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Just a heads up for anyone contemplating a port channel with gig ports gi 1/1/3 & 4 using the C3850-NM-2-10G module.
You actually need to configure the te 1/1/3 & 4 ports even though they will only use 1gig or else you may get a loop event.
Intuit...
Indeed, Ton, you said it "keep it in mind" and the rest of it too.
We network engineers shouldn't be making simple logical assumptions about something that should be so straightforward