Click on Security & SD-WAN / Addressing & VLANs
![cmr_1-1627320535297.png cmr_1-1627320535297.png](https://community.meraki.com/t5/image/serverpage/image-id/19442i3618DFFA75CE6827/image-size/medium?v=v2&px=400)
Scroll down to Routing and click on Single LAN settings, you will get a box as below, choose a new MX IP and matching Subnet, the press Update
![cmr_0-1627320497792.png cmr_0-1627320497792.png](https://community.meraki.com/t5/image/serverpage/image-id/19441iCC6737859B40B11A/image-size/medium?v=v2&px=400)
If my answer solves your problem please click Accept as Solution so others can benefit from it.