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> I wonder if their setup achieves the same degree of transparency, because afaiui, that's just not possible involving a 802.1Q-compliant (Linux) bridge.

Can you elaborate on what is not transparent about 802.1q bridge in Linux?

I hear you on the system tuning. Whenever I change sysctl variables I always include a comment with what the default was and why the new setting is better. I don't trust sysctl copy pasta w/o decent explanations.

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There's a number of "special" Ethernet addresses that a proper Ethernet bridge must never forward. The Linux bridge implements a mechanism to ignore _some_ of these constraints, but not all of them. If you ned that, you can always get to manual patching in https://github.com/torvalds/linux/blob/d42f7708e27cc68d080ac... et al.

Thank you for your reply. I have had some weird issues with Linux bridges in the past and now I'm wondering if this could have been the culprit.

> include a comment

You may already do this, but in general, please include the Year, Month, Kernel Version and your own Name when doing this.

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