Ali Sajassi is a Distinguished Engineer at Cisco Systems where he has been working on network virtualization and overlay solutions for SP, DC, and Enterprise segments. These solutions include multicast for L2, L3, and IRB overlay networks, distributed virtual PE using DC fabric, service function chaining in SPDC, inter-DC solutions with seamless integration of L2/L3VPN PEs, next gen Metro and aggregation networks for SPs, and virtualized overlay private networks for Enterprises. Some of the areas of his expertise are L2VPN, L3VPN, BGP, Multicast VPN, Network Virtualization Overlay for data centers, and inter-DC technologies and protocol. He has invented numerous technologies and protocols with wide applicability in SP, DC, and Enterprise networks. He invented EVPN and PBB-EVPN and introduced them to networking industry in 2009. Prior to EVPN, he innovated PBB-VPLS, H-VPLS with QinQ access, CFM (IEEE 802.1ag), and co-invented SPB-VID (IEEE 802.1aq) and SPB-ECMP (IEEE 802.1Qbp). He has participated at IETF, IEEE, and ITU standards groups and he has made numerous contributions to these groups in the area of L2 and L3 VPN and Metro Ethernet. Ali has over 90 patents registered to his name. Ali received a B.S. in Electrical Engineering and a B.S. in Computer Science from University of Wisconsin-Madison. He holds an M.S. in Electrical Engineering from Purdue University and he completed his Ph.D. studies at George Washington University in the area of networking and communications.