No DHCP issued to clients connected to wireless AP.

  • 0
  • 1
  • Question
  • Updated 3 months ago
  • Answered
I have replaced an Enterasys switch with a new X440G2-48p everything works fine except when devices connect to a Ruckus AP attached to the switch the devices do not obtain IP addresses.

Any help greatly appreciated.
Photo of Baz


  • 130 Points 100 badge 2x thumb

Posted 3 months ago

  • 0
  • 1
Photo of Eric Burke

Eric Burke

  • 3,288 Points 3k badge 2x thumb
Baz, can you show the configuration of the ports connected to the AP both pre and post-switch swap? On the newer switch "sho port x info detail" where x is the port should provide everything. Also, where is DHCP being delivered from? I'm assuming that the ruckus and DHCP were working in the prior environment (not new to the environment)?

Photo of Baz


  • 130 Points 100 badge 2x thumb
Hi Ric

Thanks for the reply the AP was working fine prior to changing the switch, DHCP comes via our DHCP server in our DC downstairs, I have taken the AP off the ceiling and plugged it into a spare port at my desk and it works fine when clients connect they get an IP address without issue (different switch) Unfortunately I do not have the config for the Enterasys as it has been utilized elsewhere after wiping it.

Port detail below AP is set up on the DATA vlan

# show port 47 info detail
Port:   47
        Virtual-router: VR-Default
        Type:           UTP
        Redundant Type: NONE
        Random Early drop:      Unsupported
        Admin state:    Enabled
        Copper Medium Configuration:     auto-speed sensing  auto-duplex auto-polarity on
        Fiber Medium Configuration:      auto-speed sensing  auto-duplex
        Link State:     Active, 1Gbps, full-duplex
        Link Ups:       11       Last: Tue Jul 31 00:30:00 2018
        Link Downs:     10       Last: Tue Jul 31 00:29:57 2018

        VLAN cfg:
                 Name: DATA, Internal Tag = 1, MAC-limit = No-limit, Virtual router:   VR-Default
                 Name: VOICE, 802.1Q Tag = 4, MAC-limit = No-limit, Virtual router:   VR-Default
                       Port-specific VLAN ID:    4
        STP cfg:

                 Name: DATA         Protocol: ANY      Match all protocols.
        Trunking:       Load sharing is not enabled.

        EDP:            Enabled

        EEE:            Disabled
        ELSM:           Disabled
        Ethernet OAM:           Disabled
        Learning:       Enabled
        Unicast Flooding:       Enabled
        Multicast Flooding:     Enabled
        Broadcast Flooding:     Enabled
        Jumbo:          Disabled
        Flow Control:   Rx-Pause: Enabled       Tx-Pause: Disabled
        Priority Flow Control: Disabled
        Reflective Relay:       Disabled
        Link up/down SNMP trap filter setting:  Enabled
        Egress Port Rate:       No-limit
        Broadcast Rate:         No-limit
        Multicast Rate:         No-limit
        Unknown Dest Mac Rate:  No-limit
        QoS Profile:    None configured
        Ingress Rate Shaping :          Unsupported
        Ingress IPTOS Examination:      Disabled
        Ingress 802.1p Examination:     Enabled
        Ingress 802.1p Inner Exam:      Disabled
        Ingress 802.1p Priority:        0
        Egress IPTOS Replacement:       Disabled
        Egress 802.1p Replacement:      Disabled
        NetLogin:                       Disabled
        NetLogin port mode:             Port based VLANs
        Smart redundancy:               Enabled
        Software redundant port:        Disabled
        IPFIX:   Disabled               Metering:  Ingress, All Packets, All Traffic
                IPv4 Flow Key Mask:     SIP:            DIP:
                IPv6 Flow Key Mask:     SIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
                                        DIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

        auto-polarity:                  Enabled
        Preferred medium:               Fiber
        Shared packet buffer:           default
        VMAN CEP egress filtering:      Disabled
        Isolation:                      Off
        PTP Configured:                 Disabled
        Time-Stamping Mode:             None

        Dynamic VLAN Uplink:            Disabled
        VM Tracking Dynamic VLANs:      Disabled

Photo of Baz


  • 130 Points 100 badge 2x thumb
Hi anyone any idea at all why this is happening? 
Photo of Ronald Dvorak

Ronald Dvorak, Embassador

  • 50,154 Points 50k badge 2x thumb
Could you please connect the client again to the SSID and then run the following on the switch....

show port 47 vlan
show fdb | i 47

Also please provide the AP and client MAC.