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Cisco Nexus 2000/5000/7000 vPC Design Options
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Virtual PortChannel (vPC) allows two links that are connected to two different physical Cisco Nexus 5000 or 7000 switches to appear to the downstream device as a single PortChannel link. That downstream device could be a server, Nexus 2000, or any Classical Ethernet switch.
vPC is useful to prevent spanning tree from blocking redundant links in the topology. After all you have spent fortune and bought those expensive 10G ports and the last thing you want is for spanning tree to block them.
Having said that they are several ways to connect the Cisco Nexus Fabric Extender (FEX) to its parent the Nexus 5000 or 7000 switch. In this post I'm going to discuss supported vPC topologies for the Nexus series. I'm going to start with the Nexus 2000/5000 now and will add a separate post for the Nexus 2000/7000 options later.
vPC is useful to prevent spanning tree from blocking redundant links in the topology. After all you have spent fortune and bought those expensive 10G ports and the last thing you want is for spanning tree to block them.
Having said that they are several ways to connect the Cisco Nexus Fabric Extender (FEX) to its parent the Nexus 5000 or 7000 switch. In this post I'm going to discuss supported vPC topologies for the Nexus series. I'm going to start with the Nexus 2000/5000 now and will add a separate post for the Nexus 2000/7000 options later.
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