Access port and Trunk port

[pipkin231]

Hi

 I have a Meraki firewall which the  3 x ethernet ports is configured as access port (assigned to different vlan ) which connected to another switch 3 x ports configured default as trunk .The switch has default vlan only. Will this cause a loop ?

The issue  is certain wireless network configured on Meraki firewall is unable to connect any mobile devices as it cannot grab ip address . When we disconnect the Meraki firewall from the switch , the mobile devices is able connect again.

[paul driver]

Hello

Are you saying the ports on the MX are in access mode and the switch and its ports attaching to those MX ports are in trunk mode?

If so then no traffic will even travese the links between the MX fw and the switch.

Where does the accces point connect - MX or switch?
Is the switch and the AP meraki also?

Possible suggestion -
Mx to Switch <-> 1 port set as trunk
Ap to MX or switch <-> 1 port set as trunk ( also poe i assume)
All other switchports on switch -> access mode

[pipkin231]

hi

 It MX64 firewall. No AP is connected to switch. IT 3 in 1 .(router,firewall,wifi)

[Julio E. Moisa]

Hi

Both devices should work with access ports or trunk port but not mixing. Now you could use just one port on both devices. My suggestion is configure this port as trunk and pass through the 3 VLANs, it on both devices MX and Switch.

[pipkin231]

With existing set up , will it cause a loop ? We have configured a SSID in firewall. Seemed like mobile device cant grab ip address when connected to  the ssid, When we disconnect the firewall from switch , it able to connect and and grab ip address. We are wondering why.

There is  two pc connected to the port on the switch which configured as trunk/

[paul driver]

Hello

i cannot tell as you have not confirmed the queries I posted earlier- but it sounds like it shouldn’t 

Now where is the the access point connected to

FW or switch?

I am assuming  Fw is doing the routing and Dhcp allocation ?

1) if so then connect the switch to the Fw via a trunk port on either side 

2) connect the AP to a port on either the switch or Fw as a trunk on either side also 

3) all other ports in the switch assign in access mode

[pipkin231]

Hi
The firewall is the AP. And yes it act as router, dhcp, and AP.

[paul driver]

Hello

Okay then trunk the connection between the MX and the switch and then set all other switchports to access mode - Then  test a user again

Can you also confirm what address mode the SSID's are set to or what ip addressing the wifi users are receiving? - Is from a 10.0.0.0/8 address range or from the correct L3 interfaces you created on the MX?

[Julio E. Moisa]

An access port connected to a trunk port will not work, now if you have multiple ports and they are configured as access or trunk (not mixed) you should not have any loop if the spanning tree protocol is configured correctly.