No networking on LXC after changing to static IP

[ErniePantuso]

Here's my situation: My Proxmox server is on VLAN 10 (BIZ VLAN) with an IP of 10.1.10.10. I created an LXC to host an Omada controller and by default it gets a 10.1.10.11 IP address from the Proxmox server/host. With that IP, it can access the internet, ping google.com, 8.8.8.8 (and others), the Proxmox server, anything. Problem is, the Omada controller is a management device so I want it on the MGMT subnet (10.1.1.x) with all the other management devices (router, switch, and two WAPs - small, simple network.) So I configured the LXC for a static IP of 10.1.1.10 - and with that IP it can't ping anything but the router (which is also the default gateway so I'd think it should be able to ping that no matter how screwed up everything else is). Here are screenshots showing the config details for the LXC. I've searched and searched but all I've found are a couple threads where the resolution wasn't applicable in my case. If there's any additional info or screenshots I can provide to help you help me, please let me know. Thank you for your time and consideration.

https://imgur.com/a/UyR0II9
https://imgur.com/a/D3A9m4m
https://imgur.com/b0aFqR9

 

[sstreet]

Is the MGMT VLAN the default VLAN? If not, you need to set the VLAN ID (reference second screen shot)

And is the Router (10.1.1.x) on the same VLAN?

Assuming also that your switch(es) are VLAN aware and configured properly.