A network administrator wants to provide high availability in a data center environment by making sure that there is no reconvergence of Layer 2 and Layer 3
protocols when there is a Layer 3 switch failure.
Which Cisco Nexus feature fulfills this purpose?

A.
ISSU

B.
VSS

C.
vPC

D.
MEC

Explanation:
vPC (Virtual Port-Channel), also known as multichassis EtherChannel (MEC) is a feature on the Cisco Nexus switches that provides the ability to configure a
PortChannel across multiple switches (i.e vPC peers).
vPC is similar to Virtual Switch System (VSS) on the Catalysts 6500s. However the key difference between vPC and VSS is that VSS creates a single logical switch.
This results in a single control plane for both management and configuration purposes. Whereas with vPC each Nexus switch (vPC) is managed and configured
independently.

It is important to remember that with vPC both switches are managed independently. In turn meaning you will need to create and permit your VLANs on both
Nexus`s switches.
COMPONENTS
vPC consists of the following components. Below shows an example diagram showing vPC key components,

Lets look at each of the vPC components,
vPC Domain – Includes the vPC Peers, KeepAlive Links and the PortChannels that use the vPC technology.
vPC Peer Switch – The other switch within the vPC domain. Each switch is connected via the vPC peer link. Its also worth noting that one device is selected as
primary and the other secondary.
vPC Member Port – Ports included within the vPCs.

vPC Peer Keepalive Link – Connects both vPC peer switches and carries monitoring traffic to/from each peer switch. Monitoring is performed to ensures the switch
(s) is both operational and running vPC.
vPC Peer Link – Connects both vPC peer switches. And carries BPDUs, HSRPs, and MAC addresses to its vPC peer. In the event of vPC member port failure it
also carries unicast traffic to the peer switch.
Orphan Port – An orphan port is a port that is configured with a vPC VLAN (i.e a VLAN that is carried over the vPC peer link) and is not configured as a vPC member
port.