supplicant and a Windows 2008 server running NPS as the Authentication Server. The Win7 machine is able to successfully authenticate.
I've now hooked up a Cisco 7941 IP Phone in front of the Win7 machine, configured the switch with the swtichport voice vlan command, I plug it in and it is granted power, but the port quickly moves to a down state. After looking through the debug logs I believe the issue to be something with 802.1x trying to authentication on both the Access VLAN and the Voice VLAN. Is there a way to only perform 802.1x on the Access VLAN? and not the Voice?
Scenario:
{RADIUS} <----> {3750G} <-----> {Cisco 7941 Phone} <-----> {Win7 802.1x client}
I am currently testing on interface gi1/0/3, here is the interface config line:
interface GigabitEthernet1/0/3
description TestPort
switchport access vlan 100
switchport voice vlan 110
switchport mode access
authentication port-control auto
authentication periodic
authentication timer reauthenticate server
dot1x pae authenticator
spanning-tree portfast
auto qos voip cisco-phone
Some of the debugs from the 3750G
*Apr 21 13:44:04.045: %ILPOWER-7-DETECT: Interface Gi1/0/3: Power Device detected: IEEE PD
*Apr 21 13:44:04.322: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/3: Power granted
*Apr 21 13:44:07.811: dot1x-ev(Gi1/0/3): Interface state changed to UP
*Apr 21 13:44:07.811: dot1x_auth Gi1/0/3: initial state auth_initialize has enter
*Apr 21 13:44:07.811: dot1x-sm(Gi1/0/3): 0x0000003B:auth_initialize_enter called
*Apr 21 13:44:07.811: dot1x_auth Gi1/0/3: during state auth_initialize, got event 0(cfg_auto)
*Apr 21 13:44:07.811: @@@ dot1x_auth Gi1/0/3: auth_initialize -> auth_disconnected
*Apr 21 13:44:07.811: dot1x-sm(Gi1/0/3): 0x0000003B:auth_disconnected_enter called
*Apr 21 13:44:07.811: dot1x_auth Gi1/0/3: idle during state auth_disconnected
*Apr 21 13:44:07.811: @@@ dot1x_auth Gi1/0/3: auth_disconnected -> auth_restart
*Apr 21 13:44:07.811: dot1x-sm(Gi1/0/3): 0x0000003B:auth_restart_enter called
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Sending create new context event to EAP for 0x0000003B (0000.0000.0000)
*Apr 21 13:44:07.820: dot1x_auth_bend Gi1/0/3: initial state auth_bend_initialize has enter
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_bend_initialize_enter called
*Apr 21 13:44:07.820: dot1x_auth_bend Gi1/0/3: initial state auth_bend_initialize has idle
*Apr 21 13:44:07.820: dot1x_auth_bend Gi1/0/3: during state auth_bend_initialize, got event 16383(idle)
*Apr 21 13:44:07.820: @@@ dot1x_auth_bend Gi1/0/3: auth_bend_initialize -> auth_bend_idle
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_bend_idle_enter called
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Created a client entry (0x0000003B)
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Dot1x authentication started for 0x0000003B (0000.0000.0000)
*Apr 21 13:44:07.820: dot1x-ev:DOT1X Supplicant not enabled on GigabitEthernet1/0/3
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): Posting !EAP_RESTART on Client 0x0000003B
*Apr 21 13:44:07.820: dot1x_auth Gi1/0/3: during state auth_restart, got event 6(no_eapRestart)
*Apr 21 13:44:07.820: @@@ dot1x_auth Gi1/0/3: auth_restart -> auth_connecting
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_connecting_enter called
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_restart_connecting_action called
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): Posting RX_REQ on Client 0x0000003B
*Apr 21 13:44:07.820: dot1x_auth Gi1/0/3: during state auth_connecting, got event 10(eapReq_no_reAuthMax)
*Apr 21 13:44:07.820: @@@ dot1x_auth Gi1/0/3: auth_connecting -> auth_authenticating
