What is Cisco Nexus FabricPath?

What is Cisco FabricPath? Cisco FabricPath is a technology that is designed to overcome STP limitations including scalability, convergence and unnecessary flooding. It runs IS-IS in the control plane and for the same reason, it is also called Layer 2 routing.

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What control plane protocol is in use with FabricPath?

With FabricPath, you use the Layer 2 Intermediate System-to-Intermediate System (IS-IS) protocol for a single control plane that functions for unicast, broadcast, and multicast packets.

Why VXLAN uses UDP?

One advantage of a UDP tunnel is with ECMP. VXLAN encodes flow information in the UDP source port thus allowing routers to do flow load balancing. Note that there are other tunneling protocols such as NVGRE that don’t use UDP but go directly on top of IP.

Is VXLAN the same as VLAN?

VxLAN is very similar to VLAN, which also encapsulates layer 2 frames and segments networks. The main difference is that VLAN uses the tag on the layer 2 frame for encapsulation and can scale up to 4000 VLANs.

Is VXLAN UDP or TCP?

UDP
VXLAN encodes flow information in the UDP source port thus allowing routers to do flow load balancing. Note that there are other tunneling protocols such as NVGRE that don’t use UDP but go directly on top of IP.

What is the VXLAN packet size?

The VXLAN encapsulation header adds 50 bytes to the overall size of an Ethernet frame.

What is the difference between VSS and vPC?

As far as the difference, VSS has one control plane vs VPC 2 different ones. With VSS you eliminate the use of VRRP, HSRP, etc.. with VPC you still have to use one HSRP or VRRP. These platforms are build for different environments. Nexus is mainly used for data center and VSS for campus environment.

Is VXLAN a Layer 3?

In centralized VXLAN gateway networking, the Layer 3 gateway is deployed on only one device. All traffic sent across subnets is forwarded through the Layer 3 gateway, implementing centralized traffic management.