DHCP offering endlessly on Mikrotik and connected APs through Zyxel NSW200-28P switch

Matylda
Matylda Posts: 4  Freshman Member
First Comment First Anniversary
edited July 2024 in Nebula

When I connect my mikrotik APs through the Zyxel NSW200-28P with my Mikrotik router I cannot get DHCP bind with those devices even those connected through wireless network. All other connections via DHCP works on that switch, only the APs and wireless clients.

On other switch (TP-Link) it works flawlessly but I need PoE injector with separate power supply. That is the reason I want to use Zyxel switch

I have all management features disabled (STP, RSTP, LLDP, Storm Control etc.) only VLANs are enabled but they are working perfectly. In the event logs I see broadcast and multicast storm on the port that the router is connected into.

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  • Zyxel_Melen
    Zyxel_Melen Posts: 2,653  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate

    Hi @Matylda,

    May I know the VLAN setting on the AP connection ports and the router port? And which management VLAN and SSID VLAN are your AP using?

    Zyxel Melen


  • Matylda
    Matylda Posts: 4  Freshman Member
    First Comment First Anniversary

    The AP needs tagged packets for 200, 300 and 400 VLAN. It is already working on the TP-Link switch, but not on Zyxel.

    I have the port on Zyxel for AP set as it is in the attached screenshot below. Management VLAN is also 200. Uplink port is the same but is has also 500 set in the allowed VLANs which is used in other ports.

    Screenshot 2024-07-08 at 15.54.11.png

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,653  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    Answer ✓

    Hi @Matylda,

    May I know if the issue only occurred on the ports where PVID has been set to 200 and 500? If yes, please change the PVID to 1 since the switch will untag the VLAN ID of the packets when it matches your PVID.

    Zyxel Melen


  • Matylda
    Matylda Posts: 4  Freshman Member
    First Comment First Anniversary

    500 ports work, because they are left untagged. I changed the PVID of the ports that I want them to be tagged with 200 to 1 and it works now, but why does it untag when the PVID is set to the same VLAN? No other switch in my network does that.

  • Zyxel_Melen
    Zyxel_Melen Posts: 2,653  Zyxel Employee
    Zyxel Certified Network Engineer Level 1 - Switch Zyxel Certified Network Administrator - Switch Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate
    Answer ✓

    Hi @Matylda

    PVID = Cisco switchport trunk native vlan. For more details, you may reference the below FAQ:

    https://community.zyxel.com/en/discussion/10887/configuration-and-explanation-of-vlan-trunk-access-pvid-on-nebula-switch

    Zyxel Melen


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