Virtual Subnet: A Scalable Data Center Interconnection Solution
Speakers: Xiaohu Xu, Huawei Technologies Co., Ltd.
Virtual Subnet (VS) provides a scalable IP-only L2VPN service by reusing the proven BGP/MPLS IP VPN [RFC4364] and ARP proxy [RFC925][RFC1027] technologies. VS could be used for interconnecting geographically dispersed data center locations at scale. In contrast with the existing VPLS solution, VS alleviates the broadcast storm impact on the network performance to a great extent by splitting the otherwise whole ARP broadcast and unknown unicast flooding domain associated with an IP subnet that has been extended across the MPLS/IP backbone, into multiple isolated parts per data center location, besides, the MAC table capacity demand on CE switches is greatly reduced due to the usage of ARP proxy.
See more at: https://www.nanog.org/meetings/nanog5...