UCS DOES do port-channel from the FI southbound to IOMs / FEXs / IFMs / multiport VIC on C-Series. UCS DOES do port-channel from the IOMs / FEXs / IFMs to B-Series / C-Series. The UCS Servers behind a UCS FI can NOT do LACP across multiple switching hops to a northbound switch. There is zero need to do this. Given a generic topology: More @Wikipedia
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