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Virtual MAC on Interface changes back on HA Mode


I am currently operating two Sophos UTM behind a router which is running great.

For redundancy reasons I now want to add another pair to operate in HA mode.

The issue: All UTM's use the SAME Interface MAC when switching to HA mode.

I can manually adjust the virtual MAC (Interface > Hardware) but after some times it's automatically chaning back to default.

Now I have two Sophos UTM (pairs in HA mode) with the same virtual MACs - my router & network of course doesn't like this.

I found an old article that it seems chaning the virtual MAC is no supported in HA mode.

Is there any solution / workaround available?


Best regards

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