Bond Types and Switch Aggregated

I have a Bond0 that has the management switch and IP addresses against it. I always create an additional management port on an unused nic port if I can - and this has gotten me out of trouble.

However -

I have LACP aggregates on the switch and Proxmox is unable to talk.
So I have tried different bond types - I can get the VMBR to work for hosted VM's - and oddly I can connected to the management network via security VPN and manage the device.
But other devices on the management network...

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