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_authenticating_enter called
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_connecting_authenticating_action called
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): Posting AUTH_START for 0x0000003B
*Apr 21 13:44:07.820: dot1x_auth_bend Gi1/0/3: during state auth_bend_idle, got event 4(eapReq_authStart)
*Apr 21 13:44:07.820: @@@ dot1x_auth_bend Gi1/0/3: auth_bend_idle -> auth_bend_request
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_bend_request_enter called
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Sending EAPOL packet to group PAE address
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Role determination not required
*Apr 21 13:44:07.820: dot1x-registry:registry:dot1x_ether_macaddr called
*Apr 21 13:44:07.820: dot1x-ev(Gi1/0/3): Sending out EAPOL packet
*Apr 21 13:44:07.820: EAPOL pak dump Tx
*Apr 21 13:44:07.820: EAPOL Version: 0x3 type: 0x0 length: 0x0005
*Apr 21 13:44:07.820: EAP code: 0x1 id: 0x1 length: 0x0005 type: 0x1
*Apr 21 13:44:07.820: dot1x-packet(Gi1/0/3): EAPOL packet sent to client 0x0000003B (0000.0000.0000)
*Apr 21 13:44:07.820: dot1x-sm(Gi1/0/3): 0x0000003B:auth_bend_idle_request_action called
*Apr 21 13:44:09.791: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to up
*Apr 21 13:44:10.798: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to up
*Apr 21 13:44:36.844: dot1x-ev(Gi1/0/3): Interface state changed to DOWN
*Apr 21 13:44:36.844: dot1x-ev(Gi1/0/3): Deleting client 0x0000003B (0000.0000.0000)
*Apr 21 13:44:36.844: dot1x-ev:dot1x_supp_port_down: No DOT1X subblock found on GigabitEthernet1/0/3
*Apr 21 13:44:36.844: dot1x-ev:Delete auth client (0x0000003B) message
*Apr 21 13:44:36.844: dot1x-ev:Auth client ctx destroyed
*Apr 21 13:44:37.842: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to down
*Apr 21 13:44:38.841: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to down
Latest Interface Config:
interface GigabitEthernet1/0/3
switchport access vlan 105
switchport mode access
switchport voice vlan 110
srr-queue bandwidth share 1 30 35 5
priority-queue out
authentication control-direction in
authentication event fail action next-method
authentication host-mode multi-auth
authentication open
authentication order dot1x mab
authentication priority mab dot1x
mab
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
dot1x pae authenticator
spanning-tree portfast
service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY
Global configs
dad
Debugs:
show version
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 28 WS-C3750G-24PS 15.0(2)SE6 C3750-IPSERVICESK9-M
#show authentication sessions interface gi1/0/3
Interface: GigabitEthernet1/0/3
MAC Address: Unknown
IP Address: Unknown
Status: Authz Success
Domain: DATA
Security Policy: Should Secure
Security Status: Unsecure
Oper host mode: multi-auth
Oper control dir: in
Authorized By: Authentication Server
Vlan Policy: N/A
Session timeout: N/A
Idle timeout: N/A
Common Session ID: 0A6363FE0000001900347F3C
Acct Session ID: 0x00000020
Handle: 0x7A00001A
Runnable methods list:
Method State
dot1x Authc Success
mab Not run
#show dot1x all details
Sysauthcontrol Enabled
Dot1x Protocol Version 3
Dot1x Info for GigabitEthernet1/0/3
-----------------------------------
PAE = AUTHENTICATOR
QuietPeriod = 60
ServerTimeout = 0
SuppTimeout = 30
ReAuthMax = 2
MaxReq = 2
TxPeriod = 30
Dot1x Authenticator Client List Empty
show run | in dot1x
aaa authentication dot1x default group RADIUS
dot1x system-auth-control
Console
Oct 15 20:16:41.392: dot1x-ev(Gi1/0/3): Interface state changed to DOWN
