Question

A data center architect is comparing overlay encapsulation options for a new multitenant fabric. The team wants a Layer 2 overlay that transports tenant frames over a Layer 3 underlay, uses UDP as the transport protocol so that ECMP load balancing across the underlay can be achieved via source-port entropy, and provides a 24-bit segment identifier for tenant isolation. Which encapsulation technology meets ALL of these requirements?

Accepted Answer

VXLAN, which encapsulates the original Layer 2 frame in a UDP packet with a 24-bit VNI

Answer

NVGRE, which encapsulates the frame in GRE with a 24-bit Tenant Network Identifier

Answer

802.1Q, which tags the frame with a 12-bit VLAN ID for tenant separation

Answer

MPLS, which pushes a 20-bit label stack to isolate tenant traffic