Wired Intelligent Edge

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  • 1.  LLDP-MED and 802.1x

    Posted Feb 16, 2016 08:26 AM

    Hello all,

    I've configured a 5406zl to perform 802.1x authentication. This works fine: if a device gets authenticated, the port will be assigned to a VLAN defined by the RADIUS and if authentication failes, the VLAN is set to 101 (the "guest VLAN").

    Now I've added another VLAN (called VoIP) and enabled LLDP-MED for our IP-Phones. I plugged in one phone and it has full access to the VOIP-VLAN. But the phone as no valid 802.1x configuration.

    Here is a part from the config, I used port B1

    aaa authentication port-access eap-radius
    aaa port-access authenticator B1-B12
    aaa port-access authenticator B1-B12 unauth-vid 101
    aaa port-access authenticator active
    vlan 1
      name "DEFAULT_VLAN"
      no untagged B1-B12
      untagged A1-A18,A21-A24,B13-B24,Trk77
      ip address x.x.x.x 255.255.0.0
      ip igmp
      exit
    vlan 9
      name "VOIP"
      tagged A1-A18,A21-A24,B1-B24,Trk77
      no ip address
      qos dscp 101110
      voice
      exit
    vlan 101
      name "Extern"
      untagged B1-B12
      tagged Trk77
      no ip address
      exit

    The the authenticator state:

    show port-access authenticator

    Port Access Authenticator Status

    Port-access authenticator activated [No] : Yes
    Allow RADIUS-assigned dynamic (GVRP) VLANs [No] : No

    Auths/ Unauth Untagged Tagged % In RADIUS Cntrl
    Port Guests Clients VLAN VLANs Port COS Limit ACL Dir Port Mode
    ---- ------- ------- -------- ------ --------- ----- ------ ----- ----------
    B1 0/1 0 101 Yes No No No both 100FDx

    Any idea why the device has access to the VoIP-VLAN without authentication?

    Regards,
    FunnyDingo



  • 2.  RE: LLDP-MED and 802.1x

    Posted Feb 16, 2016 10:16 AM

    *facepalm* I found a solution (not sure if it's the "best practice", but works lika a charm)

    • Disabled LLDP-MED completely
    • Removed all ports tagged from VoIP VLAN
    • Create new rule in RADIUS which assignes VLAN-ID 9 for successful authentication of user "phone"