Currently IT, CT integration is the trend, based on the new industry cloud, video, and so demand is emerging, the world's major operators, Internet companies, IT companies, communications equipment manufacturers, and many start-up companies are planning a new generation of green solutions. Currently kind of argument is sd-wan be on the same line services and quality of existing lines, but low prices, fast opening, so sd-wan can replace the existing SDH / MPLS leased line solutions, a unified industry benchmark for green solutions . But is that so? If not, what is really the best technical solution?
At present, China leased line services in the existing network solution is based MSAP SDH technology. MSAP itself is not ITU-T international standard, but China green industry standards. Prior to the introduction of industry standards are not available in the market hundreds of companies doing their own unique green solutions, MSAP is one of them, and is the most popular program. Later MSAP program was China Communications Standards Committee adopted green as the industry standard. So far there is no foreign MSAP this concept.
DETAILED MSAP network based on SDH technology as shown below:
SDH technology is based primarily MSAP central office and remote network equipment manufacturers and composition, operating machine room placed on the central office, the remote device is placed on the user side. The central office is connected via SDH transmission network, overlay mode is referred to through the present.
The International Private Leased solutions lackluster, sd-wan combines NFV and SDN technology to provide ideological line, so in recent years, sd-wan, once launched, immediately sought after by a lot.
sd-wan architecture as shown below:
sd-wan as long as the company has a VPN license can carry out operations. Mainly by the POP and the terminal, and a controller (NMS) composition, the POP with exactly the same effect MSAP central office equipment, relying on the operator is connected through the transmission network between the POP and the cloud; MSAP terminal and the remote device exactly the same effect, deployed on the client side, the Internet-based access / 4G, reducing the last few kilometers fiber deployment costs, while shortening the opening time of the optical fiber. Using IPSEC mechanisms to ensure security.
sd-wan on the network concept and msap sdh-based technology is the same, through an intermediate network; while the device is not decoupled and the NMS, the NMS docking direction north, this point is the same. Just in the process of operation, easy binding equipment / technology providers too dead.
三大运营商积极跟进国际上的sd-wan，自己还推出了基于MPLS技术的MSAP产品。基于MPLS技术的MSAP产品充分借鉴了早期SDH技术的MSAP的优势，同时规避了被厂商绑定的缺陷。这样的架构相比于国际上的mpls专线有很大不同。也属于中国独创。