ExtremeSwitching (EOS)

  • 1.  Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 07-29-2016 11:37
    I need a help as the Cisco IP phone couldn't obtain the voice vlan by LLDP,
    the IP phone model=7911G, it's firmware=9.2.1
    Extreme switch: 800-series verson 1.3.4

    I made the following configuration but nothing work (IP phone connected to port 15)

    # VLAN

    config vlan default add untagged 9-16
    config vlan default advertisement enable
    create vlan 30 tag 30
    config vlan 30 add tagged 15 advertisement enable
    disable qinq
    disable gvrp
    disable vlan_trunk
    config port_vlan 9-16 gvrp_state disable ingress_checking enable acceptable_frame admit_all pvid 1

    # LLDP

    enable lldp
    config lldp tx_delay 2
    config lldp message_tx_interval 30
    config lldp message_tx_hold_multiplier 4
    config lldp reinit_delay 2
    config lldp notification_interval 5
    config lldp ports 9-14,16 notification disable
    config lldp ports 9-16 admin_status tx_and_rx
    config lldp ports 15 notification enable

    # LLDP-MED

    config lldp_med log state enable
    config lldp_med fast_start repeat_count 4
    config lldp_med ports 15 med_transmit_capabilities capabilities network_policy state enable


  • 2.  RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 08-01-2016 12:27
    Hello Hossam,

    Can you add the following line to the configuration and re-test:

    config lldp_med network_policy add app_type voice vlan vlan_id 30 t_field tagged


  • 3.  RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 08-01-2016 14:08
    Hossam has also logged a case with the Gtac which I am working on.
    In the tech-support the voice vlan is called voice1 with a tag of 3
    And the configuration has the following line:-

    config lldp_med network_policy add app_type voice vlan vlan_id 3 t_field tagged l2_pri_field 0 dscp_field 0

    The network capture attached to the case shows that the switch is sending out a network policy for vlan ID 3 but the capture was not started at the very begining.

    I have spoken to Hossam and I will work directly with him on this case and I will update this post later.


  • 4.  RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 08-01-2016 16:21
    Do you mean you need to see the packet caputre after connect the cables with the mirror port


  • 5.  RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 08-01-2016 18:05
    I mean it looks like the capture may of been started after the Cisco IP phone was already connected. Therefore to ensure that we have captured everything I would like you to gather another capture. I will call you tomorrow morning and run through the steps.


  • 6.  RE: Cisco IP phone couldn't obtain voice vlan from Enterasys switch

    Posted 08-12-2016 12:32
    For the configuration of VoIP phones on 800 Series switches see the following article:-

    https://gtacknowledge.extremenetworks.com/articles/Q_A/LLDP-MED-configuration-for-800-series-switch

    We have tested various VoIP phones such as Siemens (Unify) and Polycom CX600.
    Regarding the issue with the Cisco 7911G I am continuing to work with Hossam via a Gtac case.