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New Member

Dynamic VLAN assignments with ACS

Hello all.

I am trying to do dynamic vlan assignments with dot1x auth.  I am using ACS5.3 and Cisco 3560.

I have configured them correctly to the best of my knowledge but it doesn't seem to be working correctly.

aaa group server radius nac_servers

server-private 84.93.219.163 auth-port 1812 acct-port 1813 key 7 xxxxxx

aaa authentication dot1x default group nac_servers

aaa authorization network default group nac_servers

interface FastEthernet0/2

switchport mode access

switchport voice vlan 364

srr-queue bandwidth share 10 10 60 20

srr-queue bandwidth shape 10 0 0 0

priority-queue out

authentication event no-response action authorize vlan 303

authentication host-mode multi-domain

authentication port-control auto

mls qos trust cos

auto qos voip trust

dot1x pae authenticator

When the user connects I get the following via debug:

Apr 30 15:19:36.303: %AUTHMGR-5-VLANASSIGN: VLAN 300 assigned to Interface Fa0/2 AuditSessionID 000000000000001F8B7214D7

However "show int status" still shows the port on vlan 1 and the end device is stuck with a 169.x.x.x address (Windows PC).

Any idea what config I'm missing?

Thanks

Paul

Everyone's tags (2)
6 REPLIES
New Member

Dynamic VLAN assignments with ACS

Can you please post full logs not just this line.

thanks

New Member

Dynamic VLAN assignments with ACS

Hello.

Here is whats left in the log.

Apr 30 15:19:36.253: dot1x-ev:Enqueued the eapol packet to the global authenticator queue
Apr 30 15:19:36.253: EAPOL pak dump rx
Apr 30 15:19:36.253: EAPOL Version: 0x1  type: 0x0  length: 0x007B
Apr 30 15:19:36.253: dot1x-ev:
dot1x_auth_queue_event: Int Fa0/2 CODE= 2,TYPE= 25,LEN= 123

Apr 30 15:19:36.253: dot1x-ev(Fa0/2): Received pkt saddr =70cd.6066.988a , daddr = 0180.c200.0003,
                    pae-ether-type = 888e.0100.007b
Apr 30 15:19:36.253: dot1x-ev(Fa0/2): dot1x_sendRespToServer: Response sent to the server from 0x55000021 (70cd.6066.988a)
Apr 30 15:19:36.269: dot1x-ev(Fa0/2): Sending EAPOL packet to 70cd.6066.988a
Apr 30 15:19:36.269: dot1x-ev(Fa0/2): Role determination not required
Apr 30 15:19:36.278: dot1x-ev(Fa0/2): Sending out EAPOL packet
Apr 30 15:19:36.278: dot1x-ev(Fa0/2): Role determination not required
Apr 30 15:19:36.278: dot1x-ev:Enqueued the eapol packet to the global authenticator queue
Apr 30 15:19:36.278: EAPOL pak dump rx
Apr 30 15:19:36.278: EAPOL Version: 0x1  type: 0x0  length: 0x002B
Apr 30 15:19:36.278: dot1x-ev:
dot1x_auth_queue_event: Int Fa0/2 CODE= 2,TYPE= 25,LEN= 43

Apr 30 15:19:36.286: dot1x-ev(Fa0/2): Received pkt saddr =70cd.6066.988a , daddr = 0180.c200.0003,
                    pae-ether-type = 888e.0100.002b
Apr 30 15:19:36.286: dot1x-ev(Fa0/2): dot1x_sendRespToServer: Response sent to the server from 0x55000021 (70cd.6066.988a)
Apr 30 15:19:36.286: dot1x-ev(Fa0/2): Sending EAPOL packet to 70cd.6066.988a
Apr 30 15:19:36.286: dot1x-ev(Fa0/2): Role determination not required
Apr 30 15:19:36.294: dot1x-ev(Fa0/2): Sending out EAPOL packet
Apr 30 15:19:36.294: dot1x-ev(Fa0/2): Role determination not required
Apr 30 15:19:36.294: dot1x-ev:Enqueued the eapol packet to the global authenticator queue
Apr 30 15:19:36.294: EAPOL pak dump rx
Apr 30 15:19:36.294: EAPOL Version: 0x1  type: 0x0  length: 0x002B
Apr 30 15:19:36.294: dot1x-ev:
dot1x_auth_queue_event: Int Fa0/2 CODE= 2,TYPE= 25,LEN= 43

Apr 30 15:19:36.294: dot1x-ev(Fa0/2): Received pkt saddr =70cd.6066.988a , daddr = 0180.c200.0003,
                    pae-ether-type = 888e.0100.002b
Apr 30 15:19:36.294: dot1x-ev(Fa0/2): dot1x_sendRespToServer: Response sent to the server from 0x55000021 (70cd.6066.988a)
Apr 30 15:19:36.303: %DOT1X-5-SUCCESS: Authentication successful for client (70cd.6066.988a) on Interface Fa0/2 AuditSessionID 000000000000001F8B7214D7
Apr 30 15:19:36.303: dot1x-ev(Fa0/2): Sending event (2) to Auth Mgr for 70cd.6066.988a
Apr 30 15:19:36.303: %AUTHMGR-7-RESULT: Authentication result 'success' from 'dot1x' for client (70cd.6066.988a) on Interface Fa0/2 AuditSessionID 000000000000001F8B7214D7
Apr 30 15:19:36.303: %AUTHMGR-5-VLANASSIGN: VLAN 300 assigned to Interface Fa0/2 AuditSessionID 000000000000001F8B7214D7
Apr 30 15:19:37.167: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
Apr 30 15:19:37.335: %AUTHMGR-5-SUCCESS: Authorization succeeded for client (70cd.6066.988a) on Interface Fa0/2 AuditSessionID 000000000000001F8B7214D7
Apr 30 15:19:37.335: dot1x-ev(Fa0/2): Received Authz Success for the client 0x55000021 (70cd.6066.988a)
Apr 30 15:19:37.335: dot1x-ev(Fa0/2): Sending EAPOL packet to 70cd.6066.988a
Apr 30 15:19:37.335: dot1x-ev(Fa0/2): Role determination not required
Apr 30 15:19:37.335: dot1x-ev(Fa0/2): Sending out EAPOL packet

Hope that helps

Dynamic VLAN assignments with ACS

Please run "debug radius authentication" I would like to see the av-pairs that are sent back from the radius server.

When you issue a show vlan, does vlan 300 exist in the vlan database?

Thanks

Tarik Admani

Tarik Admani *Please rate helpful posts*
New Member

Dynamic VLAN assignments with ACS

I'll run the debug tomorrow if I get chance.

Yes VLAN 300 is being used on other ports.  If I set the port to be on vlan 300 everything else about the 802.1x auth works fine.

New Member

Dynamic VLAN assignments with ACS

I've changed the host mode to multi-host rather than domain.  Although I will be going through a VoIP phone eventually I was not as the time and I can only assume that was the issue.

Dynamic VLAN assignments with ACS

Hi Paul,

Can send us the ACS Configuration and Switch configuration , to see what went wrrong.

Thanks and Regards

Kiran Kumar CH

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