> I believe you want agr(4), "link aggregation pseudo network interface
> driver."

Excellent.  That is most of the way there.  (I think I don't want LACP,
just static configuration, but I could be wrong, and even if not, I
expect that to be small hacks to agr.)

Thank you very much.  (Oh, and it appears I was wrong; the cisco term
seems to be EtherChannel.)

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