The Nexus 2000 as we all know gets its intelligence from its parent switch, i.e. Nexus 7000 or 5000. The Nexus 2000 for the most part is just a dumb device, otherwise known as a Fabric Extender (FEX). It may be a surprise for some, but even communication between two ports on the same fabric extender goes like this: FEX Source Port – Parent Switch – FEX Destination port. The same holds true for the Cisco UCS Fabric Interconnect (6100 and 6200 series) and the local FEX that resides in a UCS Blade Enclosure.
After having a recent conversation with Cisco and a financial customer around how L2 multicast works between a UCS 6120 and a FEX, it actually uncovered something interesting with regards to how this multicast flows.
After having a recent conversation with Cisco and a financial customer around how L2 multicast works between a UCS 6120 and a FEX, it actually uncovered something interesting with regards to how this multicast flows.
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