Hub Cluster Redundancy With Matter Devices

Everything Matter
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Hi all, I was hoping for some clarification before I went ahead and pulled the trigger on an M100 to complement my M3 hub.

I know that it’d strengthen the meshes, but I’m trying to figure out if it has any real value besides that. There’s some kind of vague verbiage on the product pages about hub clusters and redundancy, that if one fails the other can take over running automations.
I was wondering, if anyone can confirm that’s actually true when the automations are with Matter Devices where the M3 hub is the matter controller?

Essentially, does anyone know if an M100 hub (or other secondary hub) can act as a backup matter controller in the event the primary one fails or goes offline?

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Yes , should work like that

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It does not.

I purchased an M100 hub to complement my M3, added it to the same thread network, disconnected the M3 hub, and unfortunately all of my matter devices went offline along with it.

You can manually swap the primary matter controller which brings them all back online, but I do not see a way to have Aqara automatically fallback to using secondary matter controllers when the primary goes offline, which is pretty disappointing.