Source IP and/or VLAN mismatch MX84

[Trust]

Hello people,
has anyone ever seen these errors and can tell me the reason?
The errors always occur at XX:29:25 and XX:09:25.

- The clients are all configured to DHCP.

- The VLANs are configured Layer 3 on the switches.
- The DHCP server is on the MX84 (relay).

Here is the configuration of the switch ports

Thank you

[alemabrahao]

Are you 100% sure that no machine is configured with static IP?

Have you tried to check which ports of the Switches are connected to the source MAC?

[ww]

Did you set the dhcp server to give out the  switch svi-ip as router/gateway 

[RaphaelL]

1- Does 10.201.10.76 belongs to vlan 340 ? RPF checks are failing. refer to the documentation below

2- The reason why it shows every 30 mins : Every 30 minutes, the top 3 offending clients are logged on dashboard in Network-wide > Event Log. These events are visible in the event log after filtering for Source IP and/or VLAN mismatch. 

3- Last resort you can disable the IP spoofing to temporarly allow the trafic.

https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/IP_Source_Address_Spoofing_Protecti...

[Trust]

Hi guys and thanks for your answers.
I have followed these instructions.
https://documentation.meraki.com/MS/Layer_3_Switching/Layer_3_Switch_Example

This is my Transit VLAN

and on the Switch

as an example the VLAN 340 on the switch. As DHCP Relay I have chosen the Transit VLAN

This is my static route on the MX

and the DHCP server on the MX

this is my configuration for the switchport

this way I have created three VLANs on the switch and DHCP servers on the MX.

I am not sure where my mistake is.

I hope I have described everything understandably and you can help me.

Thanks a lot

[Trust]

any idea?

[alemabrahao]

Are you 100% sure that no machine is configured with static IP?

Have you tried to check which ports of the Switches are connected to the source MAC?