
Explore the virtual port channel (vpc) technology with separate control planes, BBC concepts, and fast convergence for layer-2 networks.
Learn to configure a Cisco Nexus VPC with keep alive and a peer link using member ports, after enabling the feature and creating the BBC domain for reliable inter-device connectivity.
Learn how global and per-channel consistency checks detect mismatches between VPC peers, identify type one and type two failures, and explain effects on BBCs and member reports with corrective measures.
Learn how spanning tree works in a vpc environment, where the primary device generates on designated ports and the secondary forwards over the peer link, and how convergence affects outages.
Explore how the VPC peer-switch feature uses a shared bridge MAC across primary and secondary devices to eliminate spanning-tree disruption during root bridge failures, provided both sides share identical priority.
Explain VPC loop avoidance in the BBC domain by detailing how primary, secondary, and orphan boards use FDA groups 256 and 257 to control broadcast flooding.
This lecture explains how hsrp and vpc enable active-active data planes with an active device controlling the MAC, plus control plane ownership and primary and secondary roles.
Explore the Cisco Nexus VPC peer-gateway feature, including how primary and secondary devices learn virtual MACs, forward traffic locally, avoid asymmetrical routing, and configure exclusions to prevent data-plane disruptions.
Explore VPC failure scenarios, including the primary and secondary device roles, link and member port shutdowns, and split-brain avoidance, keep-alive timers, and auto recovery.
Explore the Cisco Nexus VPC auto recovery feature and how it handles failure scenarios, including primary–secondary role reversal, BBC member ports and surveys restoration, and enabling auto recovery with timeouts.
I am a CCIE LAB certified Network Engineer. My CCIE number is 57391. I have been working in network for almost 10 years now. I have designed this CISCO Nexus VPC Series. In this 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 Port-Channel across multiple switches (i.e. vPC peers).vPC is similar to Virtual Switch System (VSS) on the Catalyst 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 switch is managed and configured independently. It is important to remember that with vPC both switches are managed independently. This means you will need to create and permit your VLANs on both Nexus switches. vPC Domain - Includes the vPC Peers, KeepAlive Links and the Port-Channels that use the vPC technology. vPC Peer Switch - The other switch within the vPC domain. Each switch is connected via the vPC peer link. It's 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 ensure the switches are both operational and running vPC. vPC Peer Link - Connects both vPC peer switches and carries BPDUs, HSRPs, and MAC addresses to its vPC peer.