Oct 15 20:16:41.400: dot1x-ev(Gi1/0/3): Deleting client 0x74000003 (0000.0000.0000)
Oct 15 20:16:41.400: dot1x-ev:dot1x_supp_port_down: No DOT1X subblock found on GigabitEthernet1/0/3
Oct 15 20:16:41.400: dot1x-ev:Delete auth client (0x74000003) message
Oct 15 20:16:41.400: dot1x-ev:Auth client ctx destroyedshut
Oct 15 20:16:42.180: %SWITCH_QOS_TB-5-TRUST_DEVICE_LOST: cisco-phone no longer detected on port Gi1/0/3, operational port trust state is now untrusted
Oct 15 20:16:43.363: %LINK-5-CHANGED: Interface GigabitEthernet1/0/3, changed state to administratively down
Oct 15 20:16:44.370: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state tno shut
SW1(config-if)#
Oct 15 20:16:47.801: %ILPOWER-7-DETECT: Interface Gi1/0/3: Power Device detected: IEEE PD
Oct 15 20:16:48.807: %ILPOWER-5-POWER_GRANTED: Interface Gi1/0/3: Power granted
Oct 15 20:16:48.916: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to down
Oct 15 20:16:50.124: dot1x-ev(Gi1/0/3): Interface state changed to UP
Oct 15 20:16:50.133: dot1x_auth Gi1/0/3: initial state auth_initialize has enter
Oct 15 20:16:50.133: dot1x-sm(Gi1/0/3): 0xD8000004:auth_initialize_enter called
Oct 15 20:16:50.133: dot1x_auth Gi1/0/3: during state auth_initialize, got event 1(cfg_force_auth)
Oct 15 20:16:50.133: @@@ dot1x_auth Gi1/0/3: auth_initialize -> auth_force_auth
Oct 15 20:16:50.133: dot1x-sm(Gi1/0/3): 0xD8000004:auth_force_auth_enter called
Oct 15 20:16:50.133: dot1x-ev(Gi1/0/3): Sending EAPOL packet to group PAE address
Oct 15 20:16:50.133: dot1x-ev(Gi1/0/3): Role determination not required
Oct 15 20:16:50.133: dot1x-registry:registry:dot1x_ether_macaddr called
Oct 15 20:16:50.133: dot1x-ev(Gi1/0/3): Sending out EAPOL packet
Oct 15 20:16:50.133: EAPOL pak dump Tx
Oct 15 20:16:50.133: EAPOL Version: 0x3 type: 0x0 length: 0x0004
Oct 15 20:16:50.133: EAP code: 0x3 id: 0x1 length: 0x0004
Oct 15 20:16:50.133: dot1x-packet(Gi1/0/3): dot1x_auth_txCannedStatus: EAPOL packet sent to client 0xD8000004 (0000.0000.0000)
Oct 15 20:16:50.133: dot1x_auth_bend Gi1/0/3: initial state auth_bend_initialize has enter
Oct 15 20:16:50.133: dot1x-sm(Gi1/0/3): 0xD8000004:auth_bend_initialize_enter called
Oct 15 20:16:50.133: dot1x_auth_bend Gi1/0/3: initial state auth_bend_initialize has idle
Oct 15 20:16:50.133: dot1x_auth_bend Gi1/0/3: during state auth_bend_initialize, got event 16383(idle)
Oct 15 20:16:50.133: @@@ dot1x_auth_bend Gi1/0/3: auth_bend_initialize -> auth_bend_idle
Oct 15 20:16:50.133: dot1x-sm(Gi1/0/3): 0xD8000004:auth_bend_idle_enter called
Oct 15 20:16:50.133: dot1x-ev(Gi1/0/3): Created a client entry (0xD8000004)
Oct 15 20:16:50.133: dot1x-ev(Gi1/0/3): Dot1x authentication started for 0xD8000004 (0000.0000.0000)
Oct 15 20:16:50.133: dot1x-ev:DOT1X Supplicant not enabled on GigabitEthernet1/0/3
Oct 15 20:16:50.141: dot1x-ev(Gi1/0/3): Sending event (2) to Auth Mgr for 0000.0000.0000
Oct 15 20:16:50.141: dot1x-redundancy: State for client 0000.0000.0000 successfully retrieved
Oct 15 20:16:52.113: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to up
Oct 15 20:16:53.119: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to up
Oct 15 20:17:34.542: %SWITCH_QOS_TB-5-TRUST_DEVICE_DETECTED: cisco-phone detected on port Gi1/0/3, port's configured trust state is now operational.
Port still ends up in a shutdown state, but supplies power to Phone…
Best Answer
You would need to configure MAB (Mac Auth Bypass) authentication for the ip phone in the multi-vlan interface. You also need multi-auth so the switch knows to look for more than one MAC address.
-authentication host-mode multi-auth
-authentication order mab dot